Robert Cummings wrote:
> Nathan Rixham wrote:
>> Robert Cummings wrote:
>>> Nathan Rixham wrote:
>>>> Robert Cummings wrote:
>>>>> Nathan Rixham wrote:
>>>>>> Robert Cummings wrote:
>>>>>>> steve_r wrote:
>>>>>>>> I'm new to programming
>>>>>>>>
>>>>>>>> function check_it2($val) {
>>>>>>>> echo gettype($val);
>>>>>>>> switch($val) {
>>>>>>>> case($val > 0 ):
>>>>>>>> echo "Switch greater than 0";
>>>>>>>>
>>>>>>> You're a tad confused :)
>>>>>>>
>>>>>>> Q: What is the result of $val > 0?
>>>>>>> A: false.
>>>>>>>
>>>>>>> Q: What is the value of $val?
>>>>>>> A: -1
>>>>>>>
>>>>>>> Q: Is -1 equivalent to false?
>>>>>>> A: Yes!
>>>>>>>
>>>>>>> Use an if statement for this kind of logic.
>>>>>> This is a fantastic example of false logic and an easy pitfall.
>>>>>>
>>>>>> in fact this would make a great interview question!
>>>>>>
>>>>>> to expand a little on the various scenarios (just for clarity, Rob is
>>>>>> wrong)
>>>>>>
>>>>>> $val = 1;
>>>>>> 1 > 0 equates to TRUE
>>>>>> is 1 equivalent to TRUE : YES
>>>>>>
>>>>>> $val = 0;
>>>>>> 0 > 0 equates to FALSE
>>>>>> is 0 equivalent to FALSE : YES
>>>>>>
>>>>>> $val = -1;
>>>>>> -1 > 0 equates to FALSE
>>>>>> is -1 equivalent to FALSE: NO
>>>>>>
>>>>> Fail on that last one. -1 is equivalent to FALSE :B
>>>>>
>>>> well that's one job you're not getting :p
>>> Well I DID get 66.7%. I've met "coders" that would stare at the answer
>>> and still not understand :D
>>
>> the travesty is that you didn't spend most of yesterday on trains brushing
>> up on / studying formal logic!
>
> Muphry's Law!!!
>
> http://en.wikipedia.org/wiki/Muphry's_law
>
> *heheh*
in situations like this one might consider changing the conversation
previous!
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