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An “and” operator for an “if” statement in Bash
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If STATUS is empty, the code from @HTF would have failed on -ne: unary operator expected. In your case, it will fail on integer expression expected, won't it ?
– Julien Vivenot
Nov 16 '12 at 0:28
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How do you discover model attributes in Rails?
...nt?
object.attributes
For instance methods without inheritance from super class
Model.instance_methods(false)
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How to convert a ruby hash object to JSON?
...ndefined method `to_json' for {:make=>"bmw", :year=>"2003"}:Hash
# from (irb):11
# from /usr/bin/irb:12:in `<main>'
require 'json'
# => true
car.to_json
# => "{"make":"bmw","year":"2003"}"
As you can see, requiring json has magically brought method to_json to our Hash.
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@Basic(optional = false) vs @Column(nullable = false) in JPA
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@Xie Jilei: From book: Java persistence with hibernate 2007, p. 179: @Basic(optional = false) @Column(nullable = false) The @Basic annotation marks the property as not optional on the Java object level. The second setting, nullable = f...
find -exec cmd {} + vs | xargs
...tly. Also lots of people do not know this "-exec cmd {} +", as you can see from other answers.
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Should try…catch go inside or outside a loop?
...aught" body of such "catch-all" methods, to more clearly separate the body from the all-enclosing try block.
– Thomas W
Oct 18 '13 at 5:06
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What is the difference between Θ(n) and O(n)?
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@Andy897 It follows from the definition of "proportional". From Wikipedia: "In mathematics, two variables are proportional if a change in one is always accompanied by a change in the other, and if the changes are always related by use of a const...
Java switch statement multiple cases
...esponsibility pattern
allows the separation of the source of
a request from deciding which of the
potentially large number of handlers
for the request should action it. The
class representing the chain role
channels the requests from the source
along the list of handlers until a
hand...
How to run JUnit tests with Gradle?
...lasses with both gradle and you IDE. I use Eclipse, and when running JUnit from it, Eclipse chooses one classpath (the bin directory) whereas gradle chooses another (the build directory). This can lead to confusion if you edit a resource file, and don't see your change reflected at test runtime.
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Get the current file name in gulp.src()
In my gulp.js file I'm streaming all HTML files from the examples folder into the build folder.
6 Answers
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