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Change a Rails application to production
...ails application to run in production mode? Is there a config file, environment.rb for example, to do that?
15 Answers
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Load RSA public key from file
...blic class PrivateKeyReader {
public static PrivateKey get(String filename)
throws Exception {
byte[] keyBytes = Files.readAllBytes(Paths.get(filename));
PKCS8EncodedKeySpec spec =
new PKCS8EncodedKeySpec(keyBytes);
KeyFactory kf = KeyFactory.getInstance("RSA");
return k...
UICollectionView spacing margins
...s it possible to do that using UICollectionViewFlowLayout or must I implement my own UICollectionViewLayout ?
15 Answers...
Xcode/Simulator: How to run older iOS version?
...
Oh sorry, i'm running on 4.1 where you can set the deployment target to 3.0.
– ingh.am
Nov 23 '10 at 23:22
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In a bootstrap responsive page how to center a div
...
UPDATE for Bootstrap 4
Simpler vertical grid alignement with flex-box
@import url('https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css');
html,
body {
height: 100%
}
<div class="h-100 row align-items-center">
<div class="col" ...
iterating over and removing from a map [duplicate]
...e behaviour of removeIf on map.values()? it removes all the key->val elements pointing to such value?
– Marco Servetto
May 19 at 2:54
add a comment
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How to prevent form from being submitted?
I have a form that has a submit button in it somewhere.
10 Answers
10
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How to loop through all enum values in C#? [duplicate]
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Yes you can use the GetValues method:
var values = Enum.GetValues(typeof(Foos));
Or the typed version:
var values = Enum.GetValues(typeof(Foos)).Cast<Foos>();
I long ago added a helper function to my private library for just such an occasion:
...
Convert to binary and keep leading zeros in Python
...formatted string literal (3.6+) or use str.format() and put the second argument for the format() function after the colon of the placeholder {:..}:
>>> value = 14
>>> f'The produced output, in binary, is: {value:#010b}'
'The produced output, in binary, is: 0b00001110'
>>>...
LINQ query on a DataTable
...inst the DataTable's Rows collection, since DataRowCollection doesn't implement IEnumerable<T>. You need to use the AsEnumerable() extension for DataTable. Like so:
var results = from myRow in myDataTable.AsEnumerable()
where myRow.Field<int>("RowNo") == 1
select myRow;
And as @Keith ...