kiinlam

// toString(radix)
// 任意数值转为指定进制
0x6600.toString(2) // "110011000000000"

// parseInt(value, radix)
// 将value作为指定进制radix来解析，得到10进制结果
parseInt("110011000000000",2) // 26112

// 任意进制相互转换
// 先转10进制，再换成目标进制

kiinlam

const delay = timeout => new Promise(resolve => setTimeout(resolve, timeout));

kiinlam

public long DJBHash(String str)  
   {  
      long hash = 5381;  
      for(int i = 0; i < str.length(); i++)  
      {  
         hash = ((hash << 5) + hash) + str.charAt(i);  
      }  
      return hash;  
   } 

kiinlam

/**
    A string hashing function based on Daniel J. Bernstein's popular 'times 33' hash algorithm.
    @param {string} text - String to hash
    @return {number} Resulting number.
*/
function hash(text) {
    'use strict';

    var hash = 5381,
        index = text.length;

kiinlam

n.copy = function(e, n, o) {
        var c = d('<span class="my-gallery-src-copy-hidden">' + e + "</span>")
          , s = d("body");
        s.append(c);
        var a = document.createRange();
        a.selectNode(c.get(0));
        var i = window.getSelection();
        i.removeAllRanges(),
        i.addRange(a);
        var t = document.execCommand("copy");

kiinlam

// js 里 \x 开头的通常是16进制编码的数据，下面代码实现编解码：

// 解码
//eg.
//decode('\x5f\x63\x68\x61\x6e\x67\x65\x49\x74\x65\x6d\x43\x72\x6f\x73\x73\x4c\x61\x79\x65\x72')
//"_changeItemCrossLayer"
function decode(str){
    return str.replace(/\\x(\w{2})/g,function(_,$1){ return String.fromCharCode(parseInt($1,16)) });
}

kiinlam

npm config set registry https://registry.npm.taobao.org

或修改~/.npmrc文件(没有就自行新建一个)，写入registry = https://registry.npm.taobao.org

配置后可通过下面方式来验证是否成功

npm config get registry

kiinlam

function combine(arr, num) {
    var r = [];
    (function f(t, a, n) {
        if (n == 0) return r.push(t);
        for (var i = 0, l = a.length; i <= l - n; i++) {
            f(t.concat(a[i]), a.slice(i + 1), n - 1);
        }
    })([], arr, num);
    return r;
}

kiinlam

// 适用于处理二维数组: ([['a','b'],['c'],['d']],2) --> [[["a","b"],["c"]],[["a","b"],["d"]],[["c"],["d"]]]
function dp_combine(a, m) {
    var t = [[]], r = [];
    for (var i = 0, n = a.length; i < n; ++i) {
        for (var j = 0, l = t.length; j < l; ++j) {
            (t[j].length < m - 1 ? t : r).push(t[j].concat([a[i]]));
        }
    }
    return r;
}

kiinlam

//es5
function add(a, b) {
  return a + b;
}
var curriedAdd = _.curry(add);
var add2 = curriedAdd(2);
add2(1);// 3


//es6