Topcon OPUS A6G2 - Page 526

526
OPUS Projektor Manual
JavaScript
Opera
tor
Example
Result
Comment
===
===
42 === 42
42 === "42"
true
false
strong compare
<
42 < 43
"w" < "W"
true
false
less than
<=
42 <= 42
42 <= 43
true
true
less or equal
>
42 > 43
false
greater than
>=
42 >= 43
false
greater or equal
=
i = 42
Value 42 is assigned to
variable i
+=
i += 1
43
i = i + 1;
-=
i -= 1
42
i = i - 1;
*=
i *= 2
84
i = i * 2;
/=
i /= 2
42
i = i / 2;
%=
i %= 2
0
i = i % 2;
i = 2; j = 5;
&&
(i <= 2) &&
(j < 7)
true
both statements need to be
true (AND)
||
(i%2 == 0) ||
(j%2 == 0)
true
only one statement need to
be true (OR)
!
(i ==2) && !
(j%2 == 0)
true
negation of a statement
(NOT)
i = 2; j = 7;
&
i & j
2
Check if bit is set. In binary:
0010 & 0111 = 0010
|
i | j
7
Set a bit. In binary: 0010 |
0111 = 0111
^
i ^ j
5
Toggle a bit. In binary: 0010
& 0111 = 0101
<<
2 << 1
4
Shift bits to the left. In binary:
0010 << 1 = 0100
>>
2 >> 1
1
Shift bits to the right. In
binary: 0010 >> 1 = 0001
>>>
i = 10;
i >>> 2
2
Shift right and fill with zeros.
In binary: 1010 >>> 2 = 0010
Loops
Loops can be used in JavaScript similar to many other programming languages.
WARNING: A loop stops execution of the main application until it is finished. So make sure
that only very short loops are used.
WARNING: Loops should and can NOT be used to "wait" within a JavaScript program. You
can NOT "spend time" within one JavaScript. If you need to time something, use the repeated