Changes

N.B - this test uses 'lazy execution' meaning that if the logical condition is already determined by one of the sub-checks, the other sub-checks will not be performed. For example, we might want to check that c:\Program Files\Application exists and that c:\Program Files\Application\App.exe also exists. If a test finds that the directory doesn't exist, there's no way that the result of the logical 'and' can be true so it returns false immediately. In the above example (c:\fileA, c:\fileB), if c:\fileA exists no test is performed for c:\fileB. Likewise, if an 'at least' test requires four of eight tests to pass, the routine returns 'true' as soon as it finds a fourth true check whether or not it has attempted all of them.

[[category:Documentation]]