jsmodern/dist/array/chunks.js

An extension to existing JavaScript, influenced by other great languages such as Rust, Dart, Java, Golang, etc.

export const chunks = {
    label: 'chunks',
    fn: function arrayChunks(chunkSize) {
        const ctx = this;
        const len = ctx.length;
        const chunkSizeInt = Number(chunkSize);
        if ('number' !== typeof (chunkSize) || chunkSizeInt < 1) {
            throw new TypeError(`Expect 'chunkSize' to be a number that is at least 1`);
        }
        if (!len)
            return [];
        if (1 === len || len === chunkSizeInt)
            return [ctx];
        const set = [];
        let subset = [];
        let i = chunkSizeInt;
        for (const n of ctx) {
            if (!i) {
                i = chunkSizeInt;
                set.push(subset);
                subset = [];
            }
            subset.push(n);
            i -= 1;
        }
        set.push(subset);
        return set;
    },
};
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