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String slugification in Python
...rtEquals(r, "jaja-lol-mememeoo-a")
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This package does a bit more than what you posted (take a look at the source, it's just one file). The project is still active (got updated 2 days before I originally answered, over seven years later (last checked 2020-06-30), it still gets updat...
Why use a READ UNCOMMITTED isolation level?
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This isolation level allows dirty reads. One transaction may see uncommitted changes made by some other transaction.
To maintain the highest level of isolation, a DBMS usually acquires locks on data, which may result in a loss of concurrency and a high locking overhead. This isolation level rel...
Pros and Cons of Interface constants [closed]
PHP interfaces allow the definition of constants in an interface, e.g.
2 Answers
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decompiling DEX into Java sourcecode
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It's easy
Get these tools:
dex2jar to translate dex files to jar files
jd-gui to view the java files in the jar
The source code is quite readable as dex2jar makes some optimizations.
Procedure:
And here's the procedure on...
Can regular expressions be used to match nested patterns? [duplicate]
Is it possible to write a regular expression that matches a nested pattern that occurs an unknown number of times? For example, can a regular expression match an opening and closing brace when there are an unknown number of open/close braces nested within the outer braces?
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map vs. hash_map in C++
I have a question with hash_map and map in C++. I understand that map is in STL, but hash_map is not a standard. What's the difference between the two?
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How do you share code between projects/solutions in Visual Studio?
I have two solutions which have some common code, so I'd like to extract it out and share it between them. Furthermore, I'd like to be able to release that library independently because it might be useful to others.
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How expensive is RTTI?
I understand that there is a resource hit from using RTTI, but how big is it? Everywhere I've looked just says that "RTTI is expensive," but none of them actually give any benchmarks or quantitative data reguarding memory, processor time, or speed.
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What is the LD_PRELOAD trick?
I came across a reference to it recently on proggit and (as of now) it is not explained.
9 Answers
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What is an “unwrapped value” in Swift?
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cantBeNil = nil // can't do this
To get the value from your variable if it is optional, you have to unwrap it. This just means putting an exclamation point at the end.
var canBeNil : Int? = 4
println(canBeNil!)
Your code should look like this:
let optionalSquare: Square? = Square(sideLength: ...