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do { … } while (0) — what is it good for? [duplicate]
...dition)
FOO(x);
else // syntax error here
...;
Even using braces doesn't help:
#define FOO(x) { foo(x); bar(x); }
Using this in an if statement would require that you omit the semicolon, which is counterintuitive:
if (condition)
FOO(x)
else
...
If you define FOO like this:
#...
How do I put variables inside javascript strings?
That's how you do it in python. How can you do that in javascript/node.js?
13 Answers
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How do I create a message box with “Yes”, “No” choices and a DialogResult?
...plish this. It is simple, but since there is no DialogResult returned, how do I retrieve the result?
11 Answers
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How do I return early from a rake task?
I have a rake task where I do some checks at the beginning, if one of the checks fails I would like to return early from the rake task, I don't want to execute any of the remaining code.
...
Iterate through every file in one directory
How do I write a loop in ruby so that I can execute a block of code on each file?
8 Answers
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Asynchronous Requests with Python requests
I tried the sample provided within the documentation of the requests library for python.
12 Answers
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How to iterate over arguments in a Bash script
...
Use "$@" to represent all the arguments:
for var in "$@"
do
echo "$var"
done
This will iterate over each argument and print it out on a separate line. $@ behaves like $* except that when quoted the arguments are broken up properly if there are spaces in them:
sh test.sh 1 2...
Swift: Testing optionals for nil
...
In Xcode Beta 5, they no longer let you do:
var xyz : NSString?
if xyz {
// Do something using `xyz`.
}
This produces an error:
does not conform to protocol 'BooleanType.Protocol'
You have to use one of these forms:
if xyz != nil {
// Do something ...
What kinds of patterns could I enforce on the code to make it easier to translate to another program
I am setting out to do a side project that has the goal of translating code from one programming language to another. The languages I am starting with are PHP and Python (Python to PHP should be easier to start with), but ideally I would be able to add other languages with (relative) ease. The plan ...
Rails: fields_for with index?
Is there a method (or way to pull off similar functionality) to do a fields_for_with_index ?
9 Answers
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