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How do you detect Credit card type based on number?
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+50
The credit/debit card number is referred to as a PAN, or Primary Account Number. The first six digits of the PAN are taken from the ...
Convert column classes in data.table
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105
For a single column:
dtnew <- dt[, Quarter:=as.character(Quarter)]
str(dtnew)
Classes ‘da...
Access to Modified Closure (2)
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159
Prior to C# 5, you need to re-declare a variable inside the foreach - otherwise it is shared, a...
iOS 7 TextKit - How to insert images inline with text?
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5 Answers
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Active
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What is the difference between ~> and >= when specifying rubygem in Gemfile?
...sion provided and use that until it reaches a maximum version. So ~>0.8.5 is semantically equivalent to:
gem "cucumber", ">=0.8.5", "<0.9.0"
The easy way to think about it is that you're okay with the last digit incrementing to some arbitrary value, but the ones preceding it in the string...
How do I configure Notepad++ to use spaces instead of tabs?
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582
Go to the Preferences menu command under menu Settings, and select Language Menu/Tab Settings,...
What does the ^ operator do in Java?
...rator in Java
^ in Java is the exclusive-or ("xor") operator.
Let's take 5^6 as example:
(decimal) (binary)
5 = 101
6 = 110
------------------ xor
3 = 011
This the truth table for bitwise (JLS 15.22.1) and logical (JLS 15.22.2) xor:
^ | 0 1 ^ | F T
--+----...