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How to store standard error in a variable
...up a couple of extra file descriptors to manage the redirections needed in order to do this.
#!/bin/bash
exec 3>&1 4>&2 #set up extra file descriptors
error=$( { ./useless.sh | sed 's/Output/Useless/' 2>&4 1>&3; } 2>&1 )
echo "The message is \"${error}.\""
exec...
In vim, how do I get a file to open at the same line number I closed it at last time?
...
From Ubuntu's /etc/vim/vimrc file, this example is commented out:
" Uncomment the following to have Vim jump to the last position when
" reopening a file
if has("autocmd")
au BufRead...
What does .class mean in Java?
...the class Print on runtime. It is the same object that is returned by the getClass() method of any (direct) instance of Print.
Print myPrint = new Print();
System.out.println(Print.class.getName());
System.out.println(myPrint.getClass().getName());
...
How and where are Annotations used in Java?
...de a method inherited from a base class. This annotation may be helpful in order to avoid the common mistake, where you actually intend to override a method, but fail to do so, because the signature given in your method does not match the signature of the method being overridden:
class Foo {
@...
String comparison in Python: is vs. == [duplicate]
...or all built-in Python objects (like
strings, lists, dicts, functions,
etc.), if x is y, then x==y is also
True.
Not always. NaN is a counterexample. But usually, identity (is) implies equality (==). The converse is not true: Two distinct objects can have the same value.
Also, is it g...
Pros and cons of using sbt vs maven in Scala project [closed]
... of requirements or a description of your environment, previous knowledge, etc.
FWIW, there are more opinions in this scala mailing list thread.
My 2c are: Go with sbt if you don't have specific requirements
for simple projects, it's totally effortless (you don't even need a build file until you...
Git: How to rebase to a specific commit?
...you don't need this. Note that you must have specified <Upstream> in order to specify <Branch> or git will think you are specifying <Upstream>.
<Target> is the commit we will attach our string of commits to. When providing a branch name, you are simply specifying the head co...
Convert object to JSON in Android
...elimiters of objects and arrays.
The tokens are traversed in depth-first order, the same order that
they appear in the JSON document. Within JSON objects, name/value
pairs are represented by a single token.
share
...
Difference between innerText, innerHTML, and childNodes[].value?
...
It also converts &lt; to <, &gt; to >, etc.
– SarcasticSully
Jan 10 '18 at 16:08
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show 1 more comment
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Apply pandas function to column to create multiple new columns?
... updating the row directly like this ended up being surprisingly slow - an order of magnitude slower than the apply with 'expand' + pd.concat solutions
– Dmytro Bugayev
Jun 30 at 17:33
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