string concatenation when assigning to variable

[cgmoore]

Hi,

I think I read somewhere that

strVar = "one" & "andtwo" & "andthree"

is the equivalent of

strVar = "oneandtwoandthree"

and not the same as

strVar = "one"
strVar += "andtwo"
strVar += "andthree"

is this correct?

Thanks,
Gerald

 

[cgmoore]

Thanks, guys!

G

Correct.

The compiler optimises out string /literal/ concatenation.

However, for something like ...

s1 = "one"
s2 = "two"
s3 = "three"

s4 = s1 & s2 & s3

... you're back to square one, with all the action happening at run-time.

HTH,
Phill W.

 

[Herfried K. Wagner [MVP]]

[String concatenation]

In addition to the other replies: You can use tools like "ILDASM.EXE" or
Lutz Roeder's Reflector for taking a closer look at the IL emitted by the
compiler.