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Why is it bad style to `rescue Exception => e` in Ruby?
...e except by kill -9.
Rescuing SyntaxError means that evals that fail will do so silently.
All of these can be shown by running this program, and trying to CTRLC or kill it:
loop do
begin
sleep 1
eval "djsakru3924r9eiuorwju3498 += 5u84fior8u8t4ruyf8ihiure"
rescue Exception
puts "I ...
How do I find files that do not contain a given string pattern?
How do I find out the files in the current directory which do not contain the word foo (using grep )?
16 Answers
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Is it possible to use jQuery .on and hover?
...g JavaScript:
$(".selector").on("mouseover", function () {
//stuff to do on mouseover
});
.hover() has it's own handler: http://api.jquery.com/hover/
If you want to do multiple things, chain them in the .on() handler like so:
$(".selector").on({
mouseenter: function () {
//stuf...
Why git can't do hard/soft resets by path?
...ands provide that functionality already), and it reduces the potential for doing the wrong thing by accident.
A "hard reset" for a path is just done with git checkout HEAD -- <path> (checking out the existing version of the file).
A soft reset for a path doesn't make sense.
A mixed reset fo...
Why are quaternions used for rotations?
... practice. Euler angles use the least memory; matrices use more memory but don't suffer from Gimbal lock and have nice analytical properties; and quaternions strike a nice balance of both, being lightweight, but free from Gimbal lock.
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How do I do word Stemming or Lemmatization?
I've tried PorterStemmer and Snowball but both don't work on all words, missing some very common ones.
21 Answers
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Why does one use dependency injection?
... never a mess; I hardly write virtual functions and interfaces (although I do once in a blue moon) and all my configuration is magically serialized into a class using json.net (sometimes using an XML serializer).
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How do you use variables in a simple PostgreSQL script?
For example, in MS-SQL, you can open up a query window and run the following:
10 Answers
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Set the value of a variable with the result of a command in a Windows batch file
...ment, to set the value of a variable as the result of a command, I usually do:
5 Answers
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When does System.gc() do something?
...JVM may or may not decide to perform garbage collection at that point. How does this work precisely? On what basis/parameters exactly does the JVM decide to do (or not do) a GC when it sees System.gc() ?
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