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Why are there two kinds of functions in Elixir?
...rent number of arguments:
fn
x, y -> x + y
x -> x
end
** (SyntaxError) cannot mix clauses with different arities in function definition
Oh no! We get an error! We cannot mix clauses that expect a different number of arguments. A function always has a fixed arity.
Now, let's talk about ...
Standard alternative to GCC's ##__VA_ARGS__ trick?
...o reliably test if there are too many arguments (so that a useful compiler error message can be printed, rather than a strange failure).
– Richard Hansen
Apr 20 '13 at 1:25
ad...
mongodb group values by multiple fields
...));
log({ topaddr });
client.close();
} catch(e) {
console.error(e)
} finally {
process.exit()
}
})()
books.json
{ "addr": "address1", "book": "book1" }
{ "addr": "address2", "book": "book1" }
{ "addr": "address1", "book": "book5" }
{ "addr": "address3", "book": "boo...
Reading output of a command into an array in Bash
... should be #!/bin/bash - if run as #!/bin/sh, bash will exit with a syntax error.
– Gene Pavlovsky
Apr 19 '16 at 20:37
1
...
What's the difference between __PRETTY_FUNCTION__, __FUNCTION__, __func__?
...ol>(void)
Using of __PRETTY_FUNCTION__ triggers undeclared identifier error, as expected.
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stringstream, string, and char* conversion confusion
...; cstr1 // Prints correctly
<< cstr2; // No more error : cstr2 points to resultstr memory that is still alive as we used the const reference to keep it for a time.
system("PAUSE");
return 0;
}
That way you get the string for a longer time.
Now, you have to know...
Simple explanation of MapReduce?
...ace. These factor summed with transparent failure handling for most of the errors made this framework so popular.
A little more depth on the paper:
MapReduce was originally mentioned in a Google paper (Dean & Ghemawat, 2004 – link here) as a solution to make computations in Big Data using a pa...
What are Vertex Array Objects?
... at all, not even vertexes, so if you try to draw it, you'll get an OpenGL error. This is reasonably sane, as in "initialize everything to False/NULL/zero".
You only need to glEnableClientState when you set things up. The VAO remembers the enable/disable state for each pointer.
Yes the VAO will st...
What should I use Android AccountManager for?
...ovider in a background thread, preventing Application Not Responsive (ANR) errors while not requiring you to explicitly handle threading.
ContentProvider ties into ContentResolver's observer: this means it is easy to notify views when content is changed
Bottom line: the framework AccountManager / ...
When to use Mockito.verify()?
...r @Service - it delegates all calls to the @Service (and making some extra error handling). In this case calling to Mockito.verify() is essential, you shouldn't duplicate all of your checks that you did for the @Serive, verifying that you're calling to @Service with correct parammeter list is suffic...