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How to sort an ArrayList in Java [duplicate]
...(Fruit fruit) {
//write code here for compare name
}
Then do call sort method
Collections.sort(fruitList);
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Create Directory if it doesn't exist with Ruby
...; ["foo/bar"]
Edit2: you do not have to use FileUtils, you may do system call (update from @mu is too short comment):
> system 'mkdir', '-p', 'foo/bar' # worse version: system 'mkdir -p "foo/bar"'
=> true
But that seems (at least to me) as worse approach as you are using external 'tool' w...
What is “point free” style (in Functional Programming)?
...ble names, you need to compose partially applied functions. That's what we call currying (or, more precisely, what is made possible through currying)
– Dario
Oct 3 '10 at 8:42
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Cast a Double Variable to Decimal
... @PeterRitchie thread is a bit old but this should be said: Calling the Convert method directly would be the more appropriate approach. Maybe I'm just an optimization freak but one less instruction to resolve is a bonus (since using the explicit (Type) cast syntax is just an operator ...
How does Rails keep track of which migrations have run for a database?
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Rails creates a table in your database called schema_migrations to keep track of which migrations have run.
The table contains a single column, version. When Rails runs a migration, it takes the leading digits in the migration's file name and inserts a row for th...
How can I download a specific Maven artifact in one command line?
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Here's what worked for me to download the latest version of an artifact called "component.jar" with Maven 3.1.1 in the end (other suggestions did not, mostly due to maven version changes I believe)
This actually downloads the file and copies it into the local working directory
From bash:
mvn d...
What is hashCode used for? Is it unique?
...er is based on the
System.Collections.IEqualityComparer interface.
Basically, hash codes exist to make hashtables possible.
Two equal objects are guaranteed to have equal hashcodes.
Two unequal objects are not guaranteed to have unequal hashcodes (that's called a collision).
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Override ActiveRecord attribute methods
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The long and short of it is that ActiveRecord does correctly handle super calls for ActiveRecord attribute accessors.
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Git stash twice
...P on master: 50cf63b Commit message B
If you made two stashes, then just call git stash pop twice. As opposed to git stash apply, pop applies and removes the latest stash.
You can also reference a specific stash, e.g.
git stash show stash@{1}
or
git stash apply stash@{1}
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jQuery slide left and show
I extended the jQuery effects called slideRightShow() and slideLeftHide() with a couple functions that work similarly to slideUp() and slideDown() as seen below. However, I would also like to implement slideLeftShow() and slideRightHide() .
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