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// 去掉两边的空格和空行
function strip(s){
return stripRight(stripLeft(s));
}
//去掉左边的空格和空行
function stripLeft(s){
if(s == null) return "";
return s.replace(/^[\s\t\n\r]+/,"");
}
//去掉右边的空格和空行
function stripRight(s){
if(s == null) return "";
return s.replace(/[\s\t\n\r]+$/,"");
}
// 判断结尾的字符串
function endswith(origin, value){
let real = origin.substr(origin.length - value.length, value.length);
return real === value
}
// 判断开始的字符串
function startswith(origin, value){
let real = origin.substr(0, value.length);
return real === value
}
// 替换所有指定字符串为指定字符串
function replaceAll(string, key, value){
return string.replace(new RegExp(key,'g'), value);
}