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Update collection.js #3384

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Update collection.js #3384

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22 changes: 14 additions & 8 deletions src/utils/collection.js
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Original file line number Diff line number Diff line change
Expand Up @@ -53,15 +53,21 @@ export function deepForEach (array, callback) {
*
* @return {Array | Matrix} res
*/
export function deepMap (array, callback, skipZeros) {
if (array && (typeof array.map === 'function')) {
// TODO: replace array.map with a for loop to improve performance
return array.map(function (x) {
return deepMap(x, callback, skipZeros)
})
} else {
return callback(array)
export function deepMap(array, callback, skipZeros) {
const result = [];
for (let i = 0; i < array.length; i++) {
const value = array[i];
if (Array.isArray(value)) {
result.push(deepMap(value, callback, skipZeros));
} else {
if (!skipZeros || value !== 0) {
result.push(callback(value));
} else {
result.push(value);
}
}
}
return result;
}

/**
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