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Difference between Destroy and Delete
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Basically destroy runs any callbacks on the model while delete doesn't.
From the Rails API:
ActiveRecord::Persistence.delete
Deletes the record in the database and freezes this instance to reflect that no changes should be made (since they can't be persisted). Returns the frozen i...
What is the difference between iterator and iterable and how to use them?
...imple representation of a series of elements that can be iterated over. It does not have any iteration state such as a "current element". Instead, it has one method that produces an Iterator.
An Iterator is the object with iteration state. It lets you check if it has more elements using hasNext() a...
ActiveRecord: size vs count
...haven't anything loaded, use count to make a count query on your db
if you don't want to bother with these considerations, use size which will adapt
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Does a `+` in a URL scheme/host/path represent a space?
... Is this also the case outside of the query string region? That is to say, does the following URL:
6 Answers
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Best Practices: working with long, multiline strings in PHP?
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You should use HEREDOC or NOWDOC.
$var = "some text";
$text = <<<EOT
Place your text between the EOT. It's
the delimiter that ends the text
of your multiline string.
$var
EOT;
The difference between Heredoc and Nowdoc is tha...
Redirect all output to file [duplicate]
...t is written to stderr, use 2> to redirect it. For example:
foo > stdout.txt 2> stderr.txt
or if you want in same file:
foo > allout.txt 2>&1
Note: this works in (ba)sh, check your shell for proper syntax
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What exactly is the meaning of an API? [closed]
...A BIOS interrupt call
OpenGL which is often exposed as a C library
Core Windows system calls: WinAPI
The Classes and Methods in Ruby's core library
The Document Object Model exposed by browsers to JavaScript
Web services, such as those provided by Facebook's Graph API
An implementation of a protocol...
Sublime Text from Command Line
...e, in my case I copied it
from C:\Program Files\Sublime Text 3
to C:\Windows\System32
You may then use in your terminal/console subl as a command to open whatever file, such as in your example:
subl file.rb
Or you may as well modify your system PATH variable to include sublime's instalation fo...
How can I use swift in Terminal?
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sudo xcode-select -switch /Applications/Xcode.app/Contents/Developer
then you can do one of these:
xcrun swift
lldb --repl
As of Xcode 6.1 - typing swift in the terminal launches the REPL as well.
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Run a task every x-minutes with Windows Task Scheduler [closed]
I'm trying to get Windows Task Scheduler to run a particular .exe every 10 minutes or so, but the options only allow for once a day execution.
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