INNER CODE UNIT · JavaScript

addAll

pegaltier/awesome-utils-dev · utils-script/jsfunctions.js:17

function addAll(target, source) {
        const errors = [];
        if (target instanceof Map) {
                Array.from(source.entries()).forEach(it => target.has(it[0]) ? target.set(it[0], it[1]) : errors.push(it))
        } else if (target instanceof Set) {
                source.forEach(it => target.has(it[0]) ? target.add(it) : errors.push(it))
        }
        if (errors.length) {
                console.error('addAll() ~ source contains incorrect timestamp', errors);
        }
}


// https://stackoverflow.com/questions/14446511/most-efficient-method-to-groupby-on-an-array-of-objects
const groupBy = (x,f)=>x.reduce((a,b,i)=>((a[f(b,i,x)]||=[]).push(b),a),{});

// https://advancedweb.hu/how-to-use-async-functions-with-array-map-in-javascript/
const mapInGroups = (arr, iteratee, groupSize) => {

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