new

src/algorithm/new.js

@@ -0,0 +1,42 @@
+//实现(5).add(3).minus(2)功能
+Number.prototype.add = function(m){
+    return this.valueOf()+m
+}
+
+Number.prototype.minus = function(m){
+    return this.toString()*1-m
+}
+
+console.log((5).add(3).minus(2))
+
+//实现add(1)(2)(3)
+function add(m){
+    let fn = function(n){
+        return add(m+n)
+    }
+
+    fn.toString = function(){
+        return m
+    }
+
+    return fn
+}
+console.log(add(1)(2)(3))
+
+//简述一下new一个对象的过程
+function _new(fn,args){
+    let p = Object.create(fn.prototype)
+    let o = fn.apply(p,args)
+    return typeof o ==="object" ? o :p
+}
+
+function a(name){
+    this.name = name
+}
+
+a.prototype.sayname = function(){
+    console.log(this.name)
+}
+
+let dog = _new(a,["dog"])
+dog.sayname()

src/index.js

@@ -1,4 +1,5 @@
 // import {bubbleSort} from '@/algorithm/bubbleSort'
 // import '@/algorithm/problem190612'
 // import '@/algorithm/problem190603'
-import '@/algorithm/problem190619'
+// import '@/algorithm/problem190619'
+import '@/algorithm/new'