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Random record from MongoDB
... enable geospatial indexing on a collection:
db.docs.ensureIndex( { random_point: '2d' } )
To create a bunch of documents with random points on the X-axis:
for ( i = 0; i < 10; ++i ) {
db.docs.insert( { key: i, random_point: [Math.random(), 0] } );
}
Then you can get a random document f...
Why does viewWillAppear not get called when an app comes back from the background?
...egroundNotification, object: nil)
}
override func viewWillAppear(_ animated: Bool) {
print("view will appear")
}
override func viewDidAppear(_ animated: Bool) {
print("view did appear")
}
// MARK: - Notification oberserver methods
@objc func didBecome...
Ruby: How to turn a hash into HTTP parameters?
...reaks down.
require "addressable/uri"
uri = Addressable::URI.new
uri.query_values = {:a => "a", :b => ["c", "d", "e"]}
uri.query
# => "a=a&b[0]=c&b[1]=d&b[2]=e"
uri.query_values = {:a => "a", :b => [{:c => "c", :d => "d"}, {:e => "e", :f => "f"}]}
uri.query
# ...
Print a string as hex bytes?
...ex (convert str to bytes by calling .encode()).
– mic_e
May 8 '15 at 12:53
8
...
What is the difference between Int and Integer?
...answered May 16 '14 at 21:28
200_success200_success
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...
How to handle Objective-C protocols that contain properties?
...e.
Edit:
You may want to do this more specifically:
@synthesize title = _title;
This will fall in line with how xcode's automatic synthesis creates properties and ivars if you use auto-synthesis, so that way if your class has properties from a protocol and a class, some of your ivars won't have...
Access denied for user 'root'@'localhost' while attempting to grant privileges. How do I grant privi
...ost
User: root
Password:
Select_priv: Y
Insert_priv: Y
Update_priv: Y
Delete_priv: Y
Create_priv: Y
Drop_priv: Y
Reload_priv: Y
Shutdown_priv: Y
Process_priv: Y
...
Versioning SQL Server database
...hema from version N to N+1. (These go in your version control system.) A _version_history_ table, something like
create table VersionHistory (
Version int primary key,
UpgradeStart datetime not null,
UpgradeEnd datetime
);
gets a new entry every time an upgrade script runs which...
Exception thrown in NSOrderedSet generated accessors
... I am getting this error when I try to implement this work-around.. [__NSArrayI isEqualToSet:]: unrecognized selector sent to instance... This usually is from a item that has been release, but can't find where, anyone run into this?
– DerekH
Jan 19 '12 at...
How to pass parameters to a partial view in ASP.NET MVC?
...ng is working for me on dotnet 1.0.1:
./ourView.cshtml
@Html.Partial(
"_ourPartial.cshtml",
new ViewDataDictionary(this.ViewData) {
{
"hi", "hello"
}
}
);
./_ourPartial.cshtml
<h1>@this.ViewData["hi"]</h1>
...