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When to use “ON UPDATE CASCADE”
...CADE.
However, let's say that your primary key is a 10 digit UPC bar code and because of expansion, you need to change it to a 13-digit UPC bar code. In that case, ON UPDATE CASCADE would allow you to change the primary key value and any tables that have foreign key references to the value will be...
What is a “slug” in Django?
...ite sure what this is, but I do know it has something to do with URLs. How and when is this slug-thing supposed to be used?
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Safely remove migration In Laravel
In Laravel, there appears to be a command for creating a migration, but not removing.
9 Answers
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My images are blurry! Why isn't WPF's SnapsToDevicePixels working?
...utRounding should be set by default. Images show up just like the original and even text in some places (like ContextMenus, for me at least) shows up crisper than before. Thanks, Domokun!
– grant
Apr 4 '11 at 2:46
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Check if a temporary table exists and delete if it exists before creating a temporary table
I am using the following code to check if the temporary table exists and drop the table if it exists before creating again. It works fine as long as I don't change the columns. If I add a column later, it will give an error saying "invalid column". Please let me know what I am doing wrong.
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Why does Eclipse automatically add appcompat v7 library support whenever I create a new project?
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As stated in Android's Support Library Overview, it is considered good practice to include the support library by default because of the large diversity of devices and the fragmentation that exists between the different versions of Androi...
LINQ: Not Any vs All Don't
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Implementation of All according to ILSpy (as in I actually went and looked, rather than the "well, that method works a bit like ..." I might do if we were discussing the theory rather than the impact).
public static bool All<TSource>(this IEnumerable<TSource> source, Func<...
Executing multi-line statements in the one-line command-line?
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this style can be used in makefiles too (and in fact it is used quite often).
python - <<EOF
import sys
for r in range(3): print 'rob'
EOF
or
python - <<-EOF
import sys
for r in range(3): print 'rob'
EOF
in latter case leading tab character...
C/C++ with GCC: Statically add resource files to executable/library
...stream to make an iostream. std::stringstream is not great for this though and you can of course just use a pointer anywhere you can use an iterator.
If you're using this with automake don't forget to set BUILT_SOURCES appropriately.
The nice thing about doing it this way is:
You get text out, ...
Are lists thread-safe?
...t is often suggested to use queues with multiple threads, instead of lists and .pop() . Is this because lists are not thread-safe, or for some other reason?
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