Hello, I have a rule: rule “Update time on modbus devices” when Time cron “0 0/1 * * * ?” then var Calendar cal = Calendar.getInstance() logInfo(“===”, “===”) var int second = cal.get(Calendar.SECOND) var int dayOfWeek = cal.get(Calendar.DAY_OF_WEEK) - 1 if (dayOfWeek == 0) dayOfWeek = 7 …

if I change this string with transformation, everithing is works fine, but why I can’t use it in rules???

Rules DSL does not implement bit wise operators like shift. In Xtend << is the doubleLessThan operator which means “much less than”, not a bit shift left. It would appear that Rules DSL doesn’t support bit shift operations at all.

[image] rlkoshak: doubleLessThan operator which means “much less than” That is quite subjective… I have never heard of that. How does that work?

I honestly have no idea. I put it on my list to look into at some later date when I have more time. All I have so far is: Xtend docs e1 << e2 e1.operator_doubleLessThan(e2) And wikipedia: The double less-than sign ( << ) is used for an approximation of the much-less-than sign (≪) I didn’t g…

Hello, If you see my code: reg40035.sendCommand((month << 8) + dayOfMonth) reg40034.sendCommand((hourOfDay << 8) + minute) reg40033.sendCommand((second << 8) + dayOfWeek) that one works without any issues. So, my question is why is working one those lines, but if I try to use Math function it s…

Are you sure it works in the other statements? If it errors on the line var int year = (Math.floor(cal.get(Calendar.YEAR) / 100) << 8) + (cal.get(Calendar.YEAR) % 100) the rule exits immediately and the other statements are never reached.

Yes. 100% sure. because line with year I add last.

Then the problem could be that the value isn’t cast to int until after the entire expression is evaluated. The <<-operator might work on primitive ints, but not on whatever the Calendar-functions or Math.floor returns. Try splitting it up in different steps, something like: var int century = Math.f…

I already use biginteger. floor return 20.0 not 20, maybe it’s a problem. but when i use transformation, in transformation this code works. thats confused

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Rule and << 8... something I do not understand

Setup, Configuration and Use Scripts & Rules

vzorglub (Vincent Regaud) October 16, 2019, 7:39pm 3

Please use code fences when posting code…

<< is a bitwise operator
<< 8 is equivalent to * 256 have you tried that?