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  • 3.commonjs模块

    1.首先建一个math.js

    exports.add = function(a, b){
    	return a + b;
    }
    exports.sub = function(a, b){
    	return a - b;
    }
    exports.mul = function(a, b){
    	return a * b;
    }
    

    2.然后建一个app.js 引人math.js

    var math = require('./math');
    console.log(math);//{ add: [Function], sub: [Function], mul: [Function] }
    var command = process.argv[2];
    var a = Number(process.argv[3]);
    var b = Number([process.argv[4]]);
    var value = math[command](a, b);
    console.log(value);//node app.js mul 1 2 结果为2
    

    CMD运行

    node app.js add 1 2 //3
    node app.js sub 1 2 //-1
    node app.js mul 1 2 //2
    
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  • 原文地址:https://www.cnblogs.com/caijw/p/7257784.html
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