5 examples of 'how will you change the last element of an array' in JavaScript

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7function allButLast<T>(array: T[]): T[] {
8 return array.slice(0, -1);
9}
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155export function last<A>(array: Array<A>): Optional<A> {
156 const length = array.length;
157 return length ? array[length - 1] : undefined;
158}
13function last(array) {
14 const length = array == null ? 0 : array.length
15 return length ? array[length - 1] : undefined
16}
163export function last(array) {
164 return array[array.length - 1]
165}
54popInArray() {
55 this.for.pop();
56}

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