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Does Foreign Key improve query performance?
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foreign keys do improve performance, at least in MySQL. Moreover, you're right, the creation of a FK does not create an index; the creation of a FK requires an index
– Félix Gagnon-Grenier
Aug 26 '14 at 17:31
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How to join components of a path when you are constructing a URL in Python
... begins with a slash which signifies that it already begins at the website root.
On Python 2, you have to do
from urlparse import urljoin
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How to reference the initial commit?
...tional problem with your question: there can exist more than one such TAIL root commit (parentless commit) in a repository (even if we discount disconnected branches, such as 'html', 'man' and 'todo' in git.git repository). This is usually result of joining separate projects in one, or using subtree...
Custom toast on Android: a simple example
...p://schemas.android.com/apk/res/android"
android:id="@+id/toast_layout_root"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="10dp"
android:background="#DAAA" >
<ImageView android:id="@+id/im...
Using .gitignore to ignore everything but specific directories
...pository. You just don't.
#
# Solution: stick this file up your repository root (which it assumes is
# also the WordPress root directory) and add exceptions for any plugins,
# themes, and other directories that should be under version control.
#
# See the comments below for more info on how to add e...
rsync error: failed to set times on “/foo/bar”: Operation not permitted
... an administrator account, try "sudo rsync -av " Alternately, enable the root account and sign in as root. That should allow you to completely hose your system and brute force your rsync! ;-) I'm not sure if the above mentioned --extended-attributes will help, but I threw it in too, just for go...
How to use OpenFileDialog to select a folder?
...ch is just the FolderBrowserDialog). It is completely unusable: a bunch of root dirs, a missing favorites panel, and the most horrible — you can't even paste a path there! And now as a programmer I see an advice to use it… Please, don't do it.
– Hi-Angel
Au...
Outputting data from unit test in python
...og.debug() next to each other, and explicitly turn on DEBUG logging at the root from the setUp() method, but only the print output shows up.
– haridsv
Nov 15 '11 at 2:04
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How to run a PowerShell script from a batch file
... answered Mar 29 '14 at 19:38
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Anatomy of a “Memory Leak”
...book.
Basically, in .NET a memory leak occurs when referenced objects are rooted and thus cannot be garbage collected. This occurs accidentally when you hold on to references beyond the intended scope.
You'll know that you have leaks when you start getting OutOfMemoryExceptions or your memory usag...