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67 lines
2.3 KiB
TypeScript
67 lines
2.3 KiB
TypeScript
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// Loaded from https://deno.land/x/ramda@v0.27.2/source/constructN.js
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import _curry2 from './internal/_curry2.js';
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import curry from './curry.js';
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import nAry from './nAry.js';
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/**
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* Wraps a constructor function inside a curried function that can be called
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* with the same arguments and returns the same type. The arity of the function
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* returned is specified to allow using variadic constructor functions.
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*
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* @func
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* @memberOf R
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* @since v0.4.0
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* @category Function
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* @sig Number -> (* -> {*}) -> (* -> {*})
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* @param {Number} n The arity of the constructor function.
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* @param {Function} Fn The constructor function to wrap.
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* @return {Function} A wrapped, curried constructor function.
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* @example
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*
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* // Variadic Constructor function
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* function Salad() {
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* this.ingredients = arguments;
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* }
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*
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* Salad.prototype.recipe = function() {
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* const instructions = R.map(ingredient => 'Add a dollop of ' + ingredient, this.ingredients);
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* return R.join('\n', instructions);
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* };
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*
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* const ThreeLayerSalad = R.constructN(3, Salad);
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*
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* // Notice we no longer need the 'new' keyword, and the constructor is curried for 3 arguments.
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* const salad = ThreeLayerSalad('Mayonnaise')('Potato Chips')('Ketchup');
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*
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* console.log(salad.recipe());
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* // Add a dollop of Mayonnaise
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* // Add a dollop of Potato Chips
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* // Add a dollop of Ketchup
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*/
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var constructN = _curry2(function constructN(n, Fn) {
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if (n > 10) {
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throw new Error('Constructor with greater than ten arguments');
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}
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if (n === 0) {
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return function() { return new Fn(); };
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}
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return curry(nAry(n, function($0, $1, $2, $3, $4, $5, $6, $7, $8, $9) {
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switch (arguments.length) {
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case 1: return new Fn($0);
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case 2: return new Fn($0, $1);
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case 3: return new Fn($0, $1, $2);
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case 4: return new Fn($0, $1, $2, $3);
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case 5: return new Fn($0, $1, $2, $3, $4);
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case 6: return new Fn($0, $1, $2, $3, $4, $5);
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case 7: return new Fn($0, $1, $2, $3, $4, $5, $6);
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case 8: return new Fn($0, $1, $2, $3, $4, $5, $6, $7);
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case 9: return new Fn($0, $1, $2, $3, $4, $5, $6, $7, $8);
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case 10: return new Fn($0, $1, $2, $3, $4, $5, $6, $7, $8, $9);
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}
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}));
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});
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export default constructN;
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