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How to create SBT project with IntelliJ Idea?
I just got started with Scala/LiftWeb/Sbt developing, and I'd like to import a Sbt project in IntelliJ Idea.
Actually, I managed to import my project in two different ways:
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Difference between == and ===
In swift there seem to be two equality operators: the double equals ( == ) and the triple equals ( === ), what is the difference between the two?
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UTF-8 all the way through
...and retrieve values encoded natively in UTF-8. Note that MySQL will implicitly use utf8mb4 encoding if a utf8mb4_* collation is specified (without any explicit character set).
In older versions of MySQL (< 5.5.3), you'll unfortunately be forced to use simply utf8, which only supports a subset o...
How do I create a self-signed certificate for code signing on Windows?
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If you're using an older version such as Windows 7, you'll need to stick with MakeCert or another solution. Some people suggest the Public Key Infrastructure Powershell (PSPKI) Module.
Original Answer
While you can create a self-signed code-signing certificate (SPC - Software Publisher Certificat...
When do you use the “this” keyword? [closed]
I was curious about how other people use the this keyword. I tend to use it in constructors, but I may also use it throughout the class in other methods. Some examples:
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Maximum Java heap size of a 32-bit JVM on a 64-bit OS
The question is not about the maximum heap size on a 32-bit OS, given that 32-bit OSes have a maximum addressable memory size of 4GB, and that the JVM's max heap size depends on how much contiguous free memory can be reserved.
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Lambda function in list comprehensions
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The first one creates a single lambda function and calls it ten times.
The second one doesn't call the function. It creates 10 different lambda functions. It puts all of those in a list. To make it equivalent to the first you need:
[(lambda x: x*x)(x) for x in range(10)]
Or better...
error: Unable to find vcvarsall.bat
...ctions here may be dangerous. Consider using the Visual C++ 2008 Express edition or the purpose-built Microsoft Visual C++ Compiler for Python (details) and NOT using the original answer below. Original error message means the required version of Visual C++ is not installed.
For Windows installat...
Querying DynamoDB by date
I'm coming from a relational database background and trying to work with amazon's DynamoDB
7 Answers
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Semicolons superfluous at the end of a line in shell scripts?
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control operator
A token that performs a control function. It is one of the following symbols:
|| & && ; ;; ( ) | |& <newline>
So, the ; can be metacharacter or control operator, while the ;; is always a control operator (in case command).
In your p...