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bash: shortest way to get n-th column of output
...dly encounter the following form of columnized output from some command in bash (in my case from executing svn st in my Rails working directory):
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Is it possible to assign numeric value to an enum in Java?
Is anything like this possible in Java? Can one assign custom numeric values to enum elements in Java?
5 Answers
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Can I call a constructor from another constructor (do constructor chaining) in C++?
... constructors).
The syntax is slightly different from C#:
class Foo {
public:
Foo(char x, int y) {}
Foo(int y) : Foo('a', y) {}
};
C++03: No
Unfortunately, there's no way to do this in C++03, but there are two ways of simulating this:
You can combine two (or more) constructors via defau...
In javascript, is an empty string always false as a boolean?
... of ECMAScript, and ECMAScript language specification clearly defines this behavior:
ToBoolean
The result is false if the argument is the empty String (its length is zero);
otherwise the result is true
Quote taken from http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-262.pdf
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Propagate all arguments in a bash shell script
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Use "$@" instead of plain $@ if you actually wish your parameters to be passed the same.
Observe:
$ cat foo.sh
#!/bin/bash
baz.sh $@
$ cat bar.sh
#!/bin/bash
baz.sh "$@"
$ cat baz.sh
#!/bin/bash
echo Received: $1
echo Received: $2
echo Received: $3
echo Received: $4
$ ./foo.sh first secon...
Why exactly is eval evil?
I know that Lisp and Scheme programmers usually say that eval should be avoided unless strictly necessary. I’ve seen the same recommendation for several programming languages, but I’ve not yet seen a list of clear arguments against the use of eval . Where can I find an account of the potentia...
Calling clojure from java
...ear explanation of how to call Clojure from Java assuming you have already built a jar from the Clojure project and included it in the classpath?
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How do I change Bootstrap 3 column order on mobile layout?
I'm making a responsive layout with a top fixed navbar. Underneath I have two columns, one for a sidebar (3), and one for content (9). Which on desktop looks like this
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returning a Void object
...turn a Void type, when it isn't a primitive? Eg. I currently use null as below.
5 Answers
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Find the division remainder of a number
How could I go about finding the division remainder of a number in Python?
12 Answers
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