33 lines
1.2 KiB
JavaScript
33 lines
1.2 KiB
JavaScript
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//#region src/object/pickBy.ts
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/**
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* Creates a new object composed of the properties that satisfy the predicate function.
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*
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* This function takes an object and a predicate function, and returns a new object that
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* includes only the properties for which the predicate function returns true.
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*
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* @template T - The type of object.
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* @param {T} obj - The object to pick properties from.
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* @param {(value: T[keyof T], key: keyof T) => boolean} shouldPick - A predicate function that determines
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* whether a property should be picked. It takes the property's key and value as arguments and returns `true`
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* if the property should be picked, and `false` otherwise.
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* @returns {Partial<T>} A new object with the properties that satisfy the predicate function.
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*
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* @example
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* const obj = { a: 1, b: 'pick', c: 3 };
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* const shouldPick = (value) => typeof value === 'string';
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* const result = pickBy(obj, shouldPick);
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* // result will be { b: 'pick' }
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*/
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function pickBy(obj, shouldPick) {
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const result = {};
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const keys = Object.keys(obj);
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for (let i = 0; i < keys.length; i++) {
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const key = keys[i];
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const value = obj[key];
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if (shouldPick(value, key)) result[key] = value;
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}
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return result;
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}
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//#endregion
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export { pickBy };
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