add hw2

node_modules/ramda/es/internal/_clone.js

@@ -0,0 +1,68 @@
+import _cloneRegExp from "./_cloneRegExp.js";
+import type from "../type.js";
+/**
+ * Copies an object.
+ *
+ * @private
+ * @param {*} value The value to be copied
+ * @param {Array} refFrom Array containing the source references
+ * @param {Array} refTo Array containing the copied source references
+ * @param {Boolean} deep Whether or not to perform deep cloning.
+ * @return {*} The copied value.
+ */
+
+export default function _clone(value, refFrom, refTo, deep) {
+  var copy = function copy(copiedValue) {
+    var len = refFrom.length;
+    var idx = 0;
+
+    while (idx < len) {
+      if (value === refFrom[idx]) {
+        return refTo[idx];
+      }
+
+      idx += 1;
+    }
+
+    refFrom[idx] = value;
+    refTo[idx] = copiedValue;
+
+    for (var key in value) {
+      if (value.hasOwnProperty(key)) {
+        copiedValue[key] = deep ? _clone(value[key], refFrom, refTo, true) : value[key];
+      }
+    }
+
+    return copiedValue;
+  };
+
+  switch (type(value)) {
+    case 'Object':
+      return copy(Object.create(Object.getPrototypeOf(value)));
+
+    case 'Array':
+      return copy([]);
+
+    case 'Date':
+      return new Date(value.valueOf());
+
+    case 'RegExp':
+      return _cloneRegExp(value);
+
+    case 'Int8Array':
+    case 'Uint8Array':
+    case 'Uint8ClampedArray':
+    case 'Int16Array':
+    case 'Uint16Array':
+    case 'Int32Array':
+    case 'Uint32Array':
+    case 'Float32Array':
+    case 'Float64Array':
+    case 'BigInt64Array':
+    case 'BigUint64Array':
+      return value.slice();
+
+    default:
+      return value;
+  }
+}