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How can I alter a primary key constraint using SQL syntax?
...rimary key constraint name, use query found here to look it up (or look up and drop all at once). http://stackoverflow.com/a/13948609/945875
– Justin
Dec 19 '13 at 20:06
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Check if value already exists within list of dictionaries?
...sing the above code can give you a KeyError. You can fix this by using get and providing a default value. If you don't provide a default value, None is returned.
if not any(d.get('main_color', default_value) == 'red' for d in a):
# does not exist
...
Android: how to hide ActionBar on certain activities
I've developed a simple demo application with a splash screen a map and some regular screens.
16 Answers
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Convert object to JSON in Android
Is there a simple method to convert any object to JSON in Android?
6 Answers
6
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How should I copy Strings in Java?
...e safe. The latter, however, is less efficient (it creates an extra object and in some cases copies the character data).
With this in mind, the first version should be preferred.
share
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improve th...
CSS disable text selection
...
Don't apply these properties to the whole body. Move them to a class and apply that class to the elements you want to disable select:
.disable-select {
-webkit-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
}
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Extracting numbers from vectors of strings
...
How about
# pattern is by finding a set of numbers in the start and capturing them
as.numeric(gsub("([0-9]+).*$", "\\1", years))
or
# pattern is to just remove _years_old
as.numeric(gsub(" years old", "", years))
or
# split by space, get the element in first index
as.numeric(sapply(...
npm: disable postinstall script for package
...ch options? This is not described in 'npm help install', 'npm help config' and 'npm help scripts'.
– farwayer
May 6 '14 at 23:55
3
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Django's SuspiciousOperation Invalid HTTP_HOST header
... It is just connecting using the IP address not the domain name and the IP address is not in the ALLOWED_HOSTS - or at least that is what was happening with me - I could repro it by point my browser to the IP address.
– markmnl
May 17 '14 at 2:38
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Creating folders inside a GitHub repository without using Git
...reated GitHub repository without installing the Git setup for (Mac, Linux, and Windows). Is it possible to do so?
4 Answers...