I need Regex which matches when my string does not start with "MY" and "BY".
I have tried something like:
r = /^my&&^by/
but it doesn't work for me
eg
mycountry = false ; byyou = false ; xyz = true ;
You could test if the string does not start with by or my, case insensitive.
var r = /^(?!by|my)/i;
console.log(r.test('My try'));
console.log(r.test('Banana'));
without !
var r = /^([^bm][^y]|[bm][^y]|[^bm][y])/i;
console.log(r.test('My try'));
console.log(r.test('Banana'));
console.log(r.test('xyz'));
if you are only concerned with only specific text at the start of the string than you can use latest js string method .startsWith
let str = "mylove";
if(str.startsWith('my') || str.startsWith('by')) {
// handle this case
}
Try This(Regex is NOT case sensitive):
var r = /^([^bm][y])/i; //remove 'i' for case sensitive("by" or "my")
console.log('mycountry = '+r.test('mycountry'));
console.log('byyou= '+r.test('byyou'));
console.log('xyz= '+r.test('xyz'));
console.log('Mycountry = '+r.test('Mycountry '));
console.log('Byyou= '+r.test('Byyou'));
console.log('MYcountry = '+r.test('MYcountry '));
console.log('BYyou= '+r.test('BYyou'));
Related
Using JavaScript & regex I want to split a string on every %20 that is not within quotes, example:
Here%20is%20"a%20statement%20"%20for%20Testing%20"%20The%20Values%20"
//easy to read version: Here is "a statement " for Testing " The Values "
______________ ______________
would return
{"Here","is","a statement ","for","Testing"," The Values "}
but it seems my regex are no longer strong enough to build the expression. Thanks for any help!
A way using the replace method, but without using the replacement result. The idea is to use a closure to fill the result variable at each occurence:
var txt = 'Here%20is%20"a%20statement%20"%20for%20Testing%20"%20The%20Values%20"';
var result = Array();
txt.replace(/%20/g, ' ').replace(/"([^"]+)"|\S+/g, function (m,g1) {
result.push( (g1==undefined)? m : g1); });
console.log(result);
Just try with:
var input = 'Here%20is%20"a%20statement%20"%20for%20Testing%20"%20The%20Values%20"',
tmp = input.replace(/%20/g, ' ').split('"'),
output = []
;
for (var i = 0; i < tmp.length; i++) {
var part = tmp[i].trim();
if (!part) continue;
if (i % 2 == 0) {
output = output.concat(part.split(' '));
} else {
output.push(part);
}
}
Output:
["Here", "is", "a statement", "for", "Testing", "The Values"]
I wondering how should be the regex string for the string containig '#'
e.g.
abc#def#ghj#ijk
I wanna get
#def
#ghj
#ijk
I tried #[\S]+ but it selects the whole #def#ghj#ijk Any ideas ?
Edit
The code below selects only #Me instead of #MessageBox. Why ?
var m = new RegExp('#[^\s#]+').exec('http://localhost/Lorem/10#MessageBox');
if (m != null) {
var s = '';
for (i = 0; i < m.length; i++) {
s = s + m[i] + "\n";
}
}
Edit 2
the double backslash solved that problem. '#[^\\s#]+'
Try #[^\s#]+ to match # followed by a sequence of one or mor characters which are neither # nor whitespace.
Match all characters that are not #:
#[^#]+
I have an function in ASP VB. and I need to replace the exact word in it. For example I have an string like "wool|silk/wool|silk". I want to replace just silk and not silk/wool.
' "|" is a devider
cur_val = "wool|silk/wool|silk"
cur_val_spl = Split("wool|silk/wool|silk", "|")
key_val = "silk"
For Each i In cur_val_spl
If i = key_val Then
cur_val = Replace(cur_val, ("|" & i), "")
cur_val = Replace(cur_val, i, "")
End If
Next
Response.Write(cur_val)
In this case my result would be "wool/wool" but what I really want is this "wool|silk/wool".
I really appreciate any help.
You should build a new string as you go
' "|" is a devider
cur_val = "wool|silk/wool|silk"
cur_val_spl = Split("wool|silk/wool|silk", "|")
result = ""
key_val = "silk"
addPipe = false
For Each i In cur_val_spl
If i <> key_val Then
if addPipe then
result = result & "|"
else
addPipe = true
end if
result = result & i
End If
Next
Response.Write(result)
you could do it with a regular expression but this is shorter
cur_val = "wool|silk/wool|silk"
Response.Write left(mid(replace("|"&cur_val&"|","|wool|","|silk|"),2),len(cur_val))
'=>silk|silk/wool|silk
Too bad you allready accepted the other answer 8>)
I have the following string:
str1 = "cat-one,cat2,cat-3";
OR
str1 = "catone,cat-2,cat3";
OR
str1 = "catone";
OR
str1 = "cat-one";
The point here is words may/may not have "-"s in it
Using regex:
How could I extract the 1st word?
Appreciate any help on this.
Thanks,
L
It's pretty easy, just include allowed characters in brackets:
^([\w\-]+)
An approach not using a regex: assuming the first word is delimited always by a comma "," you can do this:
var str1 = "cat-one";
var i = str1.indexOf(",");
var firstTerm = i == -1 ? str1 : str1.substring(0, i);
Edit: Assumed this was a javascript question, for some reason.
If someone, one day would like to do it in Swift here you go with an extension :
extension String {
func firstWord() -> String? {
var error : NSError?
let internalExpression = NSRegularExpression(pattern: "^[a-zA-Z0-9]*", options: .CaseInsensitive, error: &error)!
let matches = internalExpression.matchesInString(self, options: nil, range:NSMakeRange(0, countElements(self)))
if (matches.count > 0) {
let range = (matches[0] as NSTextCheckingResult).range
return (self as NSString).substringWithRange(range)
}
return nil
}
}
To use it just write:
myString.firstWord()
I'd like to know how to replace each match with a different text?
Let's say the source text is:
var strSource:String = "find it and replace what you find.";
..and we have a regex such as:
var re:RegExp = /\bfind\b/g;
Now, I need to replace each match with different text (for example):
var replacement:String = "replacement_" + increment.toString();
So the output would be something like:
output = "replacement_1 it and replace what you replacement_2";
Any help is appreciated..
You could also use a replacement function, something like this:
var increment : int = -1; // start at -1 so the first replacement will be 0
strSource.replace( /(\b_)(.*?_ID\b)/gim , function() {
return arguments[1] + "replacement_" + (increment++).toString();
} );
I came up with a solution finally..
Here it is, if anyone needs:
var re:RegExp = /(\b_)(.*?_ID\b)/gim;
var increment:int = 0;
var output:Object = re.exec(strSource);
while (output != null)
{
var replacement:String = output[1] + "replacement_" + increment.toString();
strSource = strSource.substring(0, output.index) + replacement + strSource.substring(re.lastIndex, strSource.length);
output = re.exec(strSource);
increment++;
}
Thanks anyway...
leave off the g (global) flag and repeat the search with the appropriate replace string. Loop until the search fails
Not sure about actionscript, but in many other regex implementations you can usually pass a callback function that will execute logic for each match and replace.