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Best way to convert strings to symbols in hash
...my_hash.transform_keys(&:to_sym)
Using older Ruby version? Here is a one-liner that will copy the hash into a new one with the keys symbolized:
my_hash = my_hash.inject({}){|memo,(k,v)| memo[k.to_sym] = v; memo}
With Rails you can use:
my_hash.symbolize_keys
my_hash.deep_symbolize_keys
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What is an API key? [closed]
...I actions based on who's performing the request. For companies which make money from selling such services, it's also a way of tracking who's using the thing for billing purposes. Further still, by blocking a key, you can partially prevent abuse in the case of too-high request volumes.
In general, ...
How to convert a Django QuerySet to a list
...er
Update with regard to the comment:
There are various ways to do this. One (which is probably not the best one in terms of memory and time) is to do exactly the same :
answer_ids = set(answer.id for answer in answers)
existing_question_answers = filter(lambda x: x.answer.id not in answers_id, e...
pass string parameter in an onclick function
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Hi @david..I have one doubt...I want to pass multiple argument in that onclick..how it possible? can you make useful for me..?
– VIVEK-MDU
Aug 22 '13 at 13:25
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How to check if an NSDictionary or NSMutableDictionary contains a key?
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Example one in this answer is slow.
– James Van Boxtel
Jun 23 '11 at 17:31
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What size should apple-touch-icon.png be for iPad and iPhone?
...x60 supported, and if so, what dimensions should I use for the iPad and iPhone?
11 Answers
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What does the leading semicolon in JavaScript libraries do?
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It allows you to safely concatenate several JavaScript files into one, to serve it quicker as one HTTP request.
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Draw line in UIView
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Does one not need to call CGContextBeginPath(context); before CGContextMoveToPoint(...);?
– i_am_jorf
Nov 9 '11 at 18:38
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How do you format an unsigned long long int using printf?
...ed to be C90 compliant by design; C99 introduced some things that not everyone liked.
– スーパーファミコン
Oct 11 '09 at 20:57
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Linear Regression and group by in R
...sion in R using the lm() function. My data is an annual time series with one field for year (22 years) and another for state (50 states). I want to fit a regression for each state so that at the end I have a vector of lm responses. I can imagine doing for loop for each state then doing the regress...