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[go] javascript regular expressions extract numbers using

Source: Internet
Author: User
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Briefly:

Test the JS regular expression function match

Used to pick a number other than 0 from a string, put it in an array, and then output after join (', ').

Knowledge Points:

1. Use the match function to extract all the numbers in a string

The G in Reg returns all matches, and returns the first matching item if no G is added

2. If there is no match, a null list is returned

Code:

<!DOCTYPE HTML><HTML><Head>    <Scripttype= "Text/javascript">        functiongetnumlist () {varNums=document.getElementById ("numbers"). Value; varReg= /[1-9][0-9]*/G; varnumlist=Nums.match (REG); if(Numlist== NULL) {document.getElementById ("result"). InnerHTML= "No Legal Number input"; } Else{document.getElementById ("result"). InnerHTML=Numlist.join (","); }        }    </Script></Head><Body>    <P>Get numbers</P>    <inputtype= "text"ID= "Numbers"value= "123" />    <inputtype= "button"value= "Exec"onclick= "getnumlist ()" />    <P>Result<spanID= "Result"></span></P></Body></HTML>

Output:

[go] javascript regular expressions extract numbers using

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