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Counting occurrences in Vim without marking the buffer changed
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To avoid the substitution, leave the second pattern empty, and add the “n” flag:
:%s/pattern-here//gn
This is described as an official tip.
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How to access the ith column of a NumPy multidimensional array?
... reference is reflected in the original array.
– harmands
Oct 18 '16 at 14:21
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Delete rows from a pandas DataFrame based on a conditional expression involving len(string) giving K
I have a pandas DataFrame and I want to delete rows from it where the length of the string in a particular column is greater than 2.
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jQuery map vs. each
In jQuery, the map and each functions seem to do the same thing. Are there any practical differences between the two? When would you choose to use one instead of the other?
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Using Excel OleDb to get sheet names IN SHEET ORDER
... That's code I'd like to see! How can you query for 'the Nth sheet' and the number of sheets?
– Steve Cooper
Jul 23 '09 at 8:27
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What is the best way to count “find” results?
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find <expr> -type f -printf '.' | wc -c
It will be more reliable and faster than counting the lines.
Note that I use the find's printf, not an external command.
Let's bench a bit :
$ ls -1
a
e
l
ll.sh
r
t
y
z
My snippet benchmark :
$ time find -type f -printf '.' | wc -c
8
real ...
Angular HttpPromise: difference between `success`/`error` methods and `then`'s arguments
...mment below, success() does return the original promise. I'll not change; and leave it to OP to edit.
The major difference between the 2 is that .then() call returns a promise (resolved with a value returned from a callback) while .success() is more traditional way of registering callbacks and d...
How to find an available port?
...nt to start a server which listen to a port. I can specify port explicitly and it works. But I would like to find a port in an automatic way. In this respect I have two questions.
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How do I use regex in a SQLite query?
...he regexp() user function. No regexp() user function is defined by default and so use of the REGEXP operator will normally result in an error message. If a application-defined SQL function named "regexp" is added at run-time, that function will be called in order to implement the REGEXP operator. (s...
iOS start Background Thread
... is responsible for setting up the new thread's autorelease pool, run loop and other configuration details – see "Using NSObject to Spawn a Thread" in Apple's Threading Programming Guide.
You'd probably be better off using Grand Central Dispatch, though:
dispatch_async(dispatch_get_global_queue(...