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What is a non-capturing group in regular expressions?
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Let me try to explain this with an example.
Consider the following text:
http://stackoverflow.com/
https://stackoverflow.com/questions/tagged/regex
Now, if I apply the regex below over it...
(https?|ftp)://([^/\r\n]+)(/[^\r\n]*)?
... I would get ...
How to list all the files in a commit?
I am looking for a simple git command that provides a nicely formatted list of all files that were part of the commit given by a hash (SHA1), with no extraneous information.
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error: passing xxx as 'this' argument of xxx discards qualifiers
...he std::set are stored as const StudentT. So when you try to call getId() with the const object the compiler detects a problem, mainly you're calling a non-const member function on const object which is not allowed because non-const member functions make NO PROMISE not to modify the object; so the ...
Sorting arrays in NumPy by column
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@steve's answer is actually the most elegant way of doing it.
For the "correct" way see the order keyword argument of numpy.ndarray.sort
However, you'll need to view your array as an array with fields (a structured array).
The "correct" way is quite ugly if you didn't initially ...
Line-breaking widget layout for Android
I'm trying to create an activity that presents some data to the user. The data is such that it can be divided into 'words', each being a widget, and sequence of 'words' would form the data ('sentence'?), the ViewGroup widget containing the words. As space required for all 'words' in a 'sentence' wou...
How to squash all git commits into one?
How do you squash your entire repository down to the first commit?
17 Answers
17
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Merge development branch with master
I have two branches namely master and development in a GitHub Repository. I am doing all my development in development branch as shown.
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Check whether variable is number or string in JavaScript
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If you're dealing with literal notation, and not constructors, you can use typeof:.
typeof "Hello World"; // string
typeof 123; // number
If you're creating numbers and strings via a constructor, such as var foo = new String("foo")...
How to get cumulative sum
... 3 | 3 | 25 |
| 4 | 15 | 40 |
| 5 | 23 | 63 |
Edit: this is a generalized solution that will work across most db platforms. When there is a better solution available for your specific platform (e.g., gareth's), use it!
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How do I POST urlencoded form data with $http without jQuery?
...form the outgoing request by
serializing the data as JSON and then posting it with the content-
type, "application/json". When we want to post the value as a FORM
post, we need to change the serialization algorithm and post the data
with the content-type, "application/x-www-form-urlencoded".
Exampl...