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Best way to check for “empty or null value”
...y string is not different from any other string consisting of only spaces. All of these are folded to n spaces in char(n) per definition of the type. It follows logically that the above expressions work for char(n) as well - just as much as these (which wouldn't work for other character types):
coal...
Get login username in java
...ecific. A JVM running on a single-user system might not have a username at all.
– Chinmay Kanchi
Feb 18 '10 at 16:58
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JavaScript equivalent of PHP’s die
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This will not totally stop execution AFAIK, but only roughly around the throw. Specifics are very blurry but I'm pretty sure the script can keep running somewhere else.
– Rolf
Jan 29 '16 at 10:36
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Easy way to concatenate two byte arrays
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Additionally this is far easier when working with more than just 2 byte arrays.
– gardarh
Apr 17 '13 at 10:16
3
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Convert MySQL to SQlite [closed]
...has a command line tool for dealing with databases, you must have ruby installed, then:
$ gem install sequel mysql2 sqlite3
$ sequel mysql2://user:password@host/database -C sqlite://db.sqlite
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Install a module using pip for specific python version
On Ubuntu 10.04 by default Python 2.6 is installed, then I have installed Python 2.7. How can I use pip install to install packages for Python 2.7.
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The imported project “C:\Microsoft.CSharp.targets” was not found
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If you are using Monodevelop installs the packages: "mono-msbuild" and "mono-msbuild-sdkresolver". NOTE: Tested on Linux Manjaro.
– Eduardo Lucio
Jun 8 at 21:36
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How do I split a string by a multi-character delimiter in C#?
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This actually returns: 'Th' ' ' ' a sentence' with the example given in the question. Perhaps this is what he actually wants, but it's not what he specified.
– IRBMe
Jul 14 '09 at 17:53
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Integer division: How do you produce a double?
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Widening primitive conversions do not
lose information about the overall
magnitude of a numeric value.
[...]
Conversion of an int or a long value
to float, or of a long value to
double, may result in loss of
precision-that is, the result may lose
some of the least significa...
Add a default value to a column through a migration
... What do you mean when you say "make sure you update the field manually on the migration"? How does one do that?
– David Argyle Thacker
Jan 8 '16 at 21:51
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