lyuehh

layout	title	date	comments	categories
post	命令行JSON,CSV数据处理工具简介	2014-01-01 11:03	true	json

简介

json现在是最流行的数据交换格式了,但是在命令行中显示, 查找, 处理, 还是不如纯文本方便, 但是有了下面这些工具, 处理json数据可以易如反掌了。。

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function Foo() {}

// Foo.prototype 是Object的一个实例
console.log(Foo.prototype.__proto__ === Object.prototype);
console.log(Foo.prototype.constructor === Foo);
var f1 = new Foo();

// f1是Foo的一个实例
console.log(f1.__proto__ == Foo.prototype);
console.log(f1.__proto__.constructor === Foo);

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var User = {
  count: 1,

  getCount: function() {
    return this.count;
  }
};

console.log(User.getCount());

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function fun1() {
    var a = 1;
    return function() {
        return a++;
    };
}

var add1 = fun1();
console.log(add1());

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/* global console */

var str = "hello world";

console.log("str: " + str);
console.log();

console.log("slice(3): " + str.slice(3));
console.log("substring(3): " + str.substring(3));
console.log("substr(3): " + str.substr(3));

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//'use strict';
var global = this;

(function() {
    'use strict';

    // object
    (function() {
        var person = {};
        person.name = 'www';

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console.log('1:');
(function() {
    var a = [1,2,3,4];
    console.log(a.length);
    a.length = 2;
    console.log(a);
    a.length = 4;
    console.log(a);
})();

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console.log('1:');
(function() {
    console.log(add(1, 2));
    function add(a, b) {
        return a + b;
    }
})();

console.log('2:');
(function() {

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console.log('1:');
(function() {
    if (true) {
        var a = 'a';
    }
    console.log(a);
    if (false) {
        var b = 'b';
    }
    console.log(b);