Returns an array of successive items from coll while pred(item) returns true.
function takeWhile(coll, pred, ctx) { }
npm i -S take-while
var assert = require('assert');
var takeWhile = require('take-while');
var is = require('is-predicate');
var arr = [-2, -1, 0, 1, 2, 3];
assert.deepEqual(takeWhile(arr, is.neg), [-2, -1]); // true