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How to use if - else structure in a batch file?
...but of course that only works in this example, it isn't a general solution for doing if-else.
There are lots of ways around this. Here is a few ideas, all are quite ugly but hey, this is (or at least was) DOS!
@echo off
set one=1
set two=2
REM Example 1
IF %one%_%two%==1_1 (
echo Example 1 f...
Saving a Numpy array as an image
... type of a Numpy array. How would I write it to disk it as an image? Any format works (png, jpeg, bmp...). One important constraint is that PIL is not present.
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What is a singleton in C#?
...ing .NET 4's Lazy<T> type," as well as the link to the Microsoft Doc for the Lazy<T> Class.
– Chiramisu
Feb 20 at 21:55
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Can I have onScrollListener for a ScrollView?
...) to it using the method addOnScrollChangedListener().
You can see more information about this class here.
It lets you be aware of every scrolling event - but without the coordinates. You can get them by using getScrollY() or getScrollX() from within the listener though.
scrollView.getViewTreeObs...
Cleaner way to update nested structures
...sal and 'mutation' of an immutable data structure. Scalaz provides Zippers for Stream (scalaz.Zipper), and Tree (scalaz.TreeLoc). It turns out that the structure of the zipper is automatically derivable from the original data structure, in a manner that resembles symbolic differentiation of an algeb...
Escaping regex string
I want to use input from a user as a regex pattern for a search over some text. It works, but how I can handle cases where user puts characters that have meaning in regex?
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What is the difference between char s[] and char *s?
...doesn't have to be in read-only memory (some implementations have no MMUs, for example). The n1362 c1x draft simply states that modifying such an array causes undefined behavior. But +1 anyway, since relying on that behavior is a silly thing to do.
– paxdiablo
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How do I execute inserts and updates in an Alembic upgrade script?
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What you are asking for is a data migration, as opposed to the schema migration that is most prevalent in the Alembic docs.
This answer assumes you are using declarative (as opposed to class-Mapper-Table or core) to define your models. It shoul...
Getting distance between two points based on latitude/longitude
I tried implementing this formula: http://andrew.hedges.name/experiments/haversine/
The aplet does good for the two points I am testing:
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Linux command or script counting duplicated lines in a text file?
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Thumbs up for the little -d note.
– sepehr
Feb 10 '15 at 13:04
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