How to Get a String Between Two Characters

Get Substring between two characters using javascript

You can try this

var mySubString = str.substring(
    str.indexOf(":") + 1, 
    str.lastIndexOf(";")
);

regex to get string between two % characters

Your pattern is fine but your code didn't compile. Try this instead:

Swift 4

let query = "Hello %test% how do you do %test1%"
let regex = try! NSRegularExpression(pattern:"%(.*?)%", options: [])
var results = [String]()

regex.enumerateMatches(in: query, options: [], range: NSMakeRange(0, query.utf16.count)) { result, flags, stop in
    if let r = result?.range(at: 1), let range = Range(r, in: query) {
        results.append(String(query[range]))
    }
}

print(results) // ["test", "test1"]

NSString uses UTF-16 encoding so NSMakeRange is called with the number of UTF-16 code units.

Swift 2

let query = "Hello %test% how do you do %test1%"
let regex = try! NSRegularExpression(pattern:"%(.*?)%", options: [])
let tmp = query as NSString
var results = [String]()

regex.enumerateMatchesInString(query, options: [], range: NSMakeRange(0, tmp.length)) { result, flags, stop in
    if let range = result?.rangeAtIndex(1) {
        results.append(tmp.substringWithRange(range))
    }
}

print(results) // ["test", "test1"]

Getting a substring out of Swift's native String type is somewhat of a hassle. That's why I casted query into an NSString

Extracting a string between other two strings in R

You may use str_match with STR1 (.*?) STR2 (note the spaces are "meaningful", if you want to just match anything in between STR1 and STR2 use STR1(.*?)STR2, or use STR1\\s*(.*?)\\s*STR2 to trim the value you need). If you have multiple occurrences, use str_match_all.

Also, if you need to match strings that span across line breaks/newlines add (?s) at the start of the pattern: (?s)STR1(.*?)STR2 / (?s)STR1\\s*(.*?)\\s*STR2.

library(stringr)
a <- " anything goes here, STR1 GET_ME STR2, anything goes here"
res <- str_match(a, "STR1\\s*(.*?)\\s*STR2")
res[,2]
[1] "GET_ME"

Another way using base R regexec (to get the first match):

test <- " anything goes here, STR1 GET_ME STR2, anything goes here STR1 GET_ME2 STR2"
pattern <- "STR1\\s*(.*?)\\s*STR2"
result <- regmatches(test, regexec(pattern, test))
result[[1]][2]
[1] "GET_ME"

How to get the substring between two markers in Python multiple times?

you can use regex

import re
s = '''alt="Thunder Force"/>ehkjehkljhiflealt="Godzilla vs. Kong"/>'''
x = re.findall(r'alt="(.*?)"/>', s)
print(x)

output

['Thunder Force', 'Godzilla vs. Kong']

Find string between two substrings

import re

s = 'asdf=5;iwantthis123jasd'
result = re.search('asdf=5;(.*)123jasd', s)
print(result.group(1))

How to get a substring between two strings in PHP?

If the strings are different (ie: [foo] & [/foo]), take a look at this post from Justin Cook.
I copy his code below:

function get_string_between($string, $start, $end){
    $string = ' ' . $string;
    $ini = strpos($string, $start);
    if ($ini == 0) return '';
    $ini += strlen($start);
    $len = strpos($string, $end, $ini) - $ini;
    return substr($string, $ini, $len);
}

$fullstring = 'this is my [tag]dog[/tag]';
$parsed = get_string_between($fullstring, '[tag]', '[/tag]');

echo $parsed; // (result = dog)

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