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Laravel Eloquent Sum of relation's column
...all sum on a collection object, rather than on the builder object returned by products(). It's worth clarifying which one you mean here, and ideally provide a link to explain both.
– Benubird
Nov 5 '14 at 10:59
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Observer Design Pattern vs “Listeners”
...ing design, the implementation of a given pattern will often be influenced by the language and platform being used. As such, a particular implementation of the Observer pattern within a given framework (which may happen to use the term "listener" to describe the role of the ConcreteObserver) might ...
How to create ENUM type in SQLite?
...ntation does not fully emulate enum because it makes it impossible to sort by the integer index of the values (which is possible with an actual enum field). Just, everyone, keep that in mind.
– Boris D. Teoharov
Dec 12 '19 at 15:07
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JetBrains / IntelliJ keyboard shortcut to collapse all methods
...de > Folding > Expand all to level > 1
I managed to achieve this by using the menu option Code > Folding > Expand all to level > 1.
I re-assigned it to Ctrl+NumPad-1 which gives me a quick way to collapse my classes down to their methods.
This works at the 'block level' of the ...
Laravel Check If Related Model Exists
...no one-fits-all method for all relations. Use query method instead as @tremby provided below:
$model->relation()->exists()
generic solution working on all the relation types (pre php 7.2):
if (count($model->relation))
{
// exists
}
This will work for every relation since dynamic p...
Mercurial for Beginners: The Definitive Practical Guide
Inspired by Git for beginners: The definitive practical guide.
22 Answers
22
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Difference between exit(0) and exit(1) in Python
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Note that according to the docs, exit() is added by the site module, and should not be used by programs. Instead, use sys.exit(), or even raise SystemExit, if you don't want to import another module.
– daviewales
Aug 22 '19 at 5:00
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What is the exact meaning of IFS=$'\n'?
... linebreak - it's the letter n (in the first case) or a backslash followed by the letter n (in the other two cases).
$'somestring' is a syntax for string literals with escape sequences. So unlike '\n', $'\n' actually is a linebreak.
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Using only CSS, show div on hover over
...inside the same parent display:block. It might be a better idea to select by .class-name or by #id. Otherwise, good post.
– Nate
Jun 6 '12 at 22:59
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What is the relationship between the docker host OS and the container base image OS?
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As mentioned by BraveNewCurrency, the only relationship between the host OS and the container is the Kernel.
It is one of the main difference between docker and 'regular' virtual machines, there is no overhead, everything takes place dir...