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Rails params explained?
...example, if the user's browser requested
http://www.example.com/?vote[item_id]=1&vote[user_id]=2
then params[:vote] would be a hash, params[:vote][:item_id] would be "1" and params[:vote][:user_id] would be "2".
The Ruby on Rails params are the equivalent of the $_REQUEST array in PHP.
...
MongoDB and “joins” [duplicate]
...is to do it manually, as you have almost described. Just save a document's _id in another document's other_id, then write your own function to resolve the relationship. The other solution is to use DBRefs as described on the manual page above, which will make MongoDB resolve the relationship client-...
What is the Swift equivalent to Objective-C's “@synchronized”?
...d on some of the code I've seen from Matt Bridges and others.
func synced(_ lock: Any, closure: () -> ()) {
objc_sync_enter(lock)
closure()
objc_sync_exit(lock)
}
Usage is pretty straight forward
synced(self) {
println("This is a synchronized closure")
}
There is one problem...
Read entire file in Scala?
...rt into any file which requires file manipulation:
import scala.io.Source._
With this, you can now do:
val lines = fromFile("file.txt").getLines
I would be wary of reading an entire file into a single String. It's a very bad habit, one which will bite you sooner and harder than you think. Th...
Node.js Logging
...on: false, timestamp: true }),
new winston.transports.File({ filename: __dirname + '/debug.log', json: false })
],
exceptionHandlers: [
new (winston.transports.Console)({ json: false, timestamp: true }),
new winston.transports.File({ filename: __dirname + '/exceptions.log', json: fal...
What's the simplest way to subtract a month from a date in Python?
...with param month doesn't work but months works In [23]: created_datetime__lt - relativedelta(months=1) Out[23]: datetime.datetime(2016, 11, 29, 0, 0, tzinfo=<StaticTzInfo 'Etc/GMT-8'>) In [24]: created_datetime__lt - relativedelta(month=1) Out[24]: datetime.datetime(2016, 1, 29,...
How do I get PyLint to recognize numpy members?
...en with the latest versions of all related packages (astroid 1.3.2, logilab_common 0.63.2, pylon 1.4.0).
The following solution worked like a charm: I added numpy to the list of ignored modules by modifying my pylintrc file, in the [TYPECHECK] section:
[TYPECHECK]
ignored-modules = numpy
Depend...
Symfony 2: How do I check if a user is not logged in inside a template?
...OT logged in you can use: {% if not app.user %}
– Mac_Cain13
Feb 11 '13 at 15:49
44
Use {% if is_...
Targeting only Firefox with CSS
...nger works as of Firefox 59, released March 2018: bugzilla.mozilla.org/show_bug.cgi?id=1035091
– Jordan Gray
Dec 17 '19 at 17:16
|
show 8 mo...
Copy a table from one database to another in Postgres
...
Extract the table and pipe it directly to the target database:
pg_dump -t table_to_copy source_db | psql target_db
Note: If the other database already has the table set up, you should use the -a flag to import data only, else you may see weird errors like "Out of memory":
pg_dump -a -t ...