Re: [Pharo-dev] (a = b) ifTrue: []

On 02 Apr 2015, at 17:15, Anne Etien <anne.etien@univ-lille1.fr> wrote:

Hi,

I wanted to write a method that: - if (a = b) checks other conditions that are specified in the ifTrue block and return this (boolean) value - returns false if (a!=b)

So I wrote: myMethod ^ (a=b) ifTrue: [ aBlockCheckingConditions].

However, when (a!=b) the method returns nil (since false ifTrue: [] returns nil). So do you have an idea how I can do to express that or should I mandatorily wrote also an ifFalse:?

I always use #ifTrue:ifFalse: in such situations, just to be explicit. It makes reading the code easier too.

The problem comes certainly because we don’t know that the ifTrueBlock will return a boolean.

There’s been years of debate on this :)

If you have prettier ideas, I am interested in.

Anne

Cheers, Max