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How to map and remove nil values in Ruby
...ap { |x| process_x url }
"Ruby 2.7 adds Enumerable#filter_map" is a good read on the subject, with some performance benchmarks against some of the earlier approaches to this problem:
N = 1_00_000
enum = 1.upto(1_000)
Benchmark.bmbm do |x|
x.report("select + map") { N.times { enum.select { |i| ...
How can I calculate an md5 checksum of a directory?
... ls -alR dir | md5sum . This is even better no compression just a read. It is unique because the content contains the mod time and size of file ;)
– Sid
Oct 3 '12 at 1:14
...
Java Enum Methods - return opposite direction enum
...
For a small enum like this, I find the most readable solution to be:
public enum Direction {
NORTH {
@Override
public Direction getOppositeDirection() {
return SOUTH;
}
},
SOUTH {
@Override
public Direc...
Get user info via Google API
...rvice.Scope.PlusLogin,"https://www.googleapis.com/auth/plus.profile.emails.read" }
});
TokenResponse _token = flow.ExchangeCodeForTokenAsync("", code, "postmessage",
CancellationToken.None).Result;
// Cre...
Is there a destructor for Java?
...ave a look at the try-with-resources statement. For example:
try (BufferedReader br = new BufferedReader(new FileReader(path))) {
System.out.println(br.readLine());
} catch (Exception e) {
...
} finally {
...
}
Here the resource that is no longer needed is freed in the BufferedReader.close(...
What do 'statically linked' and 'dynamically linked' mean?
...k if the updates are incompatible - this is sometimes responsible for the dreaded "DLL hell" that some people mention in that applications can be broken if you replace a dynamically linked library with one that's not compatible (developers who do this should expect to be hunted down and punished sev...
Why would a static nested interface be used in Java?
... say this because I like to keep my classes short and to the point. Also a reader can see what other entities are related to a class by looking at the classes in the package. I'd probably have a package java.collections.map for maps. This is about OO and modularity. java.util has too much in it. uti...
Getting the first character of a string with $str[0]
...orter and is easier to remember than substr($str, 0, 1), this confuses who reads the code.
– trante
Nov 2 '13 at 10:13
10
...
install / uninstall APKs programmatically (PackageManager vs Intents)
...rings up the standard Android install/remove dialogs. Those details have already been handled - I'm looking for the "just **** install this package" and "just **** remove this package" functions, literally no questions asked.
– dascandy
Oct 11 '11 at 7:37
...
How to create and write to a txt file using VBA
....WriteLine("Enter Text")
Console.WriteLine("")
SaveVar = Console.ReadLine
My.Computer.FileSystem.WriteAllText("N:\A-Level Computing\2017!\PPE\SaveFile\SaveData.txt", "Text: " & SaveVar & ", ", True)
Console.WriteLine("")
Console.WriteLine("File Saved")
Console.W...