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How to quietly remove a directory with content in PowerShell
...o remove everything within that folder: Remove-Item './folder/*'. If you really want to clear out only files of all folders you can list all leafs and pipe it to the Remove-Item cmdlet Get-ChildItem -Recurse -File | Remove-Item
– Michael Kargl
Jun 1 '19 at 11:3...
Replacing column values in a pandas DataFrame
...strings containing numbers. You can convert them to "1" and "0", if you really want, but I'm not sure why you'd want that.)
The reason your code doesn't work is because using ['female'] on a column (the second 'female' in your w['female']['female']) doesn't mean "select rows where the value is 'fe...
NSOperation vs Grand Central Dispatch
...ed first, but as of 10.5 and iOS 2, NSOperationQueue and friends are internally implemented using GCD.
In general, you should use the highest level of abstraction that suits your needs. This means that you should usually use NSOperationQueue instead of GCD, unless you need to do something that NSOp...
Compare two objects' properties to find differences?
...opriately. An alternative would be to use ReflectiveEquals recursively for all but some known types, but that gets tricky.
public bool ReflectiveEquals(object first, object second)
{
if (first == null && second == null)
{
return true;
}
if (first == null || second ==...
Rounded table corners CSS only
... only, you get 2px thick borders, which is ugly. Rather have no borders at all.
– Vishal Shah
Feb 8 '11 at 11:27
...
Learning Regular Expressions [closed]
I don't really understand regular expressions. Can you explain them to me in an easy-to-follow manner? If there are any online tools or books, could you also link to them?
...
XPath: How to select nodes which have no attributes?
...
//node[not(@*)]
That's the XPath to select all nodes named "node" in the document without any attributes.
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How to shrink the .git folder
...
you should not delete all changes older than 30 days (i think it's somehow possible exploiting git, but really not recommended).
you can call git gc --aggressive --prune, which will perform garbage collection in your repository and prune old obje...
What's the fastest way to convert String to Number in JavaScript?
...);
parseInt(x, 10);
parseFloat(x);
+x;
By this quick test I made, it actually depends on browsers.
http://jsperf.com/best-of-string-to-number-conversion/2
Implicit marked the fastest on 3 browsers, but it makes the code hard to read… So choose whatever you feel like it!
...
Dependency Injection vs Factory Pattern
...
When using a factory your code is still actually responsible for creating objects. By DI you outsource that responsibility to another class or a framework, which is separate from your code.
sha...