简单来说,new只是分配内存,不初始化内存; 而make即分配又初始化内存。所谓的初始化就是给类型赋初值,比如字符为空,整型为0, 逻辑值为false等。 new 先看下new函数的定义 // The new built-in function allocates memory. The first argument is a type,// not a value, and the value returned is a po...
简单来说,new只是分配内存,不初始化内存; 而make即分配又初始化内存。所谓的初始化就是给类型赋初值,比如字符为空,整型为0,逻辑值为false等。 new 先看下new函数的定义 // The new built-in function allocates memory. The first argument is a type,// not a value, and the value returned is a poin...
Go make channel In the following example, we use themakefunction to create a channel. A channel is an object through which goroutines communicate. main.go package main import ( "fmt" ) func fib(n int, c chan int) { x, y := 0, 1 for i := 0; i < n; i++ { c <- x x,...
Go语言中的内建函数new和make是两个用于内存分配的原语(allocation primitives),其功能相似,却有本质区别。 1、new 官方文档 1 2 3 4 5 // The new built-in function allocates memory. The first argument is a type, // not a value, and the value returned is a pointer to a newly // ...
// The new built-in function allocates memory. The first argument is a type, // not a value, and the value returned is a pointer to a newly // allocated zero value of that type. func new(Type) *Type 如源码的英文注释所示,new函数: 输入:只有一个参数Type,即分配的内存里存放的变量是...
我们先看看new的官方定义：func new(Type) *Type The new built-in function allocates memory. The ...
new和make都用于分配内存，但new仅仅是分配了内存，并返回一个指向这块内存的指针；而make则是分配了内存...
golang 中有两个内建函数new, make,用于内存分配与初始化。在面试中这两种内建函数有何不同之处会经常被问到,因此笔者进行下列总结。 1. new(T) new接受一个类型参数,在内存中为类型分配一片初始化后的内存,返回指向该类型的指针。 “The new built-in function allocates memory. The first argument is ...
// The new built-in function allocates memory. The first argument is a type, // not a value, and the value returned is a pointer to a newly // allocated zero value of that type. func new(Type) *Type 它只接受一个参数,这个参数是一个类型,分配好内存后,返回一个指向该类型内存地址的指...
根据GO夜读学习go源码 源码: // The make built-in function allocates and initializes an object of type// slice, map, or chan (only). Like new, the first argument is a type, not a// value. Unlike new, make's return type is the same as the type of its// argument, not a pointer...