land()

land()

land(<list>[, <delimiter>])
lor(<list>[, <delimiter>])
lxor(<list>[, <delimiter>])
lnor(<list>[, <delimiter>])
lxnor(<list>[, <delimiter>])

These combine a whole list of true and false values at once. Each item counts as the whole number it starts with, so 1.9 is 1, 0.9 is 0 and an item that does not start with a number is 0; a number other than 0 is true.

• land() returns 1 if every number is true, and 0 otherwise.
• lor() returns 1 if any number is true, and 0 otherwise.
• lxor(), lnor() and lxnor() work along the list from the left. The first number is the result so far; each number after it is combined with that result to give 1 or 0. lxor() gives 1 when exactly one of the two is true, lnor() gives 1 when neither is, and lxnor() gives 1 when both or neither are.

Because they work along the list, lxor(), lnor() and lxnor() return a list of one number as it is: lxor(5) is 5. The items are separated by <delimiter>, or by spaces if it is not given or is empty. An empty list gives 0.

land(), lor(), lxor(), lnor() and lxnor() come from RhostMUSH and take the same arguments.

• land examples: each function on a short list

::: seealso

• AND()
• OR()
• XOR()
• NOR()
• LMATH()
• ladd() :::

Examples

> think land(1 1 0)
0
> think lor(0 0 2)
1
> think lxor(0 1 0 1 0 1)
1
> think lnor(0 0)
1
> think lxnor(1 0 1)
0