CoffeeScript - 赋值运算符
CoffeeScript 支持以下赋值运算符 −
| Sr.No | 运算符和说明 | 示例 |
|---|---|---|
| 1 | = （简单赋值） 将右侧操作数的值赋给左侧操作数 |
C = A + B 会将 A + B 的值赋给 C |
| 2 | += （添加和赋值） 它将右操作数与左操作数相加，并将结果赋给左操作数。 |
C += A 等同于 C = C + A |
| 3 | -= （减法和赋值） 它从左操作数中减去右操作数，并将结果赋给左操作数。 |
C -= A 等同于 C = C - A |
| 4 | *= （乘法和赋值） 它将右操作数与左操作数相乘，并将结果赋给左操作数。 |
C *= A 等同于 C = C * A |
| 5 | /= （除法和赋值） 它将左操作数与右操作数相除，并将结果赋给左操作数。 |
C /= A 等同于 C = C / A |
| 6 | %= （取模和赋值） 它使用两个操作数取模并将结果分配给左操作数。 |
C %= A 等同于 C = C % A |
注意 − 相同的逻辑适用于按位运算符，因此它们将变得像 <<=, >>=, >>=, &=, |= 和 ^=。
示例
以下示例演示了 CoffeeScript 中赋值运算符的用法。 将此代码保存在名为 assignment _example.coffee 的文件中
a = 33 b = 10 console.log "The value of a after the operation (a = b) is " result = a = b console.log result console.log "The value of a after the operation (a += b) is " result = a += b console.log result console.log "The value of a after the operation (a -= b) is " result = a -= b console.log result console.log "The value of a after the operation (a *= b) is " result = a *= b console.log result console.log "The value of a after the operation (a /= b) is " result = a /= b console.log result console.log "The value of a after the operation (a %= b) is " result = a %= b console.log result
打开命令提示符并编译.coffee 文件，如下所示。
c:/> coffee -c assignment _example.coffee
在编译时，它会提供以下 JavaScript。
// Generated by CoffeeScript 1.10.0
(function() {
var a, b, result;
a = 33;
b = 10;
console.log("The value of a after the operation (a = b) is ");
result = a = b;
console.log(result);
console.log("The value of a after the operation (a += b) is ");
result = a += b;
console.log(result);
console.log("The value of a after the operation (a -= b) is ");
result = a -= b;
console.log(result);
console.log("The value of a after the operation (a *= b) is ");
result = a *= b;
console.log(result);
console.log("The value of a after the operation (a /= b) is ");
result = a /= b;
console.log(result);
console.log("The value of a after the operation (a %= b) is ");
result = a %= b;
console.log(result);
}).call(this);
现在，再次打开命令提示符 并运行 CoffeeScript 文件，如下所示。
c:/> coffee assignment _example.coffee
执行时，CoffeeScript 文件产生以下输出。
The value of a after the operation (a = b) is 10 The value of a after the operation (a += b) is 20 The value of a after the operation (a -= b) is 10 The value of a after the operation (a *= b) is 100 The value of a after the operation (a /= b) is 10 The value of a after the operation (a %= b) is 0
