Regex練習器

來源:互聯網
上載者:User
正則 Regex的用途很廣泛,但要熟練掌握就不是一件容易的事情了。為此,我編寫了這個練習器用來協助學習。
請多指教!

*********將以下代碼複製到 RegExp.htm 即可 **********
<HTML>
<HEAD>
<TITLE>Regex練習器</TITLE>
<meta name = 安徽 池州 統計局 徐祖寧 e-mail:czjsz@stats.gov.cn>
<script language="JavaScript">
function OnMove() {
window.status = "("+window.event.clientX+","+window.event.clientY+")" + " :: "+document.location
}
</script>

<SCRIPT LANGUAGE="JavaScript1.2">
var re = new RegExp() //建立Regex對象
var nextpoint = 0 //匹配時的位移量
//設定Regex
function setPattern(form) {
var mode
if(form.chkmode.checked) mode = "gi" //i:不分大小寫 g:全域,好象沒什麼作用
else mode = "g"
re.compile(form.regexp.value,mode)
nextpoint = 0
form.reglist.value = ""
}
//檢查是否有匹配
function findIt(form) {
setPattern(form)
var input = form.main.value
if (input.search(re) != -1) {
form.output[0].checked = true
} else {
form.output[1].checked = true
}
}
//檢查匹配位置
function locateIt(form) {
setPattern(form)
var input = form.main.value
form.offset.value = input.search(re)
}
//檢查所有的匹配情況
function execIt(form) {
if(nextpoint == 0 || ! form.scankmode.checked) {
findIt(form)
form.reglist.value = ""
}
var key = true
if(form.scankmode.checked) key = false
do {
var input = form.main.value
var matchArray = re.exec(input.substr(nextpoint))
if(matchArray) {
for(var i=1;i<matchArray.length;i++)
matchArray[i] = "$"+i+":"+matchArray[i]
form.reglist.value = (nextpoint+matchArray.index)+" => " + matchArray[0] +"\n"+form.reglist.value
form.matchlist.value = "$0:"+matchArray.join("\n")
nextpoint = nextpoint + matchArray.index + matchArray[0].length
}else {
if(!key)
form.reglist.value = "沒有找到\n" + form.reglist.value
form.matchlist.value = " "
nextpoint = 0
key = false
}
}while (key)
}
//設定當前使用的Regex
function setregexp(n) {
var s = document.all.regexplist.value.split("\r\n")
document.all.regexp.value = s[n*2-1] //.replace("\r","")
nextpoint = 0
}

//定義選擇監視
var isNav = (navigator.appName == "Netscape")
function showSelection() {
if (isNav) {
var theText = document.getSelection()
} else {
var theText = document.selection.createRange().text
}
if(theText.length>0 && document.all.selechkmode.checked)
document.all.regexp.value = theText
}
if (isNav) {
document.captureEvents(Event.MOUSEUP)
}
document.onmouseup = showSelection
</SCRIPT>

</HEAD>
<BODY style="font-size=9pt;" OnMouseMove=OnMove()>
<FORM><table width=100% cellspacing=0 cellpadding=0><tr><td><font color=red>正規運算式練習器</font></td><td align=right><a href=mailto:czjsz_ah@stats.gov.cn>czjsz_ah@stats.gov.cn</a></td></tr></table>
<table width=100% broder=1 frame=above rules=none style="font-size:9pt;">
<tr><td width=50% valign=top>
輸入一些被尋找的本文:<BR>
<TEXTAREA NAME="main" COLS=58 ROWS=5 WRAP="virtual" style="font-size:9pt;">
09-11-2001 09/11/2001 czjsz_ah@stats.gov.cn
asdff 12345 196.168.1.3 www.sohu.com ftp://www.chinaasp.com 2001.9.11 http://www.active.com.cn/club/bbs/bbsView.asp http://www.163.com/inden.htm
</TEXTAREA><BR>
進行匹配的正規運算式:  忽略大小寫<INPUT TYPE="checkbox" NAME="chkmode" checked style="font-size:8pt;height:18px"><BR>
<TEXTAREA NAME="regexp" COLS=51 ROWS=5 style="font-size:9pt;"></TEXTAREA>
<INPUT TYPE="button" VALUE="清除" onClick="this.form.regexp.value=''" style="font-size:8pt;height:18px"><BR>
<INPUT TYPE="button" VALUE="能找到嗎?[regexObject.test(string)]" style="font-size:8pt;width:70%;height:18px" onClick="findIt(this.form)">
<INPUT TYPE="radio" NAME="output" style="font-size:8pt;height:18px">Yes
<INPUT TYPE="radio" NAME="output" style="font-size:8pt;height:18px">No <BR>
<INPUT TYPE="button" VALUE="在哪裡?[string.search(rege



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