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How do I parse JSON with Ruby on Rails? [duplicate]
...nsions. You can use it with
require 'json'
JSON.parse ''{ "x": "y" }'
# => {"x"=>"y"}
The parse! variant can be used for safe sources. There are also other gems, which may be faster than the default implementation. Please refer to multi_json for the list.
Rails
Modern versions of Rails us...
In Python, how do I index a list with another list?
...
If you are using numpy, you can perform extended slicing like that:
>>> import numpy
>>> a=numpy.array(['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h'])
>>> Idx = [0, 3, 7]
>>> a[Idx]
array(['a', 'd', 'h'],
dtype='|S1')
...and is probably much faster (if pe...
How do I create a copy of an object in PHP?
...ass {
private $someObject;
public function __construct() {
$this->someObject = new SomeClass();
}
public function __clone() {
$this->someObject = clone $this->someObject;
}
}
Now you can do cloning:
$bar = new MyClass();
$foo = clone $bar;
...
Gem::LoadError for mysql2 gem, but it's already in Gemfile
...also with rails 4.1.5) try using this version of mysql2:
gem 'mysql2', '~> 0.3.18'
Apparently mysql2 isn't still compatible with newer version of rails because rails 4.2.4 is pretty new as the time of answering this question by me 8 September 2015 so use the above line in your Gem file and run...
Unresolved Import Issues with PyDev and Eclipse
...need to be restarted for this to work. This only seems to work via "File -> Restart" and not by closing and reopening manually.
– soulBit
May 11 '11 at 14:51
18
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How to write string literals in python without having to escape them?
...
Raw string literals:
>>> r'abc\dev\t'
'abc\\dev\\t'
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How to convert JSON to a Ruby hash
... '{"val":"test","val1":"test1","val2":"test2"}'
puts JSON.parse(value) # => {"val"=>"test","val1"=>"test1","val2"=>"test2"}
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Adding external library in Android studio
...
Try this:
File > Project Structure > Dependencies Tab > Add module dependency (scope = compile)
Where the module dependency is the project library Android folder.
...
How do I remove leading whitespace in Python?
...e leading whitespaces, newline and tab characters on a string beginning:
>>> ' hello world!'.lstrip()
'hello world!'
Edit
As balpha pointed out in the comments, in order to remove only spaces from the beginning of the string, lstrip(' ') should be used:
>>> ' hello world...
Find rows with multiple duplicate fields with Active Record, Rails & Postgres
...Version
User.select(:first,:email).group(:first,:email).having("count(*) > 1")
Also, this is a little unrelated but handy. If you want to see how times each combination was found, put .size at the end:
User.select(:first,:email).group(:first,:email).having("count(*) > 1").size
and you'll...