Add Eliuds Eggs exercise

[homersimpsons]

• Should I add instruction about binary operators ? => yes (Add Eliuds Eggs exercise #639 (comment))

[tomasnorre]

LGTM, with few adjustments.

[tomasnorre]

• Should I add instruction about binary operators ?

I personally think that would be helpful, I would appreciate information on that, to easier solve the exercise.

[homersimpsons]

• Should I add instruction about binary operators ?

I personally think that would be helpful, I would appreciate information on that, to easier solve the exercise.

I did add some instructions in: https://github.com/exercism/php/pull/639/files#diff-1b8add07daeefcbb201624c607300ed14d8a926741b6a6d9562b7faa1c9b291f

Do you think this is enough?

I think the current should be enough for someone providing a working solution such as:

$displayValue = 89;
$eggCount = (($displayValue & 0b00000001) > 0)
          + (($displayValue & 0b00000010) > 0)
          + (($displayValue & 0b00000100) > 0)
          + (($displayValue & 0b00001000) > 0)
          + (($displayValue & 0b00010000) > 0)
          + (($displayValue & 0b00100000) > 0)
          + (($displayValue & 0b01000000) > 0)
          + (($displayValue & 0b10000000) > 0);
// => 4

[mk-mxp]

Nice recursive solution to the problem. Add the UUIDs if you want to, but we can merge it as is.

[mk-mxp]

• Should I add instruction about binary operators ?

I did add some instructions in: https://github.com/exercism/php/pull/639/files#diff-1b8add07daeefcbb201624c607300ed14d8a926741b6a6d9562b7faa1c9b291f

Do you think this is enough?

I think that is fine. One does not need much knowledge about binary operators, the PHP manual page will be enough.