Removes elements in an array until the passed function returns false
.
Returns the removed elements.
for...of
loop over Array.prototype.entries()
until the returned value from the function is falsy.Array.prototype.slice()
.fn
, accepts a single argument which is the value of the element.const takeWhile = (arr, fn) => {
for (const [i, val] of arr.entries()) if (!fn(val)) return arr.slice(0, i);
return arr;
};
takeWhile([1, 2, 3, 4], n => n < 3); // [1, 2]
JavaScript, Array
Removes elements from the end of an array until the passed function returns false
.
Returns the removed elements.
JavaScript, Array
Removes elements from the end of an array until the passed function returns true
.
Returns the removed elements.
JavaScript, Array
Removes elements in an array until the passed function returns true
.
Returns the removed elements.