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Case objects vs Enumerations in Scala
...es. However, I find in general that enumerations are a bit clumsy in Scala and have the feel of an awkward add-on, so I now tend to use case objects. A case object is more flexible than an enum:
sealed trait Currency { def name: String }
case object EUR extends Currency { val name = "EUR" } //etc.
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Easiest way to check for an index or a key in an array?
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To check if the element is set (applies to both indexed and associative array)
[ ${array[key]+abc} ] && echo "exists"
Basically what ${array[key]+abc} does is
if array[key] is set, return abc
if array[key] is not set, return nothing
References:
See Parameter Expa...
What's the point of having pointers in Go?
...ences (with appropriate const or mutable qualifiers). Now we have pointers and for some built-in types like maps and channels implicit pass by reference.
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Force Intellij IDEA to reread all maven dependencies
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Press Ctrl+Shift+A to find actions, and input "reimport", you will find the "Reimport All Maven Projects".
On a Mac, use ⌘+⇧+A instead.
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How can I change my default database in SQL Server without using MS SQL Server Management Studio?
...r Management Studio by using the 'options' button in the connection dialog and selecting 'master' as the database to connect to. However, whenever I try to do anything in object explorer, it tries to connect using my default database and fails.
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Select last row in MySQL
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I just ran this over 20m rows and it was very fast. I assume there's some kind of special case for handling this query. (EDIT: MySQL 5.7, InnoDB engine)
– Daniel Buckmaster
Oct 29 '18 at 2:20
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How do you check “if not null” with Eloquent?
...null at deleted field, so I changed this into whereNull('deleted_at') and I got my query running.
– Tarunn
Jun 19 '15 at 12:45
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PHP passing $_GET in linux command prompt
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Typically, for passing arguments to a command line script, you will use either argv global variable or getopt:
// bash command:
// php -e myscript.php hello
echo $argv[1]; // prints hello
// bash command:
// php -e myscript.php -f=world
$opts = getopt('f:');
ec...
Where can I find my Azure account name and account key?
I am starting with Windows Azure. I have an Azure account with Microsoft and would like to use it from my Visual Studio project
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How to format a UTC date as a `YYYY-MM-DD hh:mm:ss` string using NodeJS?
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If you're using Node.js, you're sure to have EcmaScript 5, and so Date has a toISOString method. You're asking for a slight modification of ISO8601:
new Date().toISOString()
> '2012-11-04T14:51:06.157Z'
So just cut a few things out, and you're set:
new Date().toISOString().
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