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How can I create an error 404 in PHP?
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157
The up-to-date answer (as of PHP 5.4 or newer) for generating 404 pages is to use http_respons...
Regular expression to stop at first match
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1148
You need to make your regular expression non-greedy, because by default, "(.*)" will match al...
What is the right way to check for a null string in Objective-C?
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edited Nov 5 '14 at 3:14
answered Jun 10 '09 at 7:45
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IntelliJ Split Window Navigation
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102
Ctrl+Tab and Ctrl+Shift+Tab for Window | Goto Next Splitter and Goto Previous Splitter. Howeve...
Is arr.__len__() the preferred way to get the length of an array in Python?
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1233
my_list = [1,2,3,4,5]
len(my_list)
# 5
The same works for tuples:
my_tuple = (1,2,3,4,5)
l...
What is better: @SuppressLint or @TargetApi?
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1 Answer
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Active
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Inline code in org-mode
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121
You can enclose the text within = or ~ signs to have it typeset in monospaced font and export ...
What are the obj and bin folders (created by Visual Studio) used for?
I created a new project in Visual Studio 2010 and noticed that there are now two new folders named obj and bin in my project directory.
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Does name length impact performance in Redis?
... long.
The example key you give is for a set, set lookup methods are O(1). The more complex operations on a set (SDIFF, SUNION, SINTER) are O(N). Chances are that populating $userId was a more expensive operation than using a longer key.
Redis comes with a benchmark utility called redis-benc...
SQL UPDATE all values in a field with appended string CONCAT not working
...; select * from t;
+------+-------+
| id | data |
+------+-------+
| 1 | max |
| 2 | linda |
| 3 | sam |
| 4 | henry |
+------+-------+
4 rows in set (0.02 sec)
mysql> update t set data=concat(data, 'a');
Query OK, 4 rows affected (0.01 sec)
Rows matched: 4 Changed: 4 Warnin...