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How do I force Postgres to use a particular index?
... a particular query plan for all time.
As a very blunt hammer, useful for testing, you can use the enable_seqscan and enable_indexscan parameters. See:
Examining index usage
enable_ parameters
These are not suitable for ongoing production use. If you have issues with query plan choice, you shou...
Relative imports in Python 2.7
...as packages, that contain interdependent files, where I want to be able to test parts of them piecemeal. Let's call this lib.foo and say that it needs access to lib.fileA for functions f1 and f2, and lib.fileB for class Class3.
I have included a few print calls to help illustrate how this works. I...
How to create a WPF UserControl with NAMED content
... xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:test="clr-namespace:user_Control_Name"
xmlns:helper="clr-namespace:UI.Helpers" x:Name="mainWindow"
Title="MainWindow" Height="350" Width="525">
<Grid>
<test:TestUserCont...
Coding Practices which enable the compiler/optimizer to make a faster program
...ithout branching:
bool status = true;
status = status && /* first test */;
status = status && /* second test */;
The short circuiting of the Logical AND operator (&&) prevents execution of the tests if the status is false.
Example:
struct Reader_Interface
{
virtual boo...
Can I install the “app store” in an IOS simulator?
...tor in my computer doesn't have app store. I want to use the app store to test a program I wrote on my simulator.
3 Answ...
Is APC compatible with PHP 5.4 or PHP 5.5?
...would personally advise those who depend on APC for it's opcode caching to test their code with the upcoming built-in opcode cache, and feed back any issues encountered to ensure a stable final release.
I do not know what this means for the future of APC.
APC FOR PHP 5.4+ IS STILL FLAGGED AS BETA
Th...
How to deal with page breaks when printing a large HTML table
...p-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Test</title>
<style type="text/css">
table { page-break-inside:auto }
tr { page-break-inside:avoid; page-break-after:auto }
thead { display:table-header-group }
tfoot { display:table-footer-grou...
Android EditText delete(backspace) key event
... from XML remember to use the full package name as the tag:
<cc.buttfu.test.ZanyEditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/somefield"
></cc.buttfu.test.ZanyEditText>
...
How can I detect if a selector returns null?
...answer, but it would be helpful if you explain what happens if NONE of the tested elements exists. Short answer: TypeError: firstExistingElement.doSomething is not a function. You can wrap the entire variable assignment/test in an if() and only do something if an element is found....
...
How to check a string for specific characters?
...nformation on strings, including about using the in operator for substring tests.
Update: This does the same job as my above suggestion with less repetition:
# When looking for single characters, this checks for any of the characters...
# ...since strings are collections of characters
any(i in '&l...