首先，讓我聲明一下，我在寫這篇文章之前花了2個多小時在弄正則表達式。悲~悲~悲~

按照一般的思路，先來看看其他幾個插找方式： 我以字符串

復制代碼 代碼如下:

var str = "eattd gebcat gedat jadu geat beu";

復制代碼 代碼如下:

var exp1 = //bge/w+/ig;

var matchedStr = exp1.exec(str);

while (matchedStr != null && matchedStr.index < str.length) {
if (matchedStr[0] != null) {
inv.innerHTML += "<br>The result is: " + matchedStr[0];
//newStr = newStr.replace(matchedStr[0]);
wordsArr.push(matchedStr[0]);
}
matchedStr = exp1.exec(str);
}

復制代碼 代碼如下:

var exp1 = //w+(at/b)/ig;

復制代碼 代碼如下:

var exp1 = //b(?!ge)/w+/ig;
var wordsArr = new Array();
var matchedStr = exp1.exec(str);

while (matchedStr != null && matchedStr.index < str.length) {
if (matchedStr[0] != null) {
inv.innerHTML += "<br>The result is: " + matchedStr[0];
newStr = newStr.replace(matchedStr[0]);
wordsArr.push(matchedStr[0]);
}
matchedStr = exp1.exec(str);
}

//wordsArr = newStr.split(" ");

for (var i = 0; i < wordsArr.length;) {
if (wordsArr[i] == "undefined") {
wordsArr.splice(i,1);
} else
i++
}

復制代碼 代碼如下:

var exp1 = //w+(?<!at/b)/ig;

復制代碼 代碼如下:

var exp1 = //w+(?!at/b)/ig;

復制代碼 代碼如下:

function RegularExpTest() {
var inv = document.getElementById("RegexTest");
var str = "eattd gedbcat gedat jadu geat beu";
var newStr = str;
var exp1 = //w+at/b/ig;
var wordsArr = new Array();
var matchedStr = exp1.exec(str);

while (matchedStr != null && matchedStr.index < str.length) {
if (matchedStr[0] != null) {
inv.innerHTML += "<br>The result is: " + matchedStr[0];
newStr = newStr.replace(matchedStr[0]);
}
matchedStr = exp1.exec(str);
}

wordsArr = newStr.split(" ");

for (var i = 0; i < wordsArr.length;) {
if (wordsArr[i] == "undefined") {
wordsArr.splice(i,1);
} else
i++
}

inv.innerHTML += "<br>The result is: " + wordsArr;
}