intersperse

Place a separator between every value.

Similar: interleave, intermix, interpolate, intersperse.

function intersperse(x, v)
// x: an iterable
// v: separator

const xiterable = require('extra-iterable');

var x = [1, 2, 3];
[...xiterable.intersperse(x, 10)];
// → [1, 10, 2, 10, 3]

var x = [1, 2, 3, 4];
[...xiterable.intersperse(x, 10)];
// → [1, 10, 2, 10, 3, 10, 4]

References

• Data.List.intersperse: Haskell
• Data.List.intercalate: Haskell