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qmake: could not find a Qt installation of ''
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I got to this SO answer, then found, based on the next error (no qtwebkit installation found) that I also had to run apt-get install qt5-default libqt5webkit5-dev gstreamer1.0-plugins-base gstreamer1.0-tools gstreamer1.0-x as described on the Thoughtbot Github wiki page
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Remove carriage return in Unix
...the simplest way to remove all the carriage returns \r from a file in Unix?
20 Answers
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Check synchronously if file/directory exists in Node.js
How can I synchronously check, using node.js , if a file or directory exists?
15 Answers
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Truly understanding the difference between procedural and functional
...e another. There are languages that fully embrace both styles (LISP, for example). The following scenario may give a sense of some differences in the two styles. Let's write some code for a nonsense requirement where we want to determine if all of the words in a list have an odd number of charact...
Showing the same file in both columns of a Sublime Text window
When I have 2 columns set in a Sublime Text window, can I display the same file in both columns?
9 Answers
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How can I provide multiple conditions for data trigger in WPF?
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Use MultiDataTrigger type
<Style TargetType="ListBoxItem">
<Style.Triggers>
<DataTrigger Binding="{Binding Path=State}" Value="WA">
<Setter Property="Foreground" Value="Red" />
</DataTrigger>
<MultiDataTrigger>...
Using Java 8's Optional with Stream::flatMap
...aving to use a ternary operator (? :) or an if/else statement.
My inline example would be rewritten this way:
Optional<Other> result =
things.stream()
.map(this::resolve)
.flatMap(o -> o.map(Stream::of).orElseGet(Stream::empty))
.findFirst();
An my exam...
How to read a file without newlines?
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This assumption is true in most cases (especially for files created by text editors, which often do add an ending newline anyway).
If you want to avoid this you can add a newline at the end of file:
with open(the_file, 'r+') as f:
f.seek(-1, 2) # go at the end of the file
if f.read(1) !...
How does the Java 'for each' loop work?
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for (Iterator<String> i = someIterable.iterator(); i.hasNext();) {
String item = i.next();
System.out.println(item);
}
Note that if you need to use i.remove(); in your loop, or access the actual iterator in some way, you cannot use the for ( : ) idiom, since the actual ite...
How to load db:seed data into test database automatically?
...eed rake task primarily just loads the db/seeds.rb script. Therefore just execute that file to load the data.
load "#{Rails.root}/db/seeds.rb"
# or
Rails.application.load_seed
Where to place that depends on what testing framework you are using and whether you want it to be loaded before every t...