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asynchronous vs non-blocking
...rs" your attempt to call it: the only reason for the API to remember is in order to call you back. If you're going to be calling it to re-poll, then you already have to maintain the necessary state to know to make that subsequent call, so the API would add no value by also maintaining state.
...
Get filename and path from URI from mediastore
...ontentResolver().query(contentUri, proj, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
} finally {
if (cursor != null) {
cursor.close();
}
}
}
...
How to filter None's out of List[Option]?
...
someList.filter(_.isDefined) if you want to keep the result type as List[Option[A]]
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Get encoding of a file in Windows
...t\usr\bin.
Example:
C:\Users\SH\Downloads\SquareRoot>file *
_UpgradeReport_Files; directory
Debug; directory
duration.h; ASCII C++ program text, with CRLF line terminators
ipch; directory
main.cpp...
NGinx Default public www location?
...ed/default
and find
server {
listen 80 default;
server_name localhost;
access_log /var/log/nginx/localhost.access.log;
location / {
root /var/www/nginx-default;
index index.html index.htm;
}
The root is the default...
How to use concerns in Rails 4
... the idea is to extract common and / or context specific chunks of code in order to clean up the models and avoid them getting too fat and messy.
As an example, I'll put one well known pattern, the taggable pattern:
# app/models/product.rb
class Product
include Taggable
...
end
# app/models/...
autolayout - make height of view relative to half superview height
...youtConstraint
constraintsWithVisualFormat:@"V:[topLayoutGuide]-0-[_view1]-0-[_view2(==_view1)]-0-[bottomLayoutGuide]"
options:0
metrics:nil
views:viewsDict]];
...
What is a monad?
...ses them pervasively) but can be used in any language which support higher-order functions (that is, functions which can take other functions as arguments).
Arrays in JavaScript support the pattern, so let’s use that as the first example.
The gist of the pattern is we have a type (Array in this ca...
Why can't code inside unit tests find bundle resources?
... Library/
Developer/
CoreSimulator/
Devices/
_UUID_/
data/
Containers/
Bundle/
Application/
_UUID_/
App.app/
Also note the unit test executable is, by default, linked ...
Set the maximum character length of a UITextField
...th] - range.length;
return newLength <= 25;
}
Swift
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
let currentCharacterCount = textField.text?.count ?? 0
if range.length + range.location > curre...