I wrote a AS3 script, i have 2 fields to validate, i.e email and name.
For email i use:
function isValidEmail(Email:String):Boolean {
var emailExpression:RegExp = /^[a-z][\w.-]+#\w[\w.-]+\.[\w.-]*[a-z][a-z]$/i;
return emailExpression.test(Email);
}
How about name field? Can you show me some sample code?
EDIT:
Invalid are:
blank
between 4 - 20 characters
Alphanumeric only(special characters not allowed)
Must start with alphabet
I think you probably want a function like this:
function isNameValid(firstname:String):Boolean
{
var nameEx:RegExp = /^([a-zA-Z])([ \u00c0-\u01ffa-zA-Z']){4,20}+$/;
return nameEx.test(firstname);
}
Rundown of that regular expression:
[a-zA-Z] - Checks if first char is a normal letter.
[ \u00c0-\u01ffa-zA-Z'] - Checks if all other chars are unicode characters or a space. So names like "Mc'Neelan" will work.
{4,20} - Makes sure the name is between 4 and 20 chars in length.
You can remove the space at the start of the middle part if you don't want spaces.
Hope this helps. here are my references:
Regular expression validate name asp.net using RegularExpressionValidator
Java - Regular Expressions: Validate Name
function isNameValid(firstname:String):Boolean
{
var nameEx:RegExp = /^([a-zA-Z])([ \u00c0-\u01ffa-zA-Z']){4,20}+$/;
return nameEx.test(firstname);
}
{4,20} instead {2,20}
Problem avoided for names like Ajit
Related
I'm trying to extract the price from the following HTML.
<td>$75.00/<span class='small font-weight-bold text-
danger'>Piece</span></small> *some more text here* </td>
What is the regex expression to get the number 75.00?
Is it something like:
<td>$*/<span class='small font-weight-bold text-danger'>
The dollar sign is a special character in regex, so you need to escape it with a backslash. Also, you only want to capture digits, so you should use character classes.
<td>\$(\d+[.]\d\d)<span
As the other respondent mentioned, regex changes a bit with each implementing language, so you may have to make some adjustments, but this should get you started.
I think you can go with /[0-9]+\.[0-9]+/.
[0-9] matches a single number. In this example you should get the number 7.
The + afterwards just says that it should look for more then just one number. So [0-9]+ will match with 75. It stops there because the character after 5 is a period.
Said so we will add a period to the regex and make sure it's escaped. A period usually means "every character". By escaping it will just look for a period. So we have /[0-9]+\./ so far.
Next we just to add [0-9]+ so it will find the other number(s) too.
It's important that you don't give it the global-flag like this /[0-9]+\.[0-9]+/g. Unless you want it to find more then just the first number/period-combination.
There is another regex you can use. It uses the parentheses to group the part you're looking for like this: /<td>\$(.+)<span/
It will match everything from <td>$ up to <span. From there you can filter out the group/part you're looking for. See the examples below.
// JavaScript
const text = "<td>$something<span class='small font-weight..."
const regex = /<td>\$(.+)<span/g
const match = regex.exec(text) // this will return an Array
console.log( match[1] ) // prints out "something"
// python
text = "<td>$something<span class='small font-weight..."
regex = re.compile(r"<td>\$(.+)<span")
print( regex.search(text).group(1) ) // prints out "something"
As an alternative you could use a DOMParser.
Wrap your <td> inside a table, use for example querySelector to get your element and get the first node from the childNodes.
That would give you $75.00/.
To remove the $ and the trailing forward slash you could use slice or use a regex like \$(\d+\.\d+) and get the value from capture group 1.
let html = `<table><tr><td>$75.00/<span class='small font-weight-bold text-
danger'>Piece</span></small> *some more text here* </td></tr></table>`;
let parser = new DOMParser();
let doc = parser.parseFromString(html, "text/html");
let result = doc.querySelector("td");
let textContent = result.childNodes.item(0).nodeValue;
console.log(textContent.slice(1, -1));
console.log(textContent.match(/\$(\d+\.\d+)/)[1]);
I am trying to build a regex for lex that match the bold text in mardown syntax. For example: __strong text__ I thought this:
__[A-Za-z0-9_ ]+__
And then replace the text by
<strong>Matched text</strong>
But in Lex, this rule causes the variable yytext to be __Matched Text__. How could I get rid of the underscores? It would be better to create a regex that does not match the underscores or proccess the variable yytext to remove it?
With capturing groups it would be easer, because I would only need the regex:
__([A-z0-9 ]+)__
And use \1. But Lex does not support capturing groups.
Answer
I finally take the first option offer by João Neto, but a little modified:
yytext[strlen(yytext)-len]='\0'; // exclude last len characters
yytext+=len; // exclude first len characters
I've tried with Start conditions as he mentioned as second option, but did not work.
You can process yytext by removing the first and last two characters.
yytext[strlen(yytext)-2]='\0'; // exclude last two characters
yylval.str = &yytext[2]; // exclude first two characters
Another option is to use stack
%option stack
%x bold
%%
"__" { yy_push_state(bold); yylval.str = new std::string(); }
<bold>"__" { yy_pop_state(); return BOLD_TOKEN; }
<bold>.|\n { yylval.str += yytext; }
I'm trying to use a regex expression in AS3/Flex4.6 to check for passwords meeting the following criteria:
Between 6 and 15 characters
Must contain at least one lower case letter
Must contain at least one upper case letter
Must contain at least one number (e.g 0-9)
So far, here is what I'm using:
<mx:RegExpValidator source="{loginPwd}" property="text"
expression="^\w*(?=\w*\d)(?=\w*[a-z])(?=\w*[A-Z])\w*$"
valid="rh(event);" invalid="rh(event);"/>
It does everything except catch password length of 6 to 15 characters. I could use a StringValidator to do this, but I'd rather have the RegExpValidator do both (so that I don't have the situation where multiple error messages are displayed for one TextInput field, e.g. one for each validator).
I've tried the following regex expressions, but while they compile, they do not work (for example, aaAA33 doesn't pass).
expression="((?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{6,15})"
expression="(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{6,15}"
expression="(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{6,15}^$"
expression="^.*(?=.{6,15})(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).*$"
I tried your expression with my Regex testtool on the mac
"((?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{6,15})" - works
"^.*(?=.{6,15})(?=.*\\d)(?=.*[a-z])(?=.*[A-Z]).*$" - works
works like intended.
Did you try to match the string with a normal actionscript regex pattern? I did.
public function runTest():void
{
var testArray:Array = ["aaBB99","aaaaa99","AAAAAAA","A3b","A3bdsdsdsd"];
var reg:RegExp = new RegExp("^.*(?=.{6,15})(?=.*\\d)(?=.*[a-z])(?=.*[A-Z]).*$");
for each ( var value:String in testArray )
{
trace(value.match(reg));
}
}
the output was:
[trace] aaBB99
[trace] null
[trace] null
[trace] null
[trace] A3bdsdsdsd
See no problem here
I have this function in my website.
function autolink($content) {
$pattern = "/>>[0-9]/i" ;
$replacement = ">>$0";
return preg_replace($pattern, $replacement, $content, -1);
This is for making certain characters into a clickable hyperlink.
For example, (on a thread) when a user inputs '>>4' to denote to the another reply number 4, the function can be useful.
But it's not working. the characters are not converted into a hyperlink. They just remain as plain text. Not clickable.
Could someone tell me what is wrong with the function?
So the objective is to convert:
This is a reference to the >>4 reply
...into:
This is a reference to the >>4 reply
...where ">" is the HTML UTF-8 equivalent of ">". (remember, you don't want to create HTML issues)
The problems: (1) you forgot to escape the quotes in the replacement (2) since you want to isolate the number, you need to use parentheses to create a sub-pattern for later reference.
Once you do this, you arrive at:
function autolink($contents) {
return preg_replace( "/>>([0-9])/i",
">>$1",
$contents,
-1
);
}
Good luck
In action script var x:String="123abc" I have to check any character, for that string.
i.e. here "abc" is that string so I give an alert that this string should contain only numbers.
How can I do that?
Do you mean to say that you would like to dispatch an alert if a string contains letters
var testVar:String = '123abc';
var pattern:RegExp = /[a-zA-Z]/g;
if( testVar.search(pattern) == -1 )
{
//all good there's no letters in here
}
else
{
//Alert, alert, letter detected!
}
the "pattern" variable is a RegularExpression that's adaptable. Here I'm only checking for letters... If you need more control, get more info about RegularExpressions or come back here with the specific filter you'd like to implement.
I think you are looking for Regular Expression support in AS3.
If the user is inputting text via a TextField then you can set the restrict property to limit the characters that can be entered into the textfield:
textFieldInstance.restrict = "0-9";
TextField.restrict documentation:
http://livedocs.adobe.com/flex/3/langref/flash/text/TextField.html#restrict