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Combine two ActiveRecord::Relation objects
...
Relation objects can be converted to arrays. This negates being able to use any ActiveRecord methods on them afterwards, but I didn't need to. I did this:
name_relation = first_name_relation + last_name_relation
Ruby 1.9, rails 3.2
...
How to provide user name and password when connecting to a network share
...P/Invoke WNetAddConnection2. I prefer the latter, as I sometimes need to maintain multiple credentials for different locations. I wrap it into an IDisposable and call WNetCancelConnection2 to remove the creds afterwards (avoiding the multiple usernames error):
using (new NetworkConnection(@"\\serve...
vs
...M". You can also open files and re-save them in UTF-8 using "Encoding > Convert to UTF-8 without BOM".
More on the Byte Order Mark (BOM) at Wikipedia.
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Swift make method parameter mutable?
...nswers is the ability to declare an inout parameter. Think: passing in a pointer.
func reduceToZero(_ x: inout Int) {
while (x != 0) {
x = x-1
}
}
var a = 3
reduceToZero(&a)
print(a) // will print '0'
This can be particularly useful in recursion.
Apple's inout declarati...
Case insensitive comparison of strings in shell script
...{var1,,}" = "${var2,,}" ]; then
echo ":)"
fi
All you're doing there is converting both strings to lowercase and comparing the results.
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How to specify jackson to only use fields - preferably globally
...ust what I needed! This configuration allowed me to use a Mixin to easily convert Hibernate entities to DTOs. By default the ObjectMapper serializes everything and a Mixin would have to specify which properties to ignore (i.e. a subtraction instead of an intersection).
– Tast...
When is “Try” supposed to be used in C# method names?
...r use case would mean that it might throw an exception (such as parsing an int), the TryParse pattern makes sense.
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Resumable downloads when using PHP to send the file?
...('/bytes=(\d+)-(\d+)?/', $_SERVER['HTTP_RANGE'], $matches);
$offset = intval($matches[1]);
$length = intval($matches[2]) - $offset;
} else {
$partialContent = false;
}
$file = fopen($file, 'r');
// seek to the requested offset, this is 0 if it's not a partial content request
fseek($fi...
Using {} in a case statement. Why?
What is the point with using { and } in a case statement? Normally, no matter how many lines are there in a case statement, all of the lines are executed. Is this just a rule regarding older/newer compilers or there is something behind that?
...
How to access command line parameters?
...econd iterated element.
An easy way to deal with the result of args is to convert it to a Vec:
use std::env;
fn main() {
let args: Vec<_> = env::args().collect();
if args.len() > 1 {
println!("The first argument is {}", args[1]);
}
}
You can use the whole standard i...