Regex :: Use A Regular Expression To Extract A Substring?
Feb 24, 2012
so im trying to figure out regular expressions in Flex, but cant for the life of me figure out how to do the following.From the sample below, i need to extract out only "Mike_Mercury".So i have to somehow strip out everything around it with RegExp, or whatever's best. Also, I would need it to work with other samples as well. Im getting this from the reddit api, so id have to extract that same section from a whole bunch of these.
I've written a url validator for a project I am working on. For my requirements it works great, except when the last part for the url goes longer than 22 characters it breaks. My expression:/((https?)://)([^s.]+.)+([^s.]+)(:d+/S+)/i
It expects input that looks like "http(s)://hostname:port/location". When I give it the input: https://demo10:443/111112222233333444445
it works, but if I pass the input https://demo10:443/1111122222333334444455
it breaks. You can test it out easily at[URL].. Oddly, I can't reproduce the problem with just the relevant (I would think) part /(:d+/S+)/i. I can have as many characters after the required / and it works great. Any ideas or known bugs?
I'm trying to find the number of newlines in a string using the Actionscript 3.0 RegExp engine. Using the string.match function and RegExp(" ","g") does not find the newlines in a string which contains newlines. Is there something I need to add to the pattern or something else that I am missing?
give me the Regular Expression that can check if a given string has any HTML code in it, and coming to think of it I would be bothered with <a href="something">something</a> exactly.
I've been struggling with this problem for a while:I have a string containing HTML and I'm using a regular expression to get the characters between the tags. I'm then attempting to apply a TextFormat to those characters.The problem is that I'm using the TextField's "htmlText" property instead of it's "text" property (because I don't want the HTML tags to be visible). So, the character index that's returned from the regular expression is incorrect, when I apply the TextFormat.Here is some sample code which illustrates the problem:
var txt:String = "<b>Sample</b> string with bold text"; var tf:TextField = new TextField(); addChild(tf);
find the suitable regular expression to validate a string that has comma separated numbers, for e.g. '1,2,3' or '111,234234,-09', etc. Anything else should be considered invalid. for e.g. '121as23' or '123-123' is invalid. I suppose this must be possible in Flex using regular expression but I can not find the correct regular expression.
I need a AS3 regular expression that allows me to find/replace in strings like these:
[Code]...
I want to be able to replace the spaces at the beginning (inside the > <) for other character. It shouldn't affect the number of character at the right of the spaces or the attributes in the value1 definition.
I have a situation where I might be getting one or both of a pair of characters and I want to match either.
For example: str = 'cddd a dfsdf b sdfg ab uyeroi'
I want to match any "a" or "b" or "ab". If the "ab" comes together I want to catch it as a single match (not as two matches "a" "b"). If I get "ab" it will always be in that order ("a" will always precede "b")
What I have is: /[ab]|ab/
But I'm not sure if the ab is going to be a stronger match term than the [ab].
Ok perhaps ive bitten off too much here...I know you are not supposed to parse xml/html to regex but the thing is there just arent many other options.Im using AS3.im parsing the source of textflowlayout text to a different format.
string to parse :
< fontFamily=Verdana encoding=unicode fontWeight="bold"> some text < fontFamily=Verdana encoding=unicode > some text < fontFamily=Arial encoding=unicode fontStyle="italic"> some text < fontFamily=Arial encoding=unicode fontWeight="bold" fontStyle="italic"> some text
what i really need is:
< fontname=Verdanabold encoding=unicode> some text < fontname=Verdana encoding=unicode > some text < fontname=Arialitalic encoding=unicode > some text < fontname=Arialbolditalic encoding=unicode > some text
logically i think of it as taking apart the string into substrings
checking if there are fontWeight or fontStyle in the substring
if there is then appending the font name with the weight or style so so that the font name becomes font NameWeightStyle.then rebuilding the string.The font could be any font with variouse styles or weights..so far:
pattern = /<(.*?)>/gixsm; var matches:Object = pattern.exec(str); var finalstring:String = "";[code]...........
I'm creating a chat app and I would like to if someone enters a url that it turn color and turn into a hyperlink. I am not sure how to write the regular expression. I guess the approach would be to check for "http://" or "www." or ".com" ?
I'm trying to create a replace method that allows me to surround parts of a string with tags. I tried this with a regular replace technique (join and split) but thats case sensitive. what i want is:
: "A nice example line"
and replace "Ice" in that line to surround it with bold tags, result:
text: "A n<b>ice</b> example line"
ActionScript Code: var str:String = "A nice example line"; var pattern:RegExp = /(w+)-(w+)/gi; trace(str.replace(pattern, "$2,$1"));
I am trying to understand some basics of Regular Expressions.For just a experiment I wanted to count the total words in a string.var str:String = "hello, this is some text to count the word hello and to check if Hello is ignored by case and if hellow is different";[code]Here i get the array of the values. and using it's length I can use the total number. This works, but the regular expression is not dynamic.[code]
I have a string "4 + x + 5" and i want to change the x to 1x When using a regular expression for x i end up in an endless loop because when the x is changed to 1x, the regular expression finds the x in 1x and applies it to that Is there anyway of making is skip the next character? Here is my code:
Example: "My site is [URL] and yours is [URL]. Is Fred's [URL]? Or is it[URL]? (I thought his site was [URL], but clearly it's not."
This should extract
[URL]
Notes: it should assume that any punctuation following the url is NOT part of the url, e.g. the comma after [URL], is not part of the url. This includes trailing question marks, which I realize in actuality COULD be part of the url. Of course, if a question mark is followed by querystring data, it SHOULD be considered part of the url. Note that urls might be followed by multiple punctuation marks, as in the the case of (Is your url[URL])?
Urls (and their trailing punctuation, if any) will always be followed by a space, a newline/return character -- or they'll be the end of the string being tested.The will be preceded by a whitespace character or, possibly, an open bracket or parenthesis, as in "Please visit my site [URL]." Or they'll come at the beginning of the string.This regexp should work for http, https and ftp.This is for an Actionscript project. I believe that Actionscript uses the same regular-expression engine as Javascript.
I am creating a simple application and wanted to use a function to match any given regular expression to any given string, so I created the following function:
PHP Code:
function validateStr(regexp:RegExp, strVal:String):Boolean{ if(regexp.exec(strVal)==null) return false; else return true; }
But I was wondering, can't I simply replace it with
PHP Code:
function validateStr(regexp:RegExp, strVal:String):Boolean{ return regexp.test(strVal); }
I am relatively new to ActionScript, so I do not know if both would present the same behavior.
Basically what I want to happen is to ignore scenario #2. I know the solution, but I can't seem to nail it. All that needs to happen is to select the http (and everything after that) as long as it's not preceded by a "> or =", but since I don't know a way for RegExp to look backwards, I'm sort of at a loss. Here's hoping that someone has run into this issue before
I am using RegExp to search for character sequences within strings. I was wondering if/what is the proper way to use a string stored in a variable as a regular expression. For example: [code]I'll have to use another string manipulation tool to search for the sequence.
I want the user to input a regular expression, which is then used.
I'm using following at the moment.
PHP Code:
var filterEx = new RegExp(filterTxt.text.split("/")[1], filterTxt.text.split("/")[2]); filterTxt is a textbox, when traceing the pattern is seemingly correct, but i.e.:
I'm trying to setup a RegexpValidator that only accepts a string of alphanumeric characters between 6-30 characters long and requires one number. I'm new to Regular Expressions and everything I've tried seems to keep returning an invalid ValidationRsultEvent.[code]
This time want to know is it possible to use the user input string as part of reqular expression for instant search... I am aiming to add search feature in my game.. Where i m going to have several items available in list... what i am planning is to have a text box from which i will accept user input and perform instant search am still a noob in AS3... so whether using RegExp meet my goal ?
