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Extract elements of list at odd positions
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Solution
Yes, you can:
l = L[1::2]
And this is all. The result will contain the elements placed on the following positions (0-based, so first element is at position 0, second at 1 etc.):
1, 3, 5
so the result (actual numbers) will be:
2, 4, 6
Explanation
The [1::2]...
Does Python have a ternary conditional operator?
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You can index into a tuple:
(falseValue, trueValue)[test]
test needs to return True or False.
It might be safer to always implement it as:
(falseValue, trueValue)[test == True]
or you can use the built-in bool() to assure a Boolean value:
(falseValue, trueValue)[bool(<...
Convert NSNumber to int in Objective-C
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A tested one-liner:
int number = ((NSNumber*)[dict objectForKey:@"integer"]).intValue;
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Receiving “fatal: Not a git repository” when attempting to remote add a Git repo
...s step, but had to do it again after setting up my engine yard account installing engine yard.
– AVProgrammer
Feb 6 '12 at 1:04
3
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How does the Java 'for each' loop work?
...terators when accessing int or Integer arrays. Here is the output from the testing class at the bottom of this post, which sums the numbers in a 100-element primitive-int array (A is iterator, B is index):
[C:\java_code\]java TimeIteratorVsIndexIntArray 1000000
Test A: 358,597,622 nanoseconds
Test ...
iPhone 5 CSS media query
...ebkit-min-device-pixel-ratio: 2) {
/* iPhone only */
}
NB: I haven't tested the above code, but I've tested comma-delimited @media queries before, and they work just fine.
Note that the above may hit some other devices which share similar ratios, such as the Galaxy Nexus. Here is an additiona...
How to handle click event in Button Column in Datagridview?
... a single button per grid, you can jump right off to the races.
Putting it all together:
C#:
private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
var senderGrid = (DataGridView)sender;
if (senderGrid.Columns[e.ColumnIndex] is DataGridViewButtonColumn &am...
Select elements by attribute
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Note that if you're testing for existence (presumably in an if statement, for example) it's probably more correct/reliable to do: if($(":checkbox[myattr]").length()>0)...
– rinogo
Aug 15 '11 at 21:18
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What guidelines for HTML email design are there? [closed]
...'t even think about flash, Javascript, SVG, canvas, or anything like that.
Test, a lot. Make sure you test in a recent Outlook (things have changed a lot! It now uses Word as its HTML rendering engine, and it's crippled: Word 2007 HTML/CSS support). Gmail is pretty finicky also. Surprisingly Yahoo's...
Fastest Way of Inserting in Entity Framework
I'm looking for the fastest way of inserting into Entity Framework.
30 Answers
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