[Newbies] Passing multiple parameters.

[Randal L. Schwartz]

>>>>> "Charles" == Charles Gray <tcykgreis at gmail.com> writes:

Charles> Is it possible to pass multiple parameters to a method? Suppose I want
Charles> to have a method that solves for x in the quadratic equation, ax^2 +
Charles> bx +c =0. We know the equation is ((-b + (b*b -4*a*x) sqrt))/(2*a). I
Charles> want to pass a, b, and c to a method that might be called
Charles> quadraticSolution. This is a hypothetical question but its answer will
Charles> help me with something on which I am working.

The method name reflects the number of parameters:

anObject unaryMessage. "unary message takes no parameters"
anObject + anotherObject. "binary message is punctuation, takes one parameter"
anObject takes: aParameter and: anotherParameter "keyword message"

A keyword message takes one parameter following each colon-terminated word.
In this case, the name of the message is "takes:and:".

For a solver, you'd probably have:

result := theSolver solveQuadraticEquationForA: a andB: b andC: c.

or something like that.

-- 
Randal L. Schwartz - Stonehenge Consulting Services, Inc. - +1 503 777 0095
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