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Java String split removed empty values
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split(delimiter) by default removes trailing empty strings from result array. To turn this mechanism off we need to use overloaded version of split(delimiter, limit) with limit set to negative value like
String[] split = data.split("\\|", -1);
Little more details:
split(regex) inter...
What are the git concepts of HEAD, master, origin?
...sh to that branch, I type "git push origin featureA". I can pull the same from the remote as well by saying "git pull origin featureA", make changes. And head is only referring to local copy. @OK999 I believe HEAD is pointing to whichever branch you are checked out at the moment in the local. If...
Why is creating a Thread said to be expensive?
...urces as long as it is alive; e.g. the thread stack, any objects reachable from the stack, the JVM thread descriptors, the OS native thread descriptors.
The costs of all of these things are platform specific, but they are not cheap on any Java platform I've ever come across.
A Google search foun...
What kind of virtual machine is BEAM (the Erlang VM)?
From what I understand a virtual machine falls into two categories either "system virtual machine" or a "process virtual machine". It's kind of fuzzy to me where BEAM lies. Is there another kind of virtual machine I am not aware of?
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Intercept page exit event
...t in production. console.log is not crossbrowser; each postRequest suffers from the delay of the previous ones (which also means the page will hang there for the duration of your loop * scheduled requests); the requests aren't started in parallel; you aren't guaranteed to really send your requests. ...
Programmatically scroll a UIScrollView
...y: y), animated: true)
See the guide "Scrolling the Scroll View Content" from Apple as well.
To do slideshows with UIScrollView, you arrange all images in the scroll view, set up a repeated timer, then -setContentOffset:animated: when the timer fires.
But a more efficient approach is to use 2 im...
What is the difference between .*? and .* regular expressions?
... Can you explain or show an example of how the greedy ? differs from the non-greedy ?? ?
– AdrianHHH
Nov 25 '15 at 15:36
4
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Heroku “psql: FATAL: remaining connection slots are reserved for non-replication superuser connectio
...dically, I get this error message when trying to access the database, both from the CLI and from loading a page on the server:
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Inno Setup for Windows service?
...e switch --start to your c# application and start windows service directly from the program by using ServiceController class (msdn.microsoft.com/en-us/library/…).
– lubos hasko
Sep 20 '09 at 2:52
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Python creating a dictionary of lists
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You can use defaultdict:
>>> from collections import defaultdict
>>> d = defaultdict(list)
>>> a = ['1', '2']
>>> for i in a:
... for j in range(int(i), int(i) + 2):
... d[j].append(i)
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>>> d
defaultdict(<t...