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What is the argument for printf that formats a long?
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On most platforms, long and int are the same size (32 bits). Still, it does have its own format specifier:
long n;
unsigned long un;
printf("%ld", n); // signed
printf("%lu", un); // unsigned
For 64 bits, you'd want a long long:
long long n;
uns...
What is the meaning of erb?
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erb stands for "Embedded RuBy". A .html.erb or .erb.html file is HTML with Ruby code embedded in; Rails will evaluate the Ruby to add content to the file dynamically, and will output a "pure" HTML file for rendering.
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node.js shell command execution
...ng to grasp the finer points of how I can run a linux or windows shell command and capture output within node.js; ultimately, I want to do something like this...
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What is a callback?
What's a callback and how is it implemented in C#?
11 Answers
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How to remove application from app listings on Android Developer Console
Is there any way to unpublish and then permanently remove an application from the list of applications on Android Developer Console?
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What is an abstract class in PHP?
...act method, which is a method without any actual code in it, just the name and the parameters, and that has been marked as "abstract".
The purpose of this is to provide a kind of template to inherit from and to force the inheriting class to implement the abstract methods.
An abstract class thus is...
Convert to/from DateTime and Time in Ruby
How do you convert between a DateTime and a Time object in Ruby?
6 Answers
6
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When is an interface with a default method initialized?
....4.1 ought to cover this definitively. However, the behavior of Oracle JDK and OpenJDK (javac and HotSpot) differs from what's specified here. In particular, the Example 12.4.1-3 from this section covers interface initialization. The example as follows:
interface I {
int i = 1, ii = Test.out("i...
How does std::move() transfer values into RValues?
I just found myself not fully understanding the logic of std::move() .
2 Answers
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appending array to FormData and send via AJAX
I'm using ajax to submit a multipart form with array, text fields and files.
9 Answers
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