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Escape regex special characters in a Python string
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203
Use re.escape
>>> import re
>>> re.escape(r'\ a.*$')
'\\\\\\ a\\.\\*\\$'
>...
What are the differences between git remote prune, git prune, git fetch --prune, etc
...g. So, in short, git remote prune and git fetch --prune operate on number 2 above. For example, if you deleted a branch using the git web GUI and don't want it to show up in your local branch list anymore (git branch -r), then this is the command you should use.
To remove a local branch, you shoul...
Get time difference between two dates in seconds
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291
The Code
var startDate = new Date();
// Do your operations
var endDate = new Date();
var sec...
Difference between reduce and foldLeft/fold in functional programming (particularly Scala and Scala
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261
reduce vs foldLeft
A big big difference, not mentioned in any other stackoverflow answer rela...
List View Filter Android
... @Override
public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {
// When user changed the Text
MainActivity.this.adapter.getFilter().filter(cs);
}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) { }
@...
Post an empty body to REST API via HttpClient
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123
Use StringContent or ObjectContent which derive from HttpContent or you can use null as HttpCon...
Select last N rows from MySQL
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238
You can do it with a sub-query:
SELECT * FROM (
SELECT * FROM table ORDER BY id DESC LIMI...
Object reference not set to an instance of an object.Why doesn't .NET show which object is `null`?
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(For information about the new exception helper in Visual Studio 2017 see the end of this answer)
Consider this code:
String s = null;
Console.WriteLine(s.Length);
This will throw a NullReferenceException in the second line and you want to know why .NET doesn't tell you that it was s...
What are the differences between a UIView and a CALayer?
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224
On iOS, every UIView is backed by a Core Animation CALayer, so you are dealing with CALayers w...
Configure nginx with multiple locations with different root folders on subdomain
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247
You need to use the alias directive for location /static:
server {
index index.html;
ser...