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Merge pull request #548 from Dikendev/master
day 1 portuguese translation
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‎Portuguese/02_Day_Data_types/02_day_data_types.md

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‎Portuguese/02_Day_Data_types/02_day_starter/index.html

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<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>30DaysOfJavaScript</title>
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</head>
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<body>
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<h1>30DaysOfJavaScript:02 Day</h1>
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<h2>Data types</h2>
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<!-- import your scripts here -->
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<script src="./main.js"></script>
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</body>
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</html>

‎Portuguese/02_Day_Data_types/02_day_starter/main.js

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// this is your main.js script

‎Portuguese/02_Day_Data_types/day_1_2.png

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‎Portuguese/02_Day_Data_types/math_object.js

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const PI = Math.PI
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console.log(PI) // 3.141592653589793
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console.log(Math.round(PI)) // 3; to round values to the nearest number
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console.log(Math.round(9.81)) // 10
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console.log(Math.floor(PI)) // 3; rounding down
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console.log(Math.ceil(PI)) // 4; rounding up
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console.log(Math.min(-5, 3, 20, 4, 5, 10)) // -5, returns the minimum value
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console.log(Math.max(-5, 3, 20, 4, 5, 10)) // 20, returns the maximum value
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const randNum = Math.random() // creates random number between 0 to 0.999999
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console.log(randNum)
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// Let create random number between 0 to 10
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const num = Math.floor(Math.random() * 11) // creates random number between 0 and 10
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console.log(num)
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//Absolute value
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console.log(Math.abs(-10)) //10
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//Square root
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console.log(Math.sqrt(100)) // 10
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console.log(Math.sqrt(2)) //1.4142135623730951
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// Power
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console.log(Math.pow(3, 2)) // 9
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console.log(Math.E) // 2.718
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// Logarithm
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//Returns the natural logarithm of base E of x, Math.log(x)
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console.log(Math.log(2)) // 0.6931471805599453
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console.log(Math.log(10)) // 2.302585092994046
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// Trigonometry
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console.log(Math.sin(0))
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console.log(Math.sin(60))
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console.log(Math.cos(0))
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console.log(Math.cos(60))

‎Portuguese/02_Day_Data_types/non_primitive_data_types.js

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let nums = [1, 2, 3]
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nums[0] = 10
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console.log(nums) // [10, 2, 3]
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let nums = [1, 2, 3]
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let numbers = [1, 2, 3]
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console.log(nums == numbers) // false
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let userOne = {
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name: 'Asabeneh',
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role: 'teaching',
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country: 'Finland'
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}
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let userTwo = {
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name: 'Asabeneh',
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role: 'teaching',
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country: 'Finland'
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}
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console.log(userOne == userTwo) // false
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let numbers = nums
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console.log(nums == numbers) // true
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let userOne = {
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name:'Asabeneh',
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role:'teaching',
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country:'Finland'
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}
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let userTwo = userOne
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console.log(userOne == userTwo) // true

‎Portuguese/02_Day_Data_types/number_data_types.js

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let age = 35
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const gravity = 9.81 //we use const for non-changing values, gravitational constant in m/s2
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let mass = 72 // mass in Kilogram
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const PI = 3.14 // pi a geometrical constant
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//More Examples
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const boilingPoint = 100 // temperature in oC, boiling point of water which is a constant
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const bodyTemp = 37 // oC average human body temperature, which is a constant
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console.log(age, gravity, mass, PI, boilingPoint, bodyTemp)

‎Portuguese/02_Day_Data_types/primitive_data_types.js

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let word = 'JavaScript'
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// we dont' modify string
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// we don't do like this, word[0] = 'Y'
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let numOne = 3
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let numTwo = 3
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console.log(numOne == numTwo) // true
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let js = 'JavaScript'
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let py = 'Python'
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console.log(js == py) //false
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let lightOn = true
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let lightOff = false
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console.log(lightOn == lightOff) // false

‎Portuguese/02_Day_Data_types/string_concatenation.js

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// Declaring different variables of different data types
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let space = ' '
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let firstName = 'Asabeneh'
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let lastName = 'Yetayeh'
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let country = 'Finland'
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let city = 'Helsinki'
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let language = 'JavaScript'
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let job = 'teacher'
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// Concatenating using addition operator
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let fullName = firstName + space + lastName // concatenation, merging two string together.
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console.log(fullName)
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let personInfoOne = fullName + '. I am ' + age + '. I live in ' + country // ES5
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console.log(personInfoOne)
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// Concatenation: Template Literals(Template Strings)
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let personInfoTwo = `I am ${fullName}. I am ${age}. I live in ${country}.` //ES6 - String interpolation method
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let personInfoThree = `I am ${fullName}. I live in ${city}, ${country}. I am a ${job}. I teach ${language}.`
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console.log(personInfoTwo)
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console.log(personInfoThree)

‎Portuguese/02_Day_Data_types/string_data_types.js

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let space = ' ' // an empty space string
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let firstName = 'Asabeneh'
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let lastName = 'Yetayeh'
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let country = 'Finland'
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let city = 'Helsinki'
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let language = 'JavaScript'
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let job = 'teacher'

‎Portuguese/02_Day_Data_types/string_methods/accessing_character.js

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// Let us access the first character in 'JavaScript' string.
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let string = 'JavaScript'
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let firstLetter = string[0]
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console.log(firstLetter) // J
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let secondLetter = string[1] // a
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let thirdLetter = string[2]
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let lastLetter = string[9]
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console.log(lastLetter) // t
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let lastIndex = string.length - 1
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console.log(lastIndex) // 9
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console.log(string[lastIndex]) // t

‎Portuguese/02_Day_Data_types/string_methods/char_at.js

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// charAt(): Takes index and it returns the value at that index
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string.charAt(index)
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let string = '30 Days Of JavaScript'
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console.log(string.charAt(0)) // 3
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let lastIndex = string.length - 1
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console.log(string.charAt(lastIndex)) // t

‎Portuguese/02_Day_Data_types/string_methods/char_code_at.js

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// charCodeAt(): Takes index and it returns char code(ASCII number) of the value at that index
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string.charCodeAt(index)
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let string = '30 Days Of JavaScript'
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console.log(string.charCodeAt(3)) // D ASCII number is 51
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let lastIndex = string.length - 1
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console.log(string.charCodeAt(lastIndex)) // t ASCII is 116

‎Portuguese/02_Day_Data_types/string_methods/concat.js

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// concat(): it takes many substrings and creates concatenation.
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// string.concat(substring, substring, substring)
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let string = '30'
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console.log(string.concat("Days", "Of", "JavaScript")) // 30DaysOfJavaScript
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let country = 'Fin'
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console.log(country.concat("land")) // Finland

‎Portuguese/02_Day_Data_types/string_methods/ends_with.js

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// endsWith: it takes a substring as an argument and it checks if the string starts with that specified substring. It returns a boolean(true or false).
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// string.endsWith(substring)
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let string = 'Love is the best to in this world'
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console.log(string.endsWith('world')) // true
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console.log(string.endsWith('love')) // false
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console.log(string.endsWith('in this world')) // true
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let country = 'Finland'
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console.log(country.endsWith('land')) // true
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console.log(country.endsWith('fin')) // false
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console.log(country.endsWith('Fin')) // false

‎Portuguese/02_Day_Data_types/string_methods/includes.js

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// includes(): It takes a substring argument and it check if substring argument exists in the string. includes() returns a boolean. It checks if a substring exist in a string and it returns true if it exists and false if it doesn't exist.
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let string = '30 Days Of JavaScript'
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console.log(string.includes('Days')) // true
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console.log(string.includes('days')) // false
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console.log(string.includes('Script')) // true
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console.log(string.includes('script')) // false
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console.log(string.includes('java')) // false
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console.log(string.includes('Java')) // true
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let country = 'Finland'
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console.log(country.includes('fin')) // false
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console.log(country.includes('Fin')) // true
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console.log(country.includes('land')) // true
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console.log(country.includes('Land')) // false

‎Portuguese/02_Day_Data_types/string_methods/index_of.js

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// indexOf(): Takes takes a substring and if the substring exists in a string it returns the first position of the substring if does not exist it returns -1
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string.indexOf(substring)
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let string = '30 Days Of JavaScript'
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console.log(string.indexOf('D')) // 3
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console.log(string.indexOf('Days')) // 3
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console.log(string.indexOf('days')) // -1
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console.log(string.indexOf('a')) // 4
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console.log(string.indexOf('JavaScript')) // 11
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console.log(string.indexOf('Script')) //15
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console.log(string.indexOf('script')) // -1

‎Portuguese/02_Day_Data_types/string_methods/last_index_of.js

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// lastIndexOf(): Takes takes a substring and if the substring exists in a string it returns the last position of the substring if it does not exist it returns -1
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let string = 'I love JavaScript. If you do not love JavaScript what else can you love.'
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console.log(string.lastIndexOf('love')) // 67
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console.log(string.lastIndexOf('you')) // 63
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console.log(string.lastIndexOf('JavaScript')) // 38

‎Portuguese/02_Day_Data_types/string_methods/length.js

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// length: The string length method returns the number of characters in a string included empty space. Example:
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let js = 'JavaScript'
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console.log(js.length) // 10
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let firstName = 'Asabeneh'
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console.log(firstName.length) // 8

‎Portuguese/02_Day_Data_types/string_methods/match.js

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// match: it takes a substring or regular expression pattern as an argument and it returns an array if there is match if not it returns null. Let us see how a regular expression pattern looks like. It starts with / sign and ends with / sign.
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let string = 'love'
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let patternOne = /love/ // with out any flag
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let patternTwo = /love/gi // g-means to search in the whole text, i - case insensitive
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string.match(substring)
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let string = 'I love JavaScript. If you do not love JavaScript what else can you love.'
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console.log(string.match('love')) //
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/*
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output
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["love", index: 2, input: "I love JavaScript. If you do not love JavaScript what else can you love.", groups: undefined]
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*/
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let pattern = /love/gi
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console.log(string.match(pattern)) // ["love", "love", "love"]
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// Let us extract numbers from text using regular expression. This is not regular expression section, no panic.
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let txt = 'In 2019, I run 30 Days of Python. Now, in 2020 I super exited to start this challenge'
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let regEx = /\d/g // d with escape character means d not a normal d instead acts a digit
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// + means one or more digit numbers,
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// if there is g after that it means global, search everywhere.
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console.log(txt.match(regEx)) // ["2", "0", "1", "9", "3", "0", "2", "0", "2", "0"]
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console.log(txt.match(/\d+/g)) // ["2019", "30", "2020"]

‎Portuguese/02_Day_Data_types/string_methods/repeat.js

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// repeat(): it takes a number argument and it returned the repeated version of the string.
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// string.repeat(n)
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let string = 'love'
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console.log(string.repeat(10)) // lovelovelovelovelovelovelovelovelovelove

‎Portuguese/02_Day_Data_types/string_methods/replace.js

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// replace(): takes to parameter the old substring and new substring.
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// string.replace(oldsubstring, newsubstring)
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let string = '30 Days Of JavaScript'
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console.log(string.replace('JavaScript', 'Python')) // 30 Days Of Python
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let country = 'Finland'
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console.log(country.replace('Fin', 'Noman')) // Nomanland

‎Portuguese/02_Day_Data_types/string_methods/search.js

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// search: it takes a substring as an argument and it returns the index of the first match.
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// string.search(substring)
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let string = 'I love JavaScript. If you do not love JavaScript what else can you love.'
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console.log(string.search('love')) // 2

‎Portuguese/02_Day_Data_types/string_methods/split.js

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// split(): The split method splits a string at a specified place.
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let string = '30 Days Of JavaScript'
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console.log(string.split()) // ["30 Days Of JavaScript"]
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console.log(string.split(' ')) // ["30", "Days", "Of", "JavaScript"]
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let firstName = 'Asabeneh'
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console.log(firstName.split()) // ["Asabeneh"]
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console.log(firstName.split('')) // ["A", "s", "a", "b", "e", "n", "e", "h"]
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let countries = 'Finland, Sweden, Norway, Denmark, and Iceland'
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console.log(countries.split(',')) // ["Finland", " Sweden", " Norway", " Denmark", " and Iceland"]
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console.log(countries.split(', ')) // ["Finland", "Sweden", "Norway", "Denmark", "and Iceland"]

‎Portuguese/02_Day_Data_types/string_methods/starts_with.js

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// startsWith: it takes a substring as an argument and it checks if the string starts with that specified substring. It returns a boolean(true or false).
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// string.startsWith(substring)
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let string = 'Love is the best to in this world'
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console.log(string.startsWith('Love')) // true
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console.log(string.startsWith('love')) // false
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console.log(string.startsWith('world')) // false
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let country = 'Finland'
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console.log(country.startsWith('Fin')) // true
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console.log(country.startsWith('fin')) // false
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console.log(country.startsWith('land')) // false

‎Portuguese/02_Day_Data_types/string_methods/substr.js

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//substr(): It takes two arguments,the starting index and number of characters to slice.
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let string = 'JavaScript'
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console.log(string.substr(4,6)) // Script
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let country = 'Finland'
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console.log(country.substr(3, 4)) // land

‎Portuguese/02_Day_Data_types/string_methods/substring.js

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// substring(): It takes two arguments,the starting index and the stopping index but it doesn't include the stopping index.
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let string = 'JavaScript'
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console.log(string.substring(0,4)) // Java
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console.log(string.substring(4,10)) // Script
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console.log(string.substring(4)) // Script
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let country = 'Finland'
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console.log(country.substring(0, 3)) // Fin
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console.log(country.substring(3, 7)) // land
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console.log(country.substring(3)) // land

‎Portuguese/02_Day_Data_types/string_methods/to_lowercase.js

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// toLowerCase(): this method changes the string to lowercase letters.
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let string = 'JavasCript'
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console.log(string.toLowerCase()) // javascript
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let firstName = 'Asabeneh'
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console.log(firstName.toLowerCase()) // asabeneh
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let country = 'Finland'
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console.log(country.toLowerCase()) // finland

‎Portuguese/02_Day_Data_types/string_methods/to_uppercase.js

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// toUpperCase(): this method changes the string to uppercase letters.
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let string = 'JavaScript'
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console.log(string.toUpperCase()) // JAVASCRIPT
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let firstName = 'Asabeneh'
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console.log(firstName.toUpperCase()) // ASABENEH
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let country = 'Finland'
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console.log(country.toUpperCase()) // FINLAND

‎Portuguese/02_Day_Data_types/string_methods/trim.js

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//trim(): Removes trailing space in the beginning or the end of a string.
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let string = ' 30 Days Of JavaScript '
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console.log(string) //
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console.log(string.trim(' ')) //
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let firstName = ' Asabeneh '
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console.log(firstName)
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console.log(firstName.trim()) //

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