JavaScript检查子字符串是否在字符串中的方法
本文实例讲述了JavaScript检查子字符串是否在字符串中的方法。分享给大家供大家参考，具体如下：
varstrnew="HelloRaghuHowareu"
//Checkingexistenceinentirestring
if(strnew.indexOf("Raghu")!=-1)
{
alert("Exists");
}
/*
Checkingexistenceattheendofstring
Forexample,variableresult1inthefollowingexampleisassigned
thevalueoftruebecausetheword"Ishmael"appearsattheendof
thestring.Variableresult2isassignedavalueoffalsebecause
"Raghu"doesn'tappearattheendofthestring.
*/
result1=/Raghu$/.test("CallmeRaghu");
result2=/Raghu$/.test("CallmeRaghu.Someyearsago");
/*
Checkingexistenceinthebeginingofstring
Inthefollowingexample,variableresult1isassignedthevalue
oftruebecausetheword"Birds"appearsatthebeginningofthe
string.Variableresult2isassignedthevalueoffalsebecause
"Birds"doesn'tappearatthebeginningofthestring.
*/
result1=/^Birds/.test("Birdsfly");
result2=/^Birds/.test("BigBirdsfly");
更多关于JavaScript相关内容感兴趣的读者可查看本站专题：《JavaScript查找算法技巧总结》及《JavaScript数据结构与算法技巧总结》
希望本文所述对大家JavaScript程序设计有所帮助。