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List comprehension vs. lambda + filter
...on as you use a Python function (whether created by def or lambda) it is likely that filter will be slower than the list comprehension. It almost certainly is not enough to matter, and you shouldn't think much about performance until you've timed your code and found it to be a bottleneck, but the di...
LINQ where vs takewhile
I want to get a difference between TakeWhile & Where LINQ methods .I got the following data from MSDN .But It didn't make sense to me
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MySQL Removing Some Foreign keys
I have a table whose primary key is used in several other tables and has several foreign keys to other tables.
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Test if a command outputs an empty string
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Previously, the question asked how to check whether there are files in a directory. The following code achieves that, but see rsp's answer for a better solution.
Empty output
Commands don’t return values – they output them. You can capture thi...
How does C compute sin() and other math functions?
...fsin assembly instruction. Source code: sysdeps/ieee754/dbl-64/s_sin.c, look for __sin (double x).
This code is very complex. No one software algorithm is as fast as possible and also accurate over the whole range of x values, so the library implements several different algorithms, and its first jo...
How to change font size in Eclipse for Java text editors?
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If you are changing the font size, but it is only working for the currently open file, then I suspect that you are changing the wrong preferences.
On the Eclipse toolbar, select Window → Preferences
Set the font size, General → Appearance → Colors and Fonts → Java → ...
How do I reset a sequence in Oracle?
In PostgreSQL , I can do something like this:
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Batch renaming files with Bash
How can Bash rename a series of packages to remove their version numbers? I've been toying around with both expr and %% , to no avail.
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CUDA incompatible with my gcc version
I have troubles compiling some of the examples shipped with CUDA SDK.
I have installed the developers driver (version 270.41.19) and the CUDA toolkit,
then finally the SDK (both the 4.0.17 version).
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How to select records from last 24 hours using SQL?
I am looking for a where clause that can be used to retrieve records for the last 24 hours?
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