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Is the C# static constructor thread safe?
...ception, forgetting to call Release), next time this Singleton is accessed from a different thread it will deadlock in Singleton.Acquire().
– Milan Gardian
Jun 25 '09 at 13:16
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Android Closing Activity Programmatically
What is the equivalent operation within an activity to navigating away from the screen. Like when you press the back button, the activity goes out of view. How can this be called from inside an activity so that it closes itself.
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How do I clear/delete the current line in terminal?
...y
Ctrl+g Cancel the search and restore original line
Ctrl+n Next command from the History
Ctrl+p previous command from the History
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Is #pragma once a safe include guard?
...copy files around but uses symlinks instead, or include the same file only from one location in each translation unit. Sounds more like your infrastructure is a mess that has to be reorganized.
– Yakov Galka
May 11 '12 at 19:04
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how to get the last character of a string?
...thod.
Just by:
str.slice(-1);
A negative start index slices the string from length+index, to length, being index -1, the last character is extracted:
"abc".slice(-1); // "c";
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.NET HashTable Vs Dictionary - Can the Dictionary be as fast?
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@Howiecamp: This is not really much different from Hashtable. Hash tables store 3 pieces of information in an entry: key hash, key itself, and the value. For items with equal hash, it'll have to traverse the list to find the item with equal key and return its value. This...
jQuery .hasClass() vs .is()
... a preferred method of determining whether an element is assigned a class, from a performance standpoint?
4 Answers
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Difference between VARCHAR and TEXT in MySQL [duplicate]
...CHAR does not provide any noticeable performance improvement. (This comes from an old wives tale about MyISAM tables; even there it was of dubious validity.)
– Rick James
Jan 27 '19 at 23:39
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PHP, get file name without file extension
...eck out pathinfo(), it gives you all the components of your path.
Example from the manual:
$path_parts = pathinfo('/www/htdocs/index.html');
echo $path_parts['dirname'], "\n";
echo $path_parts['basename'], "\n";
echo $path_parts['extension'], "\n";
echo $path_parts['filename'], "\n"; // filename ...
How do I mock an open used in a with statement (using the Mock framework in Python)?
...thon/mock/magicmock.html
An example of mocking open as a context manager (from the examples page in the mock documentation):
>>> open_name = '%s.open' % __name__
>>> with patch(open_name, create=True) as mock_open:
... mock_open.return_value = MagicMock(spec=file)
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