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54 lines
1.8 KiB
TypeScript
54 lines
1.8 KiB
TypeScript
// Loaded from https://deno.land/x/ramda@v0.27.2/source/evolve.js
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import _curry2 from './internal/_curry2.js';
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import _isArray from './internal/_isArray.js';
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import _isObject from './internal/_isObject.js';
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/**
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* Creates a new object by recursively evolving a shallow copy of `object`,
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* according to the `transformation` functions. All non-primitive properties
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* are copied by reference.
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*
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* A `transformation` function will not be invoked if its corresponding key
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* does not exist in the evolved object.
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*
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* @func
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* @memberOf R
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* @since v0.9.0
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* @category Object
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* @sig {k: (v -> v)} -> {k: v} -> {k: v}
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* @param {Object} transformations The object specifying transformation functions to apply
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* to the object.
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* @param {Object} object The object to be transformed.
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* @return {Object} The transformed object.
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* @example
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*
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* const tomato = {firstName: ' Tomato ', data: {elapsed: 100, remaining: 1400}, id:123};
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* const transformations = {
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* firstName: R.trim,
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* lastName: R.trim, // Will not get invoked.
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* data: {elapsed: R.add(1), remaining: R.add(-1)}
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* };
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* R.evolve(transformations, tomato); //=> {firstName: 'Tomato', data: {elapsed: 101, remaining: 1399}, id:123}
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*/
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var evolve = _curry2(function evolve(transformations, object) {
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if (!_isObject(object) && !_isArray(object)) {
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return object;
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}
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var result = object instanceof Array ? [] : {};
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var transformation, key, type;
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for (key in object) {
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transformation = transformations[key];
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type = typeof transformation;
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result[key] = type === 'function'
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? transformation(object[key])
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: transformation && type === 'object'
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? evolve(transformation, object[key])
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: object[key];
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}
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return result;
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});
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export default evolve;
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