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Difference between viewDidLoad and viewDidAppear
...er (for instance, when a Modal View Controller is dismissed and the view becomes visible again). This is where you want to perform any layout actions or do any drawing in the UI - for example, presenting a modal view controller. However, anything you do here should be repeatable. It's best not to re...
Why does csvwriter.writerow() put a comma after each character?
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Java system properties and environment variables
...owever they 'can' be set through Java) and system properties are passed as command line options or set via setProperty().
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How to find Array length inside the Handlebar templates?
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Getting the encoding of a Postgres database
...d to know the default encoding for the database. I want to get it from the command line.
6 Answers
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What is the difference between MySQL Server and MySQL Client
...n interact with using a mysql client. You can use the mysql client to send commands to any mysql server; on a remote computer or your own.
The mysql server is used to persist the data and provide a query interface for it (SQL).
The mysql clients purpose is to allow you to use that query interface.
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How to use the new affix plugin in twitter's bootstrap 2.1.0?
...eeding to update the data-offset-top attribute. Since this uses the actual computed position of the element, it also prevents inconsistencies with browsers that render the element at a slightly different position.
You will still need to clamp the element to the top with CSS. Furthermore, I had to...
What's the difference between size_t and int in C++?
...or evaluates to size_t.
The actual type of size_t is platform-dependent; a common mistake is to assume size_t is the same as unsigned int, which can lead to programming errors, particularly as 64-bit architectures become more prevalent.
Also, check Why size_t matters
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R object identification
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I usually start out with some combination of:
typeof(obj)
class(obj)
sapply(obj, class)
sapply(obj, attributes)
attributes(obj)
names(obj)
as appropriate based on what's revealed. For example, try with:
obj <- data.frame(a=1:26, b=letters)
obj <...