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What is a sealed trait?
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A sealed trait can be extended only in the same file as its declaration.
They are often used to provide an alternative to enums. Since they can be only extended in a single file, the compiler knows every possible subtypes and can reason about it.
For instance with the de...
Why call git branch --unset-upstream to fixup?
...'s why it is always a good idea to initialize your new repository with the file README.md, even if it is an empty file
– Ahmed Hussein
Mar 4 '19 at 14:33
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rails i18n - translating text with links inside
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Separating text and link in locale.yml file works for a while but with longer text those are hard to translate and maintain as the link is in separate translation-item (as in Simones answer). If you start having many strings/translations with links you can dry it ...
Two versions of python on linux. how to make 2.7 the default
...lier in the list than /usr/bin.
Generally this is done in your shell's rc file, e.g. for bash, you'd put this in .bashrc:
export PATH="/usr/local/bin:$PATH"
This will cause your shell to look first for a python in /usr/local/bin, before it goes with the one in /usr/bin.
(Of course, this means y...
How to access command line parameters?
... .long("config")
.help("Sets a custom config file")
.takes_value(true))
.arg(Arg::with_name("INPUT")
.help("Sets the input file to use")
.required(true)
...
Favicon not showing up in Google Chrome [duplicate]
...display favicons, if it's local (not uploaded to a webserver). Only if the file/icon would be in the downloads directory chrome is allowed to load this data - more information about this can be found here: local (file://) website favicon works in Firefox, not in Chrome or Safari- why?
Renaming
Try...
Good PHP ORM Library?
...an on-the-fly mapper. No code generators. No stupid XML/YAML configuration files. It reads the database schema directly from the backend, so in most CRUD operations you don't even have to extend a base model. It works with all major PDO-supported database engines: MySQL, SQLite, SQL Server/Sybase, ...
pod install -bash: pod: command not found
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Alternatively, you can call . ~/.profile which will setup your ruby env again.
– yincrash
Dec 17 '13 at 0:11
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How to set up a PostgreSQL database in Django
...SER postgres WITH PASSWORD 'YourPassWordHere';
- \q
On your settings.py file you do:
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.postgresql_psycopg2',
'NAME': 'dbname',
'USER': 'postgres',
'PASSWORD': 'postgres',
'HOST': '',
'PORT'...
Byte[] to InputStream or OutputStream
...nnecessary, since they aren't associated with any external resources; e.g. file descriptors, sockets, database connections.)
1 - The setBinaryStream method is really a getter. Go figure.
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