JavaScript 常用工具方法

1.数组去重

function dedupe(array) {
  return Array.from(new Set(array));
}

let arr = [3, 5, 2, 2, 5, 5];
let unique = [...new Set(arr)];

 2.获取url参数

        function getQuery(paramName, defaultValue) {
            var reg = new RegExp("(^|&)" + paramName + "=([^&]*)(&|$)"); // 匹配目标参数
            var result = window.location.search.substr(1).match(reg); // 对querystring匹配目标参数
            if (result != null) {
                return decodeURIComponent(result[2]);
            } else {
                return defaultValue;
            }
        }

3.生成36位GUID

       function getGuid() {
            return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
                var r = Math.random() * 16 | 0,
                    v = c == 'x' ? r : (r & 0x3 | 0x8);
                return v.toString(16);
            });
        }