Shortcoming--The regular expression of the exercise device
Source: Internet
Author: User
Regular expressions are widely used, but mastering them is not an easy task. To this end, I have written this practice device to help learn.
Please advise more!
Copy the following code to regexp.htm **********
<HTML>
<HEAD>
<TITLE> Regular Expression Practitioners </TITLE>
<meta name = Anhui Chizhou Bureau of Statistics Xu Zuning 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 ()//Create regular Expression object
var nextpoint = 0//offset at match
Set Regular expression
function Setpattern (form) {
var mode
if (form.chkmode.checked) mode = "GI"//i: no case g: Overall, it doesn't seem to work.
else mode = "G"
Re.compile (Form.regexp.value,mode)
Nextpoint = 0
Form.reglist.value = ""
}
Check if there is a match
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
}
}
Check for matching locations
function Locateit (form) {
Setpattern (Form)
var input = Form.main.value
Form.offset.value = Input.search (re)
}
Check for all matching cases
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