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What's the Best Way to Shuffle an NSMutableArray?
If you have an NSMutableArray , how do you shuffle the elements randomly?
12 Answers
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Uninstall old versions of Ruby gems
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Way to clean out any old versions of gems.
sudo gem cleanup
If you just want to see a list of what would be removed you can use:
sudo gem cleanup -d
You can also cleanup just a specific gem by specifying its name:
sudo gem cleanup gemname
for remove specific version like 1.1.9 o...
How to prompt for user input and read command-line arguments [closed]
...pt that a) can accept user input and how do I make it b) read in arguments if run from the command line?
12 Answers
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How does bash tab completion work?
... possible completions, and readline inserts as much characters as are identified unambiguously by the characters already typed in. (You can configure the readline library quite much, see the section Command line editing of the Bash manual for details.)
Bash itself has the built-in complete to define...
How can I SELECT rows with MAX(Column value), DISTINCT by another column in SQL?
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Test it for distinct, if two equal max datetime be in the same home (with different players)
– Maksym Gontar
Mar 4 '09 at 21:04
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Generate URL in HTML helper
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I think that it would be better if constructor also initialize RouteCollection new UrlHelper(htmlHelper.ViewContext.RequestContext, htmlHelper.RouteCollection)
– kpull1
Sep 23 '15 at 7:33
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Is there a naming convention for Django apps
... short, all-lowercase names. Underscores can be used
in the module name if it improves readability. Python packages should
also have short, all-lowercase names, although the use of underscores is
discouraged.
So, 1 and 3 are both valid, but 3 would be the recommended approach.
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How to get last inserted row ID from WordPress database?
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"This function returns false if the row could not be inserted. Otherwise, it returns the number of affected rows (which will always be 1)." From: codex.wordpress.org/Function_Reference/wpdb_Class#INSERT_rows
– unbreak
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When to choose checked and unchecked exceptions
..., you try reading a file but someone deletes it between the time you check if it exists and the time the read operation begins. By declaring a checked exception, you are telling the caller to anticipate this failure.
Reasonable to recover from: There is no point telling callers to anticipate excepti...
using awk with column value conditions
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If you're looking for a particular string, put quotes around it:
awk '$1 == "findtext" {print $3}'
Otherwise, awk will assume it's a variable name.
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