javascript 实例

数组去重

function unique(arr){
    if(!Array.isArray(arr)){
        console.log('type error!');
        return;
    }
    arr = arr.sort();
    var arr1 = [arr[0]];
    for(var i=1;i<arr.length;i++){
        if(arr[i] !== arr[i-1]) {
            arr1.push(arr[i]);
        }
    }
    return arr1;
}

var arr = [2,8,5,6,0,7,2,6,7,2];

console.log(unique(arr))；

2.打开一个窗口，并给窗口设置特定的样式

window.open("http://www.baidu.com","_blank","toolbar=yes, location=yes, directories=no, status=no, menubar=yes, scrollbars=yes, resizable=no, copyhistory=yes, width=400, height=400");
}

 3.生成uuid

function generateUUID() {
    var d = new Date().getTime();
    if(window.performance && typeof window.performance.now === "function"){
        d += performance.now(); //use high-precision timer if available
    }
    var uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
        var r = (d + Math.random()*16)%16 | 0;
        d = Math.floor(d/16);
        return (c=='x' ? r : (r&0x3|0x8)).toString(16);
    });
    return uuid;
}　　

4.获取cookie

function getCookie(name) {
    var r = document.cookie.match("\\b" + name + "=([^;]*)\\b");
    return r ? r[1] : undefined;
}