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1 Example of authored "range check" | 189 comments | Create New Account
Comments belong to whoever posts them. Please notify us of inappropriate comments.
1 Example of authored "range check"
Authored by: jjs on Sunday, August 05 2012 @ 08:56 AM EDT
Actually it's more (pseudocode):

//Check if a slice of an array is inside the array and that
//the lower element is below the higher element so when we
//do a count up it will stop correctly

rangecheck (array a, element low element high)
//check if the low element is lower than the high element
if location low > location high
return error
//check if the lower element is outside the array by
checking if it is lower than the low element
if location low < location array(0)
return error
//finally check that the high element is under the maximum
//element of the array by seeing if it is above the maximum
//location
if location high > location array(max)
return error
//If no errors, return to work
return

---
(Note IANAL, I don't play one on TV, etc, consult a practicing attorney, etc,
etc)

[ Reply to This | Parent | # ]

Except your example is buggy
Authored by: Wol on Sunday, August 05 2012 @ 10:46 AM EDT
And quite badly so at that :-)

Let's pass to your function the following values:

Low = 6
High = 3
Value = 4

And you'll return TRUE.

Now let's pass

Low = High = Value = 3

And you'll return FALSE.

Writing code is harder than you think :-)

Cheers,
Wol

[ Reply to This | Parent | # ]

1 Example of authored "range check"-superfluous code
Authored by: Anonymous on Monday, August 06 2012 @ 07:55 AM EDT
First off, I don't mean to offend. Just eman to point out you may be more right
than you already thought.
I am working from the presumption that low would be inclusive and high exclusive
and that there only needs to be a result true/false, rather than the different
types of exceptions in the actual rangecheck funtion.
Here's the code (c-style):

return (low < high and value >= low and value < high);

There is no need for an if-statement, as the comparison between brackets already
evaluates to true or false. And see, this could be done with only one line of
code, in stead of nine.

[ Reply to This | Parent | # ]

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