牛客网js题库正解（41-60）

function commonParentNode(oNode1, oNode2) {
    for(;oNode1;oNode1 = oNode1.parentNode) {
        console.log(oNode1)
        if (oNode1.contains(oNode2)) {
            return oNode1
        }
    }
}

function bindThis(f, oTarget) {
    return f.bind(oTarget)
}

function namespace(oNamespace, sPackage) {
    const arr = sPackage.split('.');
    let tem = oNamespace;
    arr.forEach(item => {
        const flag = tem[item] instanceof Object
        if(!flag) {
            tem[item] = {};
            tem = tem[item]
        } else {
            tem = tem[item]
        }
    })
    return oNamespace
}

Array.prototype.uniq = function () {
    return [...(new Set(this))]
}

function fibonacci(n) {
    if(n > 0) {
        if(n ===1 || n === 2) {
            return 1
        }else {
            return fibonacci(n - 1 ) + fibonacci(n - 2)
        }
    }
}

function formatDate(t,str){
    var obj = {
    yyyy:t.getFullYear(),
    yy:(""+ t.getFullYear()).slice(-2),
    M:t.getMonth()+1,
    MM:("0"+ (t.getMonth()+1)).slice(-2),
    d:t.getDate(),
    dd:("0" + t.getDate()).slice(-2),
    H:t.getHours(),
    HH:("0" + t.getHours()).slice(-2),
    h:t.getHours() % 12,
    hh:("0"+t.getHours() % 12).slice(-2),
    m:t.getMinutes(),
    mm:("0" + t.getMinutes()).slice(-2),
    s:t.getSeconds(),
    ss:("0" + t.getSeconds()).slice(-2),
    w:['日', '一', '二', '三', '四', '五', '六'][t.getDay()] 
    };
    return str.replace(/([a-z]+)/ig,function($1){return obj[$1]})
}

function strLength(s, bUnicode255For1) {
    let size = s.length;
    if(bUnicode255For1) return size;
    for(let i = 0; i < s.length; i++) {
        if(s.charCodeAt(i) > 255) size++;
    }
    return size;
}

function isAvailableEmail(sEmail) {
    let reg = /^([\w+\.])+@(\w+)([.]\w+)+$/
    return reg.test(sEmail)
}

function count(arr, item) {
    var j=0;
    arr.forEach(function(e){
        if(e==item)
            j++;
    });
    return j;
}

function duplicates(arr) {
var newArr =[]
        for(var i =0 ;i<arr.length; i++){
          for(var j=i+1;j<arr.length;j++){
              if(arr[i]==arr[j]&&newArr.indexOf(arr[i])==-1){
                newArr.push(arr[i]) 
              }
          }
        }
        return newArr
}

function count(start, end) {
    if(start <= end){
        console.log(start);
        start++;
        st = setTimeout(function(){count(start, end)}, 100);
    }
    return {
        cancel: function(){clearTimeout(st);}
    }
}

function fizzBuzz(num) {
    if(num%3===0 && num%5===0){
        return 'fizzbuzz';
    }else if(num%3===0 && num%5!==0){
        return 'fizz';
    }else if(num%5===0 && num%3!==0){
        return 'buzz';
    }else if(num===null || typeof(num)!== 'number'){
        return false;
    }else{
        return num;
    }

}

function argsAsArray(fn, arr) {
    return fn.apply(this,arr);
}

function speak(fn, obj) {
    return fn.bind(obj)()
}

function functionFunction(str) {
    var f=function(x){
       return str+", "+x
    }
    return f
}

function makeClosures(arr, fn) {
    let newArr=[];
    for(var i =0;i<arr.length;i++){
          newArr[i] = fn.bind(null,arr[i]);
    }
    return newArr;
}

function partial(fn, str1, str2) {
    var result=function(str3){
        return fn(str1,str2,str3)
    }
    return result
}

function useArguments() {
    var num = 0;
    for(var i=0;i<arguments.length;i++){
        num += arguments[i];
    }
    return num;
}

function callIt(fn) {
     return fn.apply(this,[].slice.call(arguments,1));
}