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What's the common practice for enums in Python? [duplicate]
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@Joan You could do _unused, Shaded, Shiny, Transparent, Matte = range(5)
– zekel
Dec 9 '10 at 2:12
81
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Why does HTML5 form-validation allow emails without a dot?
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I wonder when the last time someone actually sent an email to localhost!
– Matthew Lock
May 19 '17 at 3:14
2
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How to quickly check if folder is empty (.NET)?
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There is a new feature in Directory and DirectoryInfo in .NET 4 that allows them to return an IEnumerable instead of an array, and start returning results before reading all the directory contents.
What's New in the BCL in .NET 4 Beta 1
Directory.EnumerateFileSystemEntries method overloads
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Fast way to get image dimensions (not filesize)
...r if it reads the whole data for that though. See the manpage of exiv2 for all supported image formats.
head -n1 will give you the dimensions for PPM, PGM formats.
For formats popular on the web, both exiv2 and identify will do the job.
Depending on the use-case you may need to write your own scri...
Why does JQuery have dollar signs everywhere?
...ring your using noConflict (more below)
var divs = $("div"); // Find all divs
var divs = jQuery("div"); // Also find all divs, because
console.log($ === jQuery); // "true"
If you don't want to use the alias, you don't have to. And if you want $ to not be an alias for jQuery, you can use noC...
Create numpy matrix filled with NaNs
...r operations in numpy.
You can create an uninitialized array and assign to all entries at once:
>>> a = numpy.empty((3,3,))
>>> a[:] = numpy.nan
>>> a
array([[ NaN, NaN, NaN],
[ NaN, NaN, NaN],
[ NaN, NaN, NaN]])
I have timed the alternatives a[:] ...
How to select a node using XPath if sibling node has a specific value?
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Seems I actually didn't read the title. :) Answer stays valid anyway.
– Jens Erat
Jun 11 '13 at 13:34
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NoClassDefFoundError: android.support.v7.internal.view.menu.MenuBuilder
....v7.** { *; }
-keep interface android.support.v7.** { *; }
with this:
# Allow obfuscation of android.support.v7.internal.view.menu.**
# to avoid problem on Samsung 4.2.2 devices with appcompat v21
# see https://code.google.com/p/android/issues/detail?id=78377
-keep class !android.support.v7.inter...
libunwind链接时报错：undefined reference to `_Ux86_64_init_local\' - ...
libunwind链接时报错：undefined reference to `_Ux86_64_init_local'编译安装libunwind后，代码编译链接时报错：undefined reference to `_Ux86_64_init_local& 39;，链接选项加了 -lunwind，仍然报错。原因：编译出来的libunwind拆分成了很多个 编译安装libunwi...
Measuring text height to be drawn on Canvas ( Android )
... approximate height. I've also been messing around with FontMetrics , but all these seem like approximate methods that suck.
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