javascript - 在 javascript 上搜索文本

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);

我正在尝试，但没有得到任何结果。我哪里错了，请哪位大哥帮帮我。

Answer 1

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...');   
}

我认为这会对您有所帮助:http://jsfiddle.net/xFeAH/