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How to use XPath in Python?
...thFreeContext(). This is not very Pythonic.
If you are doing simple path selection, stick with ElementTree ( which is included in Python 2.5 ). If you need full spec compliance or raw speed and can cope with the distribution of native code, go with libxml2.
Sample of libxml2 XPath Use
import l...
machine learning libraries in C# [closed]
...iningSet trainingSet)
{
var attributes = trainingSet._attributes.Select(x => new Attribute(x)).ToArray();
var featureVector = new FastVector(trainingSet.AttributesCount);
foreach (var attribute in attributes)
{
featureVector.addElement(attribute);
}
...
Cannot download Docker images behind a proxy
...for Mac (or Docker for Windows), just right-click the Docker tray icon and select Preferences (Windows: Settings), then go to Advanced, and under Proxies specify your proxy settings there. Click Apply and Restart and wait until Docker restarts.
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Recursively add files by pattern
...king your files and have made changes to them and now you want to add them selectively based on a pattern, you can use the --modified flag
git ls-files --modified | grep '<pattern>' | xargs git add
For example, if you only want to add the CSS changes to this commit, you can do
git ls-files...
Trying to SSH into an Amazon Ec2 instance - permission error
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Management console > EC2 > Instances and select your instance.
– renick
Mar 13 '14 at 7:12
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How to make an empty div take space
...t means the user won't accidentally copy-paste it, pseudo-elements being unselectable by default.
– Domino
Mar 26 '19 at 18:26
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How to empty a Heroku database
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If you already have multiple gems installed, you may be presented with:
Select gem to uninstall:
1. heroku-2.25.0
2. heroku-2.26.2
3. All versions
Just uninstall #2 and rerun the command. Joy!
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Undo git update-index --skip-worktree
...-v will print all files with their status
grep -i ^S will filter files and select only skip worktree (S) or skip worktree and assume unchanged (s), -i means ignore case sensitive
cut -c 3- will remove status and leave only paths, cutting from the 3-rd character to the end
tr '\012' '\000' will repla...
Undefined symbols for architecture i386: _OBJC_CLASS_$_SKPSMTPMessage", referenced from: error
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Its worth noting that you can select the .m file and tick the box next to your target in right panel "Target Membership" section. When you add a file to your project, you are asked if you want to "Add to targets:", you may have said no, but you can add it...
How to display a dynamically allocated array in the Visual Studio debugger?
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For beginners: If you select "a" variable, right click and add to watch list (inspect), if you open de debugger view in the list of watched values (I can't find the name of the window right now), you can double click "a" and rename it "a,X" where ...