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How Do I Choose Between a Hash Table and a Trie (Prefix Tree)?
...table or a prefix tree what are the discriminating factors that would lead me to choose one over the other. From my own naive point of view it seems as though using a trie has some extra overhead since it isn't stored as an array but that in terms of run time (assuming the longest key is the longest...
How to copy commits from one branch to another?
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You should really have a workflow that lets you do this all by merging:
- x - x - x (v2) - x - x - x (v2.1)
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x - x - x (wss)
So all you have to do is git checkout v2.1 and git merge wss. If for some reason you really can't do this, and you can't use git rebase ...
How to run multiple Python versions on Windows
...ifferent copy of Python is as easy as starting the correct executable. You mention that you've started a python instance, from the command line, by simply typing python.
What this does under Windows, is to trawl the %PATH% environment variable, checking for an executable, either batch file (.bat),...
How to properly assert that an exception gets raised in pytest?
...Apr 24 '15 at 18:52
Murilo GiacomettiMurilo Giacometti
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Recommended SQL database design for tags or tagging [closed]
I've heard of a few ways to implement tagging; using a mapping table between TagID and ItemID (makes sense to me, but does it scale?), adding a fixed number of possible TagID columns to ItemID (seems like a bad idea), Keeping tags in a text column that's comma separated (sounds crazy but could work)...
Java Replacing multiple different substring in a string at once (or in the most efficient way)
...en it could be worthwhile using a java.util.regex.Matcher (this requires time up-front to compile, so it won't be efficient if your input is very small or your search pattern changes frequently).
Below is a full example, based on a list of tokens taken from a map. (Uses StringUtils from Apache Comm...
HTML anchor link - href and onclick both?
I want to author an anchor tag that executes some JavaScript and then proceeds to go wherever the href was taking it. Invoking a function that executes my JavaScript and then sets window.location or top.location to the href location doesn't work for me.
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Flatten List in LINQ
I have a LINQ query which returns IEnumerable<List<int>> but i want to return only List<int> so i want to merge all my record in my IEnumerable<List<int>> to only one array.
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ActiveRecord, has_many :through, and Polymorphic Associations
...roblem, I think I agonized for about a day over how to do this the first time I encountered it. Didn't help that it was one of the first things I tried to do in Rails that didn't involve following a tutorial/book.
– EmFi
Nov 6 '09 at 17:28
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Batch file: Find if substring is in string (not in a file)
...starea> testprog bcd
It contains bcd
A couple of notes:
The if statement is the meat of this solution, everything else is support stuff.
The x before the two sides of the equality is to ensure that the string bcd works okay. It also protects against certain "improper" starting characters.
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