javascript equivalent to php unpack() function

Question

I am looking for the javascript equivalent of php unpack() function? can someone direct me please. Thanks!

Answer 1

Here is an unpack function for JS:

https://github.com/kvz/phpjs/blob/master/workbench/misc/unpack.js

Answer 2

If nodejs (4.5/6.5) would be the environment, Buffer can partially achieve the functionality of unpack():

const buf = Buffer.from([0, 0, 0, 5]);
// Prints: 83886080
console.log(buf.readInt32LE());

See its documentation: https://nodejs.org/api/buffer.html#buffer_buf_readint32le_offset_noassert

This is equivalent to:

 unpack('V', join('', array_map(function ($a) { return chr($a); }, [0, 0, 0, 5])));