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What's the shebang/hashbang (#!) in Facebook and new Twitter URLs for?
...ve just noticed that the long, convoluted Facebook URLs that we're used to now look like this:
7 Answers
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JPA CascadeType.ALL does not delete orphans
... all child elements
delete main row
close session
With JPA 2.0, you can now use the option orphanRemoval = true
@OneToMany(mappedBy="foo", orphanRemoval=true)
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Unit testing code with a file system dependency
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Yay! Now it's testable; I can feed in test doubles (mocks) to the DoIt method. But at what cost? I've now had to define 3 new interfaces just to make this testable. And what, exactly, am I testing? I'm testing that my DoIt functio...
Using the Swift if let with logical AND operator &&
We know that we can use an if let statement as a shorthand to check for an optional nil then unwrap.
6 Answers
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jQuery date/time picker [closed]
... "VERY buggy"? Hardly. I use it in production code, and have for a while now. It's also actively developed.
– Sonny
Jan 6 '11 at 15:16
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Why does ('0' ? 'a' : 'b') behave different than ('0' == true ? 'a' : 'b') [duplicate]
...the empty String (its length is zero);
otherwise the result is true.
Now to '0' == true.
Two type conversions will take place here. We can follow this in the specification, section 11.9.3, The Abstract Equality Comparison Algorithm.
The operands are denoted as x and y (x == y).
In our case...
Proper indentation for Python multiline strings
...iable name from string to text or anything of a different length, then you now need to update the indentation of literally every single line of the multiline string just to get it to match up with the """ properly. Indentation strategy should not complicate future refactors/maintenance, and it's one...
Recompile Heroku slug without push or config change
...oned such a command, so I'm presuming your answer is spot on, at least for now. Thanks!
– Nathan
Mar 21 '12 at 2:50
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Docker build “Could not resolve 'archive.ubuntu.com'” apt-get fails to install anything
...un Docker build on various files which previously worked before, which are now no longer working.
14 Answers
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filter for complete cases in data.frame using dplyr (case-wise deletion)
... are a lot of variables and b) impossible when the variable names are not known (e.g. in a function that processes any data.frame).
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