add hw2

node_modules/ramda/es/constructN.js

@@ -0,0 +1,88 @@
+import _curry2 from "./internal/_curry2.js";
+import curry from "./curry.js";
+import nAry from "./nAry.js";
+/**
+ * Wraps a constructor function inside a curried function that can be called
+ * with the same arguments and returns the same type. The arity of the function
+ * returned is specified to allow using variadic constructor functions.
+ *
+ * @func
+ * @memberOf R
+ * @since v0.4.0
+ * @category Function
+ * @sig Number -> (* -> {*}) -> (* -> {*})
+ * @param {Number} n The arity of the constructor function.
+ * @param {Function} Fn The constructor function to wrap.
+ * @return {Function} A wrapped, curried constructor function.
+ * @example
+ *
+ *      // Variadic Constructor function
+ *      function Salad() {
+ *        this.ingredients = arguments;
+ *      }
+ *
+ *      Salad.prototype.recipe = function() {
+ *        const instructions = R.map(ingredient => 'Add a dollop of ' + ingredient, this.ingredients);
+ *        return R.join('\n', instructions);
+ *      };
+ *
+ *      const ThreeLayerSalad = R.constructN(3, Salad);
+ *
+ *      // Notice we no longer need the 'new' keyword, and the constructor is curried for 3 arguments.
+ *      const salad = ThreeLayerSalad('Mayonnaise')('Potato Chips')('Ketchup');
+ *
+ *      console.log(salad.recipe());
+ *      // Add a dollop of Mayonnaise
+ *      // Add a dollop of Potato Chips
+ *      // Add a dollop of Ketchup
+ */
+
+var constructN =
+/*#__PURE__*/
+_curry2(function constructN(n, Fn) {
+  if (n > 10) {
+    throw new Error('Constructor with greater than ten arguments');
+  }
+
+  if (n === 0) {
+    return function () {
+      return new Fn();
+    };
+  }
+
+  return curry(nAry(n, function ($0, $1, $2, $3, $4, $5, $6, $7, $8, $9) {
+    switch (arguments.length) {
+      case 1:
+        return new Fn($0);
+
+      case 2:
+        return new Fn($0, $1);
+
+      case 3:
+        return new Fn($0, $1, $2);
+
+      case 4:
+        return new Fn($0, $1, $2, $3);
+
+      case 5:
+        return new Fn($0, $1, $2, $3, $4);
+
+      case 6:
+        return new Fn($0, $1, $2, $3, $4, $5);
+
+      case 7:
+        return new Fn($0, $1, $2, $3, $4, $5, $6);
+
+      case 8:
+        return new Fn($0, $1, $2, $3, $4, $5, $6, $7);
+
+      case 9:
+        return new Fn($0, $1, $2, $3, $4, $5, $6, $7, $8);
+
+      case 10:
+        return new Fn($0, $1, $2, $3, $4, $5, $6, $7, $8, $9);
+    }
+  }));
+});
+
+export default constructN;