once(bool Condition): int
Helper function; returns nonzero when Condition became true the first time
in a session or simulation cycle, otherwise 0.
Parameters:
Condition - any boolean expression.
Returns:
Nonzero when Condition just became true, otherwise
0.
Example:
if(once(!is(LOOKBACK))) printf("\nEnd of lookback reached!");
See also:
if,
ifelse
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