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How do I parse JSON with Ruby on Rails? [duplicate]
...similarity of the [] method.
Here are some examples:
hash_of_values = {'foo' => 1, 'bar' => 2}
array_of_values = [hash_of_values]
JSON[hash_of_values]
# => "{\"foo\":1,\"bar\":2}"
JSON[array_of_values]
# => "[{\"foo\":1,\"bar\":2}]"
string_to_parse = array_of_values.to_json
JSON[...
How does collections.defaultdict work?
...ment can be any callable object - not just type functions. For example if foo was a function that returned "bar", foo could be used as an argument to default dict and if a non-present key was accessed, its value would be set to "bar".
– lf215
Jul 29 '13 at 5:5...
How to smooth a curve in the right way?
Lets assume we have a dataset which might be given approximately by
9 Answers
9
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How to emulate C array initialization “int arr[] = { e1, e2, e3, … }” behaviour with std::array?
...ove construction when make_array sets up the initializer. So std::array<Foo,2> x{Foo(1), Foo(2)}; has no copy/move, but auto x = make_array(Foo(1), Foo(2)); has two copy/moves as the arguments are forwarded to make_array. I don't think you can improve on that, because you can't pass a variadic...
difference between #if defined(WIN32) and #ifdef(WIN32)
...
#ifdef FOO
and
#if defined(FOO)
are the same,
but to do several things at once, you can use defined, like
#if defined(FOO) || defined(BAR)
share
...
Most concise way to convert a Set to a List
For example, I am currently doing this:
6 Answers
6
...
combinations between two lists?
...
The simplest way is to use itertools.product:
a = ["foo", "melon"]
b = [True, False]
c = list(itertools.product(a, b))
>> [("foo", True), ("foo", False), ("melon", True), ("melon", False)]
share...
How to make a python, command-line program autocomplete arbitrary things NOT interpreter
...n and you'll be fine
import cmd
addresses = [
'here@blubb.com',
'foo@bar.com',
'whatever@wherever.org',
]
class MyCmd(cmd.Cmd):
def do_send(self, line):
pass
def complete_send(self, text, line, start_index, end_index):
if text:
return [
...
Find and restore a deleted file in a Git repository
...ted>
Now it's time to run the automated test. The shell command '[ -e foo.bar ]' will return 0 if foo.bar exists, and 1 otherwise. The "run" command of git-bisect will use binary search to automatically find the first commit where the test fails. It starts halfway through the range given (from ...
git --git-dir not working as expected
...
Little clarification: git --git-dir="$HOME/foo/.git" --work-tree="$HOME/foo" status
– Haris Krajina
Feb 17 '14 at 11:36
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