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How to create directories recursively in ruby?
...se directories exist and need to recursively create them if necessary.
How can one do this in ruby?
6 Answers
...
Create module variables in Ruby
...able to be accessed without initializing an instance of the module, but it can be changed (unlike constants in modules).
4 ...
Set custom attribute using JavaScript
...de.google.com/p/dynatree) but I am having some problems and hoping someone can help..
3 Answers
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Permanently adding a file path to sys.path in Python
I had a file called example_file.py , which I wanted to use from various other files, so I decided to add example_file.py to sys.path and import this file in another file to use the file. To do so, I ran the following in IPython.
...
Java: int array initializes with nonzero elements
...are faced with a bug in the JIT-compiler. Compiler determines that the allocated array is filled after allocation in Arrays.fill(...), but the check for uses between the allocation and the fill is faulty. So, compiler performs an illegal optimization - it skips zeroing of allocated array.
This bug ...
How do I sort an array of hashes by a value in the hash?
... but there's no in-place variant for sort_by in Ruby 1.8. In practice, you can do:
sorted = sort_me.sort_by { |k| k["value"] }
puts sorted
As of Ruby 1.9+, .sort_by! is available for in-place sorting:
sort_me.sort_by! { |k| k["value"]}
...
Declaration suffix for decimal type
...
Documented in the C# language specification, chapter 2.4.4:
float f = 1.2f;
double d = 1.2d;
uint u = 2u;
long l = 2L;
ulong ul = 2UL;
decimal m = 2m;
Nothing for int, byte, sbyte, short, ushort.
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Line continuation for list comprehensions or generator expressions in python
...
[x
for
x
in
(1,2,3)
]
works fine, so you can pretty much do as you please. I'd personally prefer
[something_that_is_pretty_long
for something_that_is_pretty_long
in somethings_that_are_pretty_long]
The reason why \ isn't appreciated very much is that it appe...
In CoffeeScript how do you append a value to an Array?
...often doing something quite like an array comprehension anyway. Not in all cases, admittedly, but a lot of the time.
– suranyami
Feb 26 '12 at 8:32
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swift case falling through
...
Yes. You can do so as follows:
var testVal = "hello"
var result = 0
switch testVal {
case "one", "two":
result = 1
default:
result = 3
}
Alternatively, you can use the fallthrough keyword:
var testVal = "hello"
var result...