Function Names
compare select, compare pickDescription
These two functions carry out a sequence of comparisons with comparison expressions provided and then return the corresponding value in the following parameter.
Call as: procedure or function
Restrictions
Indirect parameter passing is disabled.
Parameter count
4, 6, 8, etc.
Parameters
| No. | Type | Description |
|---|---|---|
| 1 input |
valid types | Value to compare The value provided in the 1st function parameter will be compared with the comparison expresssions in the following odd-numbered parameters. |
| 2 input |
boolean | Default Value Applicable to compare select: This is the default value to be returned if all comparisons specified in the following function parameters turned out false. |
| Alt. 2 code |
expression :string |
Default Expression Applicable to compare pick: This is the default expression to be calculated if all comparisons in the following function parameters turned out false. |
| 3, 5, ... code |
comparison expression :string |
Values to compare with The value provided in the 1st function parameter will be compared with the comparison expressions provided in these odd-numbered
function parameters. Once a positive match (comparison returns true) has been found, then comparison will stop and the value from the next
function aparameter will be returned.
This parameter is a piece of code typically found on the right-hand side of a comparison with '=' or '<>'. Single values,
ranges (e.g. 3..5), multiple values separated by commas are supported. For text comparison, wildcards are supported if the
string is of type softquoted string.
|
| 4, 6, ... input |
boolean | Value to select Applicable to compare select: This value will be returned if a match with the previous parameter applies. |
| Alt. 4, 6, ... code |
expression :string |
Expression to select Applicable to compare pick: This expression will be calculated and the value returned if a match with the previous parameter applies. Otherwise, the expression will not be calculated. |
Return value
| Type | Description |
|---|---|
| all types | Selected value |
Examples
echo( "Demonstrate 'compare pick': 'Greater than 5' is only printed out when the value is needed");
for (i[] = 1, i[] <= 10, i[]++)
{
a[] = compare select( i[], Others, (2,5,7), "Is 2 or 3", >5, print("Greater than 5 ") );
echo( i[], ": ", a[] );
}
echo( new line, "Demonstrate 'compare pick': 'Greater than 5' is only printed out when the value is needed");
for (i[] = 1, i[] <= 10, i[]++)
{
a[] = compare pick ( i[], Others, (2,5,7), "Is 2 or 3", >5, print("Greater than 5 ") );
echo( i[], ": ", a[] );
}Output
Demonstrate 'compare pick': 'Greater than 5' is only printed out when the value is needed
Greater than 5 1: Others
Greater than 5 2: Is 2 or 3
Greater than 5 3: Others
Greater than 5 4: Others
Greater than 5 5: Is 2 or 3
Greater than 5 6: Greater than 5
Greater than 5 7: Is 2 or 3
Greater than 5 8: Greater than 5
Greater than 5 9: Greater than 5
Greater than 5 10: Greater than 5
Demonstrate 'compare pick': 'Greater than 5' is only printed out when the value is needed
1: Others
2: Is 2 or 3
3: Others
4: Others
5: Is 2 or 3
Greater than 5 6: Greater than 5
7: Is 2 or 3
Greater than 5 8: Greater than 5
Greater than 5 9: Greater than 5
Greater than 5 10: Greater than 5