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GCC -g vs -g3 GDB Flag: What is the Difference?
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format if neither of those are supported), including GDB extensions if
at all possible.
-gvmslevel
Request debugging information and also use level to specify how much information. The default level is 2. Level 0 produces no
debug information at all. Thus, -g0 negates -g.
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Level 3 includes e...
MySQL LIKE IN()?
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I like this answer - quick, simple, got all of the "options" in one line like I wanted (easy to edit). On the small result set I am targeting, no decrease in performance at all.
– Michael Wales
Jul 14 '09 at 19:04
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How to use the “required” attribute with a “radio” input field
...tribute for at least one input of the radio group.
Setting required for all inputs is more clear, but not necessary (unless dynamically generating radio-buttons).
To group radio buttons they must all have the same name value. This allows only one to be selected at a time and applies required to ...
Why covariance and contravariance do not support value type
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Basically, variance applies when the CLR can ensure that it doesn't need to make any representational change to the values. References all look the same - so you can use an IEnumerable<string> as an IEnumerable<object>...
How do I purge a linux mail box with huge number of emails? [closed]
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You can simply delete the /var/mail/username file to delete all emails for a specific user. Also, emails that are outgoing but have not yet been sent will be stored in /var/spool/mqueue.
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Meaning of “[: too many arguments” error from if [] (square brackets)
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# if [ hello world == 0 ]
fi
The same will be true for any function call that puts down a string containing spaces or other special characters.
Easy fix
Wrap the variable output in double quotes, forcing it to stay as one string (therefore one argument). For example,
VARIABLE=$(/some/comm...
How to change the href for a hyperlink using jQuery
...g
$("a").attr("href", "http://www.google.com/")
will modify the href of all hyperlinks to point to Google. You probably want a somewhat more refined selector though. For instance, if you have a mix of link source (hyperlink) and link target (a.k.a. "anchor") anchor tags:
<a name="MyLinks">...
How to generate a range of numbers between two numbers?
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This is a fantastically elegant solution
– Aaron Hudon
Dec 22 '16 at 19:13
9
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Coloring white space in git-diff's output
...ght=new,old highlights whitespace errors on both deleted and added lines. all can be used as a short-hand for
old,new,context.
git diff --ws-error-highlight=new,old <file>
or
git diff --ws-error-highlight=all <file>
I don't know of a way to permanently turn this on and store this...
How to configure MongoDB Java driver MongoOptions for production use?
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Updated to 2.9 :
autoConnectRetry simply means the driver will automatically attempt to reconnect to the server(s) after unexpected disconnects. In production environments you usually want this set to true.
connectionsPerHost are the amount of physical connections a single Mongo instance (it's si...