Assignment Operators

Assignment Operators

[%
    a = b                     # regular assignment
    a => b                    # fat comma quotes LHS: ('a', b)

    foo( a = 10, b = 20 )     # foo({ a => 10, b => 20 })

    foo( a => 10, b => 20 )   # foo( a => 10, b => 20 )
                              # foo('a', 10, 'b', 20)

    foo({ a => 10, b => 20 }) # foo({ a => 10, b => 20 })

%]--EOF--
look inside...

Thus Spake Andy:

The assignment operator is the same as in TT2 and does exactly what you expect. In TT2 the => fat comma was an alias for =. In TT3 it works just like Perl in simply quoting the bareword on the left. When calling a function/method with named parameters, TT3 will continue to do it's magical thing when you use = (magical being collecting up all named params and passing them as a single hash reference). However, if your function/method isn't expecting that then you can use => just as you would in Perl. You can also explicitly use { ... } to create a hash reference if you prefer. So the general rule is that if you do it the same way you would in Perl (using =>) then it does the same thing that Perl does. If you use = then you get TT magic.