reassign or extend string

Benchmark created on June 24, 2024

Setup

class ExtendedArray extends Array {
    constructor(items) {
        super(items)
    }

    get last() {
        return this[this.length - 1]
    }

    addToLastWithGetter(text) {
        this.last.text ??= ''
        this.last.text += text
    }

    addToLast(text) {
        this[this.length - 1].text ??= ''
        this[this.length - 1].text += text
    }

    concatToLast(text) {
        this[this.length - 1].text ??= ''
        this[this.length - 1].text = this[this.length - 1].text + text
    }

    templateStringToLast(text) {
        this[this.length - 1].text ??= ''
        this[this.length - 1].text = `${this[this.length - 1].text}${text}`
    }

    replaceLast(text) {
        const last = this[this.length - 1]
        this[this.length - 1] = {
            text: last.text + text,
        }
    }
}

let addToLastWithGetter = new ExtendedArray({text: 'x'})
let addToLast = new ExtendedArray({text: 'x'})
let concatToLast = new ExtendedArray({text: 'x'})
let templateStringToLast = new ExtendedArray({text: 'x'})
let replaceLast = new ExtendedArray({text: 'x'})

Test runner

addToLastWithGetter.addToLastWithGetter("y")

addToLast.addToLast("y")

concatToLast.concatToLast("y")

templateStringToLast.templateStringToLast("y")

replaceLast.replaceLast("y")

Revisions

You can edit these tests or add more tests to this page by appending /edit to the URL.

• Revision 1: published on June 24, 2024
• Revision 2: published on June 25, 2024