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Function in JavaScript that can be called only once
...e a function which can be executed only once, in each time after the first it won't be executed. I know from C++ and Java about static variables that can do the work but I would like to know if there is a more elegant way to do this?
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Set NOW() as Default Value for datetime datatype?
I have two columns in table users namely registerDate and lastVisitDate which consist of datetime data type. I would like to do the following.
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CALayers didn't get resized on its UIView's bounds change. Why?
I have a UIView which has about 8 different CALayer sublayers added to its layer.
If I modify the view's bounds (animated), then the view itself shrinks (I checked it with a backgroundColor ), but the sublayers' size remains unchanged .
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How to detect Safari, Chrome, IE, Firefox and Opera browser?
...ts in checking the User agent string. This method is not reliable, because it's trivial to spoof this value.
I've written a method to detect browsers by duck-typing.
Only use the browser detection method if it's truly necessary, such as showing browser-specific instructions to install an extension. ...
Metadata file … could not be found error when building projects
...ta file ... could not be found. If I do a rebuild of the complete solution it works.
21 Answers
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How can I check if a string represents an int, without using try/except?
...esents an integer (e.g., '3' , '-17' but not '3.14' or 'asfasfas' ) Without using a try/except mechanism?
18 Answers
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How to change to an older version of Node.js
... Version Manager.
Use following command to get nvm
curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.34.0/install.sh | bash
You can find it at https://github.com/creationix/nvm
It allows you to easily install and manage multiple versions of node. Here's a snippet from the help:
Usa...
How does virtual inheritance solve the “diamond” (multiple inheritance) ambiguity?
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You want: (Achievable with virtual inheritance)
A
/ \
B C
\ /
D
And not: (What happens without virtual inheritance)
A A
| |
B C
\ /
D
Virtual inheritance means that there will be only 1 instance of the base A ...
Hidden Features of SQL Server
...'X' 10 times. This can save you from tedious copy/pasting when doing repetitive stuff.
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answered Sep 26 '08 at 18:13
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Find the version of an installed npm package
...alled packages.
You can find the version of a specific package by passing its name as an argument. For example, npm list grunt will result in:
projectName@projectVersion /path/to/project/folder
└── grunt@0.4.1
Alternatively, you can just run npm list without passing a package name as an ar...