Created
November 9, 2018 02:37
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like `array_pluck` on Laravel
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const pluck = ( | |
array: Array<{[key: any]: value: any}>, | |
props: string[], | |
pickedKey: string, | |
): {[valuePickedByKey: any]: {[prop:any]: any}} => { | |
return array.reduce((prevOut, item) => { | |
const valuePickedByKey = item[pickedKey]; | |
const pickedObj = props.reduce((prevItem, pickProp) => { | |
return { | |
...prevItem, | |
[pickProp]: item[pickProp] | |
}; | |
}, {}); | |
return { | |
...prevOut, | |
[valuePickedByKey]: pickedObj, | |
} | |
, {}); | |
}; | |
const arr = [ | |
{ id: 1, fruit: "banana", color: "yellow", count: 4}, | |
{ id: 2, fruit: "apple", color: "red", count, 0}, | |
]; | |
const plucked = pluck(arr, ["fruit", "color"], "id"); | |
console.log(plucked); | |
// { | |
// 1: {fruit: "banana", color: "yellow"}, | |
// 2: {fruit: "apple", color: "red"}, | |
// } |
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