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Mac zip compress without __MACOSX folder?
... the resource forks. If you create the file with zip, which is a 3rd-party app, then the __MACOSX/ directory never gets created in the first place.
– Edward Falk
Jun 22 '16 at 19:05
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Redis strings vs Redis hashes to represent JSON: efficiency?
...n a single key and keep track of all Objects using a set (or list, if more appropriate). For example:
INCR id:users
SET user:{id} '{"name":"Fred","age":25}'
SADD users {id}
Generally speaking, this is probably the best method in most cases. If there are a lot of fields in the Object, your Objects...
Usages of Null / Nothing / Unit in Scala
...mple is this:
implicit def zeroNull[B >: Null] =
new Zero[B] { def apply = null }
Nothing is used in the definition of None
object None extends Option[Nothing]
This allows you to assign a None to any type of Option because Nothing 'extends' everything.
val x:Option[String] = None
...
Difference between Bridge pattern and Adapter pattern
...t you don't get an insane number of classes. Let's say you have:
MemoryMappedFile and DirectReadFile types of file objects. Let's say you want to be able to read files from various sources (Maybe Linux vs. Windows implementations, etc.). Bridge helps you avoid winding up with:
MemoryMappedWi...
How do I unlock a SQLite database?
...
I caused my sqlite db to become locked by crashing an app during a write. Here is how i fixed it:
echo ".dump" | sqlite old.db | sqlite new.db
Taken from: http://random.kakaopor.hu/how-to-repair-an-sqlite-database
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What package naming convention do you use for personal/hobby projects in Java?
...main name (ie. using com.john as your package name just because your name happens to be John is not a good idea).
If you're going to give the code to anybody else, you should use a globally unique package name, which according to Java conventions means you should register and use a domain name.
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What is Python used for? [closed]
...ython will let you do:
Web Development:
You can use Python to create web applications on many levels of complexity. There are many excellent Python web frameworks including, Pyramid, Django and Flask, to name a few.
Data Analysis:
Python is the leading language of choice for many data scientists...
Reduce, fold or scan (Left/Right)?
...
In general, all 6 fold functions apply a binary operator to each element of a collection. The result of each step is passed on to the next step (as input to one of the binary operator's two arguments). This way we can cumulate a result.
reduceLeft and reduc...
node.js require all files in a folder?
...).forEach(function(file) {
require("./routes/" + file);
});
// Continue application logic here
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What are named pipes?
...tain the credentials of the thing on the other end etc).
Unix named pipes appear as a special file in the filesystem and can be accessed with normal file IO commands including the shell. Windows ones don't, and need to be opened with a special system call (after which they behave mostly like a norm...