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Test if string is a number in Ruby on Rails
...method:
def is_number? string
true if Float(string) rescue false
end
And then call it like this:
my_string = '12.34'
is_number?( my_string )
# => true
Extend String Class.
If you want to be able to call is_number? directly on the string instead of passing it as a param to your helper f...
Java equivalent of unsigned long long?
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Nope, there is not. You'll have to use the primitive long data type and deal with signedness issues, or use a class such as BigInteger.
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Android: open activity without save into the stack
I have 2 activities: Main and List.
10 Answers
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Exclude a sub-directory using find
... @Ravi are you using bash shell? I just tested this on my terminal and it works for me. Try copy and pasting the solution instead if you made modifications to your script.
– sampson-chen
Nov 19 '12 at 19:30
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SQL Server Output Clause into a scalar variable
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You need a table variable and it can be this simple.
declare @ID table (ID int)
insert into MyTable2(ID)
output inserted.ID into @ID
values (1)
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Add to Array jQuery
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+1 for explaining both JavaScript and jQuery's method and their fundamental difference. I came here for $.add() and got just a little bit more.
– Sam
Feb 1 '14 at 0:21
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How to see if an object is an array without using reflection?
How can I see in Java if an Object is an array without using reflection?
And how can I iterate through all items without using reflection?
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How to make a cross-module variable?
The __debug__ variable is handy in part because it affects every module. If I want to create another variable that works the same way, how would I do it?
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“Add unimplemented methods” feature in the Android Studio
...uired methods of the particular class. I'm looking for this feature in the Android Studio IDE, but without success so far. Is there something similar? For me it is one of the key-features and can't live without.
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Version of SQLite used in Android?
What is the version of SQLite used in Android?
5 Answers
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