piscine-Js/filter.js at master · nemsstyve/piscine-Js · GitHub

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function filter(arr, func) {
    let res = []
    for (let i = 0; i < arr.length; i++) {
        if (func(arr[i], i, arr)) {
            res.push(arr[i])
        }
    }
    return res
}

function reject(arr, func) {
    let res = []
    for (let i = 0; i < arr.length; i++) {
        if (!func(arr[i], i, arr)) {
            res.push(arr[i])
        }
    }
    return res
}

function partition(arr, func) {
    let resTrue = []
    let resFalse = []
    for (let i = 0; i < arr.length; i++) {
        if (func(arr[i], i, arr)) {
            resTrue.push(arr[i])
        }
        if (!func(arr[i], i, arr)) {
            resFalse.push(arr[i])
        }
    }
    let res2x = [resTrue, resFalse]
    return res2x
}
// console.log(partition(onlyNumbers,check1))