uf_value_exists_in_array() - check if array has value


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Postby Ursego » 16 Apr 2013, 13:23

The function reports if the value exists in the array. If the array is small (100 elements or less) then the function simply loops on it, otherwise it creates a DataStore and uses Find(). It has 2 overloads - for string and long data types:

String:

Code: Select all
/**********************************************************************************************************************
Dscr:         Reports if the value exists in a STRING array. If the array is small (100 elements or less) then the function
            simply loops on it; otherwise, it creates a DataStore and uses Find().
            Another overload does the same for a LONG array.
***********************************************************************************************************************
Arg:         as_val
            rs_arr[] (ref)
***********************************************************************************************************************
Developer:   Michael Zuskin -  http://linkedin.com/in/zuskin | http://code.intfast.ca/
**********************************************************************************************************************/
long         ll_upper_bound
long         ll_row
DataStore   lds_temp

if uf_empty(as_val) then
   f_throw(PopulateError(0, "Arg as_val is empty.")) // f_throw(): http://code.intfast.ca/viewtopic.php?f=2&t=1
end if

// If array is small then we can LOOP:
ll_upper_bound = UpperBound(rs_arr[])
if ll_upper_bound <= 100 then
   for ll_row = 1 to ll_upper_bound
      if rs_arr[ll_row] = as_val then
         return true
      end if
   next
   return false
end if

// The array is large - it's faster to use DataStore search:
lds_temp = uf_ds_from_array(rs_arr[]) // uf_ds_from_array(): http://code.intfast.ca/viewtopic.php?f=4&t=92
lds_temp.object.val.current = rs_arr[]
ll_row = lds_temp.Find("the_val=" + as_val, 1, ll_upper_bound)
destroy lds_temp

return (ll_row > 0)


Long:

Code: Select all
/**********************************************************************************************************************
Dscr:         Reports if the value exists in a LONG array. If the array is small (100 elements or less) then the function
            simply loops on it; otherwise, it creates a DataStore and uses Find().
            Another overload does the same for a STRING array.
***********************************************************************************************************************
Arg:         al_val
            rl_arr[] (ref)
***********************************************************************************************************************
Developer:   Michael Zuskin -  http://linkedin.com/in/zuskin | http://code.intfast.ca/
**********************************************************************************************************************/
long         ll_upper_bound
long         ll_row
DataStore   lds_temp

if uf_empty(al_val) then
   f_throw(PopulateError(0, "Arg al_val is empty.")) // f_throw(): http://code.intfast.ca/viewtopic.php?f=2&t=1
end if

// If array is small then we can LOOP:
ll_upper_bound = UpperBound(rl_arr[])
if ll_upper_bound <= 100 then
   for ll_row = 1 to ll_upper_bound
      if rl_arr[ll_row] = al_val then
         return true
      end if
   next
   return false
end if

// The array is large - it's faster to use DataStore search:
lds_temp = uf_ds_from_array(rl_arr[]) // uf_ds_from_array(): http://code.intfast.ca/viewtopic.php?f=4&t=92
lds_temp.object.val.current = rl_arr[]
ll_row = lds_temp.Find("the_val=" + al_val, 1, ll_upper_bound)
destroy lds_temp

return (ll_row > 0)
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Ursego
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Joined: 19 Feb 2013, 20:33



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