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how to permit an array with strong parameters
..., Date, Time, DateTime, StringIO, IO,
ActionDispatch::Http::UploadedFile and Rack::Test::UploadedFile.
To declare that the value in params must be an array of permitted scalar values map the key to an empty array:
params.permit(:id => [])
In my app, the category_ids are passed to the c...
How many characters can a Java String have?
...teger.MAX_VALUE part of the spec of JVM dependant?
– andandandand
Jul 24 '09 at 20:40
6
Integer.M...
How to set default value to the input[type=“date”] [duplicate]
...
The date should take the format YYYY-MM-DD. Single digit days and months should be padded with a 0. January is 01.
From the documentation:
A string representing a date.
Value: A valid full-date as defined in [RFC 3339], with the additional qualification that the year component...
Fixed size queue which automatically dequeues old values upon new enques
...
I would write a wrapper class that on Enqueue would check the Count and then Dequeue when the count exceeds the limit.
public class FixedSizedQueue<T>
{
ConcurrentQueue<T> q = new ConcurrentQueue<T>();
private object lockObject = new object();
public int ...
How to change font size on part of the page in LaTeX?
... The first parameter to fontsize is the font size to switch to and the second is the line spacing to use
– Rose Perrone
Feb 20 '14 at 19:00
...
PHP Session Fixation / Hijacking
I'm trying to understand more about PHP Session Fixation and hijacking and how to prevent these problems. I've been reading the following two articles on Chris Shiflett's website:
...
Can I click a button programmatically for a predefined intent?
...splaying UI.
Can I get the "Send" button click from the MMS-SMSProvider in Android?
3 Answers
...
Turning off some legends in a ggplot
...
Note to self: if you have a geom_linerange() and the legend is showing a cross instead of a line, insert show.legend=FALSE inside the geom_linerange().
– PatrickT
Sep 30 '17 at 8:51
...
How to convert a double to long without casting?
... d; // x = 1234
This will be faster than going via the wrapper classes - and more importantly, it's more readable. Now, if you need rounding other than "always towards zero" you'll need slightly more complicated code.
shar...
How do I check if a property exists on a dynamic anonymous type in c#?
... IsPropertyExist(dynamic settings, string name)
{
if (settings is ExpandoObject)
return ((IDictionary<string, object>)settings).ContainsKey(name);
return settings.GetType().GetProperty(name) != null;
}
var settings = new {Filename = @"c:\temp\q.txt"};
Console.WriteLine(...