javascript get string out of parantheses match regex - javascript

I have a full string consisting of something like this [(data1.1)(data1.2)][(data2.1)(data2.1)]
Ive read you can do something smart with match function and regex. I want two arrays with the data loaded out of the parentheses.. How in earth do i do that? Please use my string as example.

I came up with this abomination:
var array = s.replace(/^\[|\]$/g,'').split('][').map(function(a){
return a.replace(/^\(|\)$/g,'').split(')(')
});
http://jsfiddle.net/8kLhc/
Also if you deliberately save or transmit data like this then you should really have a look at JSON or proper database design.

I wasn't entirely sure what you were after, but I'm assuming this
var what = '[(data1.1)(data1.2)][(data2.1)(data2.2)]',
have = [],
you = [],
tried = /\[\(([^)]*)\)\(([^)]*)\)\]/g;
what.replace(tried, function (use, brain, forthis) {
you.push((have.push(brain), forthis));
});
console.log(have, you);
// ["data1.1", "data2.1"] ["data1.2", "data2.2"]

Related

Using Jquery to get numeric value which is in between "/" in link

I am trying to fetch numeric value from link like this.
Example link
/produkt/114664/bergans-of-norway-airojohka-jakke-herre
So I need to fetch 114664.
I have used following jquery code
jQuery(document).ready(function($) {
var outputv = $('.-thumbnail a').map(function() {
return this.href.replace(/[^\d]/g, '');
}).get();
console.log( outputv );
});
https://jsfiddle.net/a2qL5oyp/1/
The issue I am facing is that in some cases I have urls like this
/produkt/114664/bergans-of-norway-3airojohka-3jakke-herre
Here I have "3" inside text string, so in my code I am actually getting the output as "11466433" But I only need 114664
So is there any possibility i can get numeric values only after /produkt/ ?
If you know that the path structure of your link will always be like in your question, it's safe to do this:
var path = '/produkt/114664/bergans-of-norway-airojohka-jakke-herre';
var id = path.split('/')[2];
This splits the string up by '/' into an array, where you can easily reference your desired value from there.
If you want the numerical part after /produkt/ (without limitiation where that might be...) use a regular expression, match against the string:
var str = '/produkt/114664/bergans-of-norway-3airojohka-3jakke-herre';
alert(str.match(/\/produkt\/(\d+)/)[1])
(Note: In the real code you need to make sure .match() returned a valid array before accessing [1])

javascript regex match not working as expected

I'm trying to do something very simple, but I can't get to work the way I intend. I'm sure it's doing exactly what I'm asking it to do, but I'm failing to understand the syntax.
Part 1:
In the following example, I want to extract the part of the string between geotech and Input.
x = "geotechCITYInput"
x.match(/^geotech(.*)(?:Input|List)$/)
The result:
["geotechCITYInput", "CITY"]
I've been writing regex for many years in perl/python and even javascript, but I've never seen the ?: syntax, which, I think, is what I'm supposed to use here.
Part 2:
The higher level problem I'm trying to solve is more complicated. I have a form with many elements defined as either geotechXXXXInput or geotechXXXXList. I want to create an array of XXXX values, but only if the name ends with Input.
Example form definition:
obj0.name = "geotechCITYInput"
obj1.name = "geotechCITYList"
obj2.name = "geotechSTATEInput"
obj3.name = "geotechSTATEList"
I ultimately want an array like this:
["CITY","STATE"]
I can iterate over the form objects easily with an API call, but I can't figure out how to write the regex to match the ones I want. This is what I have right now, but it doesn't work.
geotechForm.forEachItem(function(name) {
if(name.match(/Input$/)
inputFieldNames.push( name.match(/^geotech(.*)Input$/) );
});
Any suggestions would be greatly appreciated.
You were missing the Input and List suffix in your regex. This will match if the name starts with geotech and ends with either Input or List and it will return an array with the text in the middle as the second item in the array.
geotechForm.forEachItem(function (name) {
var match = name.match(/^geotech(.*)(Input|List)$/);
if (match) {
inputFieldNames.push(match[1]);
}
});

Using an array of regex expressions for .match

I have something I am trying to accomplish.
I'd like to take an array built with AJAX/xml.
array[/word0/, /word1/, /word2/]
and put this into a form that could be used in a .match():
result = string.match(array)
I have tried using a for loop and stepping through the array using string.match(array[i]) to no avail.
Is there an easy way to do this?
Edit: You may have a syntax problem. The following is not valid syntax:
array[/word0/, /word1/, /word2/]
Something like this fixes it:
var regexps = [/word0/, /word1/, /word2/];
Original answer:
Javascript RegExps already do this. You're looking for:
var regexp = /word0|word1|word2/;
Assuming your list of matches comes back in the right format, you could achieve this like so:
var words = ["word0", "word1", "word2"];
var regexp = new Regexp(words.join("|"));
str.match(regexp);
http://jsfiddle.net/KALPh/
Your approach was fine. Here's my implementation:
var regexes = [/^def/, /^abc/],
testString = 'abcdef',
numRegexes = regexes.length;
for(var x=0;x<numRegexes;x++) {
alert(regexes[x].test(testString));
}
To initialize your array, use
var array = [/word0/, /word1/, /word2/];
Then you can use
str.match(array[i])
If your problem is the transmission in "AJAX/xml", then you'll need to build the regular expressions client side with new RegExp(somestring) where somestring might for example be "word0" : you can't embed a regex literal in XML.

JS Regex match string with $

I am trying to write something that would look at tweets and pull up info about stocks being mentioned in the tweet. People use $ to reference stock symbols on twitter but I cant escape the $.
I also dont want to match any price mention or anything like that so basically match $AAPL and not $1500
I was thinking it would be something like this
\b\$[a-zA-Z].*\b
if there are multiple matches id like to loop through them somehow so something like
while ((tweet = reg.exec(sym_pat)) !== null) {
//replace text with stock data.
}
This expression gives me an unexpected illegal token error
var symbol_pat = new RegExp(\b\$[a-z]*);
Thanks for the help if you want to see the next issue I ran into
Javascript AJAX scope inside of $.each Scope
Okay, you've stated that you want to replace the matches with their actual stock values. So, you need to get all of the matching elements (stock ticker names) and then for each match you're going to replace the it with the stock value.
The answer will "read" very similarly to that sentence.
Assume there's a tweet variable that is the contents of a particular tweet you're going to work on:
tweet.match(/\b\$[A-Za-z]+\b/g).forEach(function(match) {
// match looks like '$AAPL'
var tickerValue = lookUpTickerValue(match);
tweet.replace(match, tickerValue);
});
This is assuming you have some logic somewhere that will grab the ticker value for the given stock name and then replace it (it should probably return the original value if it can't find a match, so you don't mangle lovely tweets like "Barbara Streisand is $ATAN").
var symbol_pat = new RegExp('\\b\\$[a-z]+\\b','gi');
// or
var symbol_pat = /\b\$[a-z]+\b/gi;
Also, for some reason JS can not calculate the beginning of a word by \b, it just catches the one at the end.
EDIT: If you're replacing the stock symbols you can use the basic replace method by a function and replace that data with predefined values:
var symbol_pat = /(^|\s)(\$[a-z]+\b)/gi;
var stocks = {AAPL:1,ETC:2}
var str = '$aapl ssd $a a$s$etc $etc';
console.log(str);
str = str.replace(symbol_pat, function() {
var stk = arguments[2].substr(1).toUpperCase();
// assuming you want to replace $etc as well as $ETC by using
// the .toUpperCase() method
if (!stocks[stk]) return arguments[0];
return arguments[0].replace(arguments[2],stocks[stk]);
});
console.log(str);

Good way to serialize a list? - Javascript/AJAX

just felt like asking this as there are always jewels popping up on stackoverflow :)
What I have is the following list:
list1 = [['command','arg1','arg2'], ['command2','arg1'], ... ]
How would you recommend to transform it into a string in order to be passed as ONE GET argument?
e.g.
http://webgame_site.com/command_list/?data=...
What I am currently doing is separating lists using commas , ; , but I don't like this idea as the method would break if I decide to introduce these within strings.
I'm trying to be as compact as possible.
One idea I've had is to encode the list into base64:
[['command','arg1','arg2'], ['command2','arg1']]
=> "W1snY29tbWFuZCcsJ2FyZzEnLCdhcmcyJ10sWydjb21tYW5kMicsJ2FyZzEnXV0="
which is shorter than URIencode
Any ideas? :)
Convert it to json then encode the characters using encodeURI.
var list1 = [['command','arg1','arg2'], ['command2','arg1']];
var encoded = encodeURI(JSON.stringify(list1));
alert(encoded);
Edit for base64:
var list1 = [['command','arg1','arg2'], ['command2','arg1']];
var encoded = btoa(JSON.stringify(list1));
alert(encoded);
alert(atob(encoded));
jQuery.param() sounds good.

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