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: 0
>>>>>
>>>>> Q: Is 0 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
>>>> right)
>>>>
>>>> $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: YES
>>>>
>>>> so no matter what value you set $val to; it's always true.
>>> Fail on that last one. -1 is not equivalent to FALSE :B
>>>
>>
>> well that's one job I'm not getting :p
>
> Well you DID get 66.7%. I've met "coders" that would stare at the answer
> and still not understand :D
the travesty is that I spent most of yesterday on trains brushing up on
/ studying formal logic!
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