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How to play with Control.Monad.Writer in haskell?
...Learn You a Haskell , but when I went through this chapter , I got stuck with the program below:
3 Answers
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Is there any difference between the `:key => “value”` and `key: “value”` hash notations?
... this is okay in Ruby2.2+
h[s:] = 42
You can also use anything as a key with => so you can do this:
h = { C.new => 11 }
h = { 23 => 'pancakes house?' }
but you can't do this:
h = { C.new: 11 }
h = { 23: 'pancakes house?' }
The JavaScript style (key: value) is only useful if all of y...
How to use ng-repeat for dictionaries in AngularJs?
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You can use
<li ng-repeat="(name, age) in items">{{name}}: {{age}}</li>
See ngRepeat documentation. Example: http://jsfiddle.net/WRtqV/1/
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How do you find the row count for all your tables in Postgres
... for all my tables in Postgres. I know I can do this one table at a time with:
15 Answers
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Integrate ZXing in Android Studio
...the input all over, I will give you a hint on what worked for me - because it turned out to be very easy.
There is a real handy git repository that provides the zxing android library project as an AAR archive.
https://github.com/journeyapps/zxing-android-embedded
All you have to do is add this ...
Path of assets in CSS files in Symfony 2
I have a CSS file with some paths in it (for images, fonts, etc.. url(..) ).
6 Answers
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POSTing a @OneToMany sub-resource association in Spring Data REST
... have a Spring Boot application using Spring Data REST. I have a domain entity Post which has the @OneToMany relationship to another domain entity, Comment . These classes are structured as follows:
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How do I apply a perspective transform to a UIView?
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As Ben said, you'll need to work with the UIView's layer, using a CATransform3D to perform the layer's rotation. The trick to get perspective working, as described here, is to directly access one of the matrix cells of the CATransform3D (m34). Matrix math h...
How Pony (ORM) does its tricks?
...--+--------------+-------+---------
1 |john@example.com |*** |John Smith |USA |address 1
2 |matthew@example.com|*** |Matthew Reed |USA |address 2
4 |rebecca@example.com|*** |Rebecca Lawson|USA |address 4
The select() function accepts a python generator as argument, and t...
Replace selector images programmatically
...could just keep two of them on hand, or create a different one as you need it.
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