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How can I detect if a selector returns null?
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I have exactly the same code in my standard toolkit. This form is equivalent to object.presence in Rails and super useful in the fallthrough construct that @CSharp describes.
– inopinatus
Aug 27 '15 at 23:12
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How to execute a Ruby script in Terminal?
...er1/program/test.rb
Open terminal
cd /home/User1/program
ruby test.rb
format or test.rb
class Test
def initialize
puts "I love India"
end
end
# initialize object
Test.new
output
I love India
share
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Convert Month Number to Month Name Function in SQL
... should work:
SELECT DATENAME(month, DATEADD(month, @mydate-1, CAST('2008-01-01' AS datetime)))
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Convert JSON to Map
... FWTW, while @obe6's answer is technically correct, you can use shorter form too: Map<String,Object> result = mapper.readValue(source, Map.class).
– StaxMan
Nov 28 '18 at 6:40
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Actual examples for HATEOAS (REST-architecture) [closed]
...plication/xml? It would depend on some non-standard ways of passing this information, like documentation meant to be read by humans.
– ygormutti
Oct 14 '15 at 20:34
add a comm...
How to do 3 table JOIN in UPDATE query?
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So does that mean that in 5.5 only implicit joins form is accepted for update?
– userfuser
Dec 28 '15 at 15:06
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How to convert an NSString into an NSNumber
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Use an NSNumberFormatter:
NSNumberFormatter *f = [[NSNumberFormatter alloc] init];
f.numberStyle = NSNumberFormatterDecimalStyle;
NSNumber *myNumber = [f numberFromString:@"42"];
If the string is not a valid number, then myNumber will be n...
Practicing BDD with python [closed]
...ting about the software, and then intersperse that with examples that also form tests. It's been described as "document driven development" as well -- the point is to focus on outward describable functionality, not internal units of work. I think tradition xUnit is horrible at doing that.
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Count the number occurrences of a character in a string
...he letters in a given string, Counter provides them all in a more succinct form. If you want the count for one letter from a lot of different strings, Counter provides no benefit.
– Brenden Brown
Feb 17 '15 at 19:30
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How to revert a “git rm -r .”?
...This rarely works for me, and I'm so glad I work in a Dropbox folder. Poor form, but saves me every time...
– Nuby
Mar 13 '13 at 15:58
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