Question

172

Does JavaScript support array/list comprehensions like Python?

rated 0 times [ 177] [ 5] / answers: 1 / hits: 112246 / 9 Years ago, sat, july 11, 2015, 12:00:00

I'm practicing/studying both JavaScript and Python. I'm wondering if Javascript has the equivalence to this type of coding.

I'm basically trying to get an array from each individual integer from the string for practice purposes. I'm more proficient in Python than JavaScript

Python:

string = '1234-5'



forbidden = '-'



print([int(i) for i in str(string) if i not in forbidden])

Does Javascript have something similar for me to do above?

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kieraelsies

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answered 9 Years ago kalia · Accepted Answer

Update: Array comprehensions were removed from the standard. Quoting MDN:

The array comprehensions syntax is non-standard and removed starting with Firefox 58. For future-facing usages, consider using Array.prototype.map, Array.prototype.filter, arrow functions, and spread syntax.

See this answer for an example with Array.prototype.map:

let emails = people.map(({ email }) => email);

Original answer:

Yes, JavaScript will support array comprehensions in the upcoming EcmaScript version 7.

Here's an example.

var str =  "1234-5";

var ignore = "-";



console.log([for (i of str) if (!ignore.includes(i)) i]);