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What is the difference between string primitives and String objects in JavaScript?
...ame is called auto-boxing. So what actually happens is that a primitive is converted to its wrapper type when a method of the wrapper type is invoked. Put simple:
var s = 'test';
Is a primitive data type. It has no methods, it is nothing more than a pointer to a raw data memory reference, which e...
AES Encryption for an NSString on the iPhone
... Encrypt to NSData, and use one of the many Base64 encoders to convert that to a string. There is no way to encrypt from a string to a string without a data-to-string encoder.
– Rob Napier
Oct 7 '12 at 17:40
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How to convert timestamps to dates in Bash?
I need a shell command or script that converts a Unix timestamp to a date. The input can come either from the first parameter or from stdin, allowing for the following usage patterns:
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Convert a row of a data frame to vector
... you extract a single row from a data frame you get a one-row data frame. Convert it to a numeric vector:
as.numeric(df[1,])
As @Roland suggests, unlist(df[1,]) will convert the one-row data frame to a numeric vector without dropping the names. Therefore unname(unlist(df[1,])) is another, sl...
Why cast unused return values to void?
...tandard(2003) says in §5.2.9/4 says,
Any expression can be explicitly converted to type “cv void.” The expression value is discarded.
So you can write :
//suppressing unused variable warnings
static_cast<void>(unusedVar);
static_cast<const void>(unusedVar);
static_cast<vol...
Convert String array to ArrayList [duplicate]
I want to convert String array to ArrayList . For example String array is like:
5 Answers
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Add default value of datetime field in SQL Server to a timestamp
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This fails with the error message "Unable to convert between [B and TIMESTAMP]". It seems CURRENT_TIMESTAMP is a binary value, not a datetime.
– Sindri Traustason
Oct 18 '13 at 12:37
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Dealing with float precision in Javascript [duplicate]
...ant to group them by rounding them down to the nearest multiple of x and convert the result to a string.
5 Answers
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What is the simplest way to convert a Java string from all caps (words separated by underscores) to
...e pretty much says it all. What's the simplest/most elegant way that I can convert, in Java, a string from the format "THIS_IS_AN_EXAMPLE_STRING" to the format " ThisIsAnExampleString "? I figure there must be at least one way to do it using String.replaceAll() and a regex.
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How to convert a negative number to positive?
How can I convert a negative number to positive in Python? (And keep a positive one.)
6 Answers
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