🎨 update: cloneFunction

Author: ConardLi

JavaScript/浅拷贝和深拷贝.md

@@ -40,6 +40,7 @@ const stringTag = '[object String]';
 const symbolTag = '[object Symbol]';
 const errorTag = '[object Error]';
 const regexpTag = '[object RegExp]';
+const funcTag = '[object Function]';
 
 const deepTag = [mapTag, setTag, arrayTag, objectTag, argsTag];
 
@@ -78,6 +79,28 @@ function cloneReg(targe) {
     return result;
 }
 
+function cloneFunction(func) {
+    const bodyReg = /(?<={)(.|\n)+(?=})/m;
+    const paramReg = /(?<=\().+(?=\)\s+{)/;
+    const funcString = func.toString();
+    if (func.prototype) {
+        const param = paramReg.exec(funcString);
+        const body = bodyReg.exec(funcString);
+        if (body) {
+            if (param) {
+                const paramArr = param[0].split(',');
+                return new Function(...paramArr, body[0]);
+            } else {
+                return new Function(body[0]);
+            }
+        } else {
+            return null;
+        }
+    } else {
+        return eval(funcString);
+    }
+}
+
 function cloneOtherType(targe, type) {
     const Ctor = targe.constructor;
     switch (type) {
@@ -91,6 +114,8 @@ function cloneOtherType(targe, type) {
             return cloneReg(targe);
         case symbolTag:
             return cloneSymbol(targe);
+        case funcTag:
+            return cloneFunction(targe);
         default:
             return null;
     }
@@ -145,9 +170,4 @@ function clone(target, map = new WeakMap()) {
 
     return cloneTarget;
 }
-
-module.exports = {
-    clone
-};
-
 ```

docs/JavaScript/浅拷贝和深拷贝.md

@@ -40,6 +40,7 @@ const stringTag = '[object String]';
 const symbolTag = '[object Symbol]';
 const errorTag = '[object Error]';
 const regexpTag = '[object RegExp]';
+const funcTag = '[object Function]';
 
 const deepTag = [mapTag, setTag, arrayTag, objectTag, argsTag];
 
@@ -78,6 +79,28 @@ function cloneReg(targe) {
     return result;
 }
 
+function cloneFunction(func) {
+    const bodyReg = /(?<={)(.|\n)+(?=})/m;
+    const paramReg = /(?<=\().+(?=\)\s+{)/;
+    const funcString = func.toString();
+    if (func.prototype) {
+        const param = paramReg.exec(funcString);
+        const body = bodyReg.exec(funcString);
+        if (body) {
+            if (param) {
+                const paramArr = param[0].split(',');
+                return new Function(...paramArr, body[0]);
+            } else {
+                return new Function(body[0]);
+            }
+        } else {
+            return null;
+        }
+    } else {
+        return eval(funcString);
+    }
+}
+
 function cloneOtherType(targe, type) {
     const Ctor = targe.constructor;
     switch (type) {
@@ -91,6 +114,8 @@ function cloneOtherType(targe, type) {
             return cloneReg(targe);
         case symbolTag:
             return cloneSymbol(targe);
+        case funcTag:
+            return cloneFunction(targe);
         default:
             return null;
     }
@@ -145,9 +170,4 @@ function clone(target, map = new WeakMap()) {
 
     return cloneTarget;
 }
-
-module.exports = {
-    clone
-};
-
 ```