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In Objective-C why should I check if self = [super init] is not nil?
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53
For example:
[[NSData alloc] initWithContentsOfFile:@"this/path/doesn't/exist/"];
[[NSImage all...
How to convert a ruby hash object to JSON?
...though).
So, take a look here:
car = {:make => "bmw", :year => "2003"}
# => {:make=>"bmw", :year=>"2003"}
car.to_json
# NoMethodError: undefined method `to_json' for {:make=>"bmw", :year=>"2003"}:Hash
# from (irb):11
# from /usr/bin/irb:12:in `<main>'
require 'json'
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How to grep (search) committed code in the Git history
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edited May 3 at 4:17
Nickolay
27.1k77 gold badges8787 silver badges152152 bronze badges
a...
An error occurred while validating. HRESULT = '8000000A'
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53
This is a known issue in Visual Studio 2010 (a race condition). See this connect item.
We've ru...
How to rename with prefix/suffix?
How do I do mv original.filename new.original.filename without retyping the original filename?
9 Answers
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Passing command line arguments to R CMD BATCH
...from the command line looks like
> Rscript myScript.R 5 100
[1] 98.46435 100.04626 99.44937 98.52910 100.78853
Edit:
Not that I'd recommend it, but ... using a combination of source() and sink(), you could get Rscript to produce an .Rout file like that produced by R CMD BATCH. One way w...
Move an item inside a list?
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answered Jul 3 '10 at 23:15
David ZDavid Z
111k2323 gold badges218218 silver badges256256 bronze badges
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Equivalent of typedef in C#
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349
No, there's no true equivalent of typedef. You can use 'using' directives within one file, e.g...
Fade Effect on Link Hover?
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327
Nowadays people are just using CSS3 transitions because it's a lot easier than messing with JS...
Checking if a string can be converted to float in Python
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316
I would just use..
try:
float(element)
except ValueError:
print "Not a float"
..it'...