在JavaScript上搜索文字

Question

如何在javascript上搜索文本。

var v=20;
str = "The rain 20 in SPAIN stays mainly in the plain";
var patt1=/ain  v/gi;
var n = str.match(patt1);
alert(n);

我正在嘗試但沒有得到任何結果。 哪里錯了，任何伙伴都可以幫助我。

Answer 1

var v=20;
var str = "The rain 20 in SPAIN stays mainly in the plain";
var patt1=new RegExp("ain " + v, "gi");
var n = str.match(patt1);
alert(n); // alerts 'ain 20'

例

Answer 2

我可能會str.indexOf(findThisString)這一點，因為問題非常廣泛，但你也可以使用str.indexOf(findThisString)

Answer 3

var v = 20; // Variable part of search query
var str = "The rain 20 in SPAIN stays mainly in the plain"; // String to search
var n = str.match('ain ' + v); // The searching, returns null if not found or the matches found. Notice the 'ain' string has been added (this can of course be changed)

if(n != null){ // if not null
   alert(n + ' found!');
}else{ // if null
   alert(v + ' not found...');   
}

我想這會幫到你： http ： //jsfiddle.net/xFeAH/