I have the following string of text:
textString1:textString2:textString3:textString4
I'm looking to capture each text string and assign them to variables.
I've somehow managed to come up with the following:
var errorText = 'AAAA:BBBB:CCCC:DDDD';
var subString, intro, host, priority, queue = '';
var re = /(.+?\:)/g;
subString = errorText.match(re);
intro = subString[0];
host = subString[1];
priority = subString[2];
//queue = subString[3];
console.log(intro + " " + host + " " + priority);
JS Bin Link
However, I'm having problems with:
capturing the last group, since there is no : at the end
the variables contain : which I'd like to strip
You don't need a regex for this - just use errorText.split(':') to split by a colon. It will return an array.
And if you then want to add them together with spaces, you could do a simple replace instead: errorText.replace(/:/g,' ').
use split method for this.it will return array of string then iterate through array to get string:
var errorText = 'AAAA:BBBB:CCCC:DDDD';
var strArr=errorText.split(':');
console.log(errorText.split(':'));
for(key in strArr){
console.log(strArr[key]);
}
Related
I am trying to create a regular expression in JS which will match the occurences of box and return the full compound word
Using the string:
the box which is contained within a box-wrap has a box-button
I would like to get:
[box, box-wrap, box-button]
Is this possible to match these words only using the string box?
This is what I have tried so far but it does not return the results I desire.
http://jsfiddle.net/w860xdme/
var str ='the box which is contained within a box-wrap has a box-button';
var regex = new RegExp('([\w-]*box[\w-]*)', 'g');
document.getElementById('output').innerHTML=str.match(regex);
Try this way:
([\w-]*box[\w-]*)
Regex live here.
Requested by comments, here is a working example in javascript:
function my_search(word, sentence) {
var pattern = new RegExp("([\\w-]*" + word + "[\\w-]*)", "gi");
sentence.replace(pattern, function(match) {
document.write(match + "<br>"); // here you can do what do you want
return match;
});
};
var phrase = "the box which is contained within a box-wrap " +
"has a box-button. it is inbox...";
my_search("box", phrase);
Hope it helps.
I'll just throw this out there:
(box[\w-]*)+
You can use this regex in JS:
var w = "box"
var re = new RegExp("\\b" + w + "\\S*");
RegEx Demo
This should work, note the 'W' is upper case.
http://www.w3schools.com/jsref/jsref_obj_regexp.asp
\Wbox\W
It looks like you're wanting to use the match with a regex. Match is a string method that will take a regex as an argument and return an array containing matches.
var str = "your string that contains all of the words you're looking for";
var regex = /you(\S)*(?=\s)/g;
var returnedArray = str.match(regex);
//console.log(returnedArray) returns ['you', 'you\'re']
I'm working on a regex that must match only the text inside quotes but not in a comment, my macthes must only the strings in bold
<"love";>
>/*"love"*/<
<>'love'<>
"lo
more love
ve"
I'm stunck on this:
/(?:((\"|\')(.|\n)*?(\"|\')))(?=(?:\/\**\*\/))/gm
The first one (?:((\"|\')(.|\n)*?(\"|\'))) match all the strings
the second one (?=(?:\/\**\*\/)) doesn't match text inside quotes inside /* "mystring" */
bit my logic is cleary wrong
Any suggestion?
Thanks
Maybe you just need to use a negative lookahead to check for the comment end */?
But first, I'd split the string into separate lines
var arrayOfLines = input_str.split(/\r?\n/);
or, without empty lines:
var arrayOfLines = input_str.match(/[^\r\n]+/g);
and then use this regex:
["']([^'"]+)["'](?!.*\*\/)
Sample code:
var rebuilt_string = ''
var re = /["']([^'"]+)["'](?!.*\*\/)/g;
var subst = '<b>$1</b>';
for (i = 0; i < arrayOfLines.length; i++)
{
rebuilt_string = rebuilt_string + arrayOfLines[i].replace(re, subst) + "\r\n";
}
The way to avoid commented parts is to match them before. The global pattern looks like this:
/(capture parts to avoid)|target/
Then use a callback function for the replacement (when the capture group exists, return the match without change, otherwise, replace the match with what you want.
Example:
var result = text.replace(/(\/\*[^*]*(?:\*+(?!\/)[^*]*)*\*\/)|"[^"\\]*(?:\\[\s\S][^"\\]*)*"|'[^'\\]*(?:\\[\s\S][^'\\]*)*'/g,
function (m, g1) {
if (g1) return g1;
return '<b>' + m + '</b>';
});
I want to find a string in an array sql and remove the string. The string would be like:
" specimen.snop_code = ''"
There will be 4 digits between the single qoutes, which could be anything. I was thinking of using regex to find the string.
Tried just using pop() but I need to target the string to be removed from the array. Note that I need to remove all instances of the string. So something like:
disease_filter = new RegExp(" specimen.snop_code = ''", 'g');
for (var i=sql.length-1; i>=0; i--) {
if (sql[i] === disease_filter) {
array.splice(i, 1);
}
}
So how can I make " specimen.snop_code = '*'" into a regular expression with a wildcard as shown between the single quotes?
You can use .replace with a regex as the first parameter:
var input = " specimen.snop_code = 'something'";
var disease_filter = input.replace(/'(.*)'/gi, "'other stuff'");
// disease_filter is now "specimen.snop_code = 'other stuff'"
edit: removed unneccesary escaping as commented.
I'm trying to split a string into an array based on the second occurrence of the symbol _
var string = "this_is_my_string";
I want to split the string after the second underscore. The string is not always the same but it always has 2 or more underscores in it. I always need it split on the second underscore.
In the example string above I would need it to be split like this.
var split = [this_is, _my_string];
var string = "this_is_my_string";
var firstUnderscore = string.indexOf('_');
var secondUnderscore = string.indexOf('_', firstUnderscore + 1);
var split = [string.substring(0, secondUnderscore),
string.substring(secondUnderscore)];
Paste it into your browser's console to try it out. No need for a jsFiddle.
var string = "this_is_my_string";
var splitChar = string.indexOf('_', string.indexOf('_') + 1);
var result = [string.substring(0, splitChar),
string.substring(splitChar, string.length)];
This should work.
var str = "this_is_my_string";
var matches = str.match(/(.*?_.*?)(_.*)/); // MAGIC HAPPENS HERE
var firstPart = matches[1]; // this_is
var secondPart = matches[2]; // _my_string
This uses regular expressions to find the first two underscores, and captures the part up to it and the part after it. The first subexpression, (.*?_.*?), says "any number of characters, an underscore, and again any number of characters, keeping the number of characters matched as small as possible, and capture it". The second one, (_.*) means "match an underscore, then any number of characters, as much of them as possible, and capture it". The result of the match function is an array starting with the full matched region, followed by the two captured groups.
I know this post is quite old... but couldn't help but notice that no one provided a working solution. Here's one that works:
String str = "this_is_my_string";
String undScore1 = str.split("_")[0];
String undScore2 = str.split("_")[1];
String bothUndScores = undScore1 + "_" + undScore2 + "_";
String allElse = str.split(bothUndScores)[1];
System.out.println(allElse);
This is assuming you know there will always be at least 2 underscores - "allElse" returns everything after the second occurrence.
I have a json array that I currently search through by flipping a boolean flag:
for (var c=0; c<json.archives.length; c++) {
if ((json.archives[c].archive_num.toLowerCase().indexOf(query)>-1)){
inSearch = true;
} }
And I have been trying to create a wildcard regex search by using a special character '*' but I haven't been able to loop through the array with my wildcard.
So what I'm trying to accomplish is when query = '199*', replace the '*' with /[\w]/ and essentially search for 1990,1991,1992,1993,1994 + ... + 199a,199b, etc.
All my attempts turn literal and I end up searching '199/[\w]/'.
Any ideas on how to create a regex wildcard to search an array?
Thanks!
You should write something like this:
var query = '199*';
var queryPattern = query.replace(/\*/g, '\\w');
var queryRegex = new RegExp(queryPattern, 'i');
Next, to check each word:
if(json.archives[c].archive_num.match(queryRegex))
Notes:
Consider using ? instead of *, * usually stands for many letters, not one.
Note that we have to escape the backslash so it will create a valid string literal. The string '\w' is the same as the string w - the escape is ignored in this case.
You don't need delimiters (/.../) when creating a RegExp object from a string.
[\w] is the same as \w. Yeah, minor one.
You can avoid partial matching by using the pattern:
var queryPattern = '\\b' query.replace(/\*/g, '\\w') + '\\b';
Or, similarly:
var queryPattern = '^' query.replace(/\*/g, '\\w') + '$';
var qre = query.replace(/[^\w\s]/g, "\\$&") // escape special chars so they dont mess up the regex
.replace("\\*", "\\w"); // replace the now escaped * with '\w'
qre = new RegExp(qre, "i"); // create a regex object from the built string
if(json.archives[c].archive_num.match(qre)){
//...
}