Expressions Cheat Sheet 
Contents |
[edit] Unary operators
- — Negation operator, returns the negation of the following numeric value. This only works on numeric values.
! — Logical negation operator
[edit] Examples
var boolean truevalue = true;
var boolean falsevalue = !truevalue;
[edit] Multiplicative operators
* — Multiplication, returns the result of multiplying the two sides.
/ — Division, returns the result of dividing the first side by the second.
% — Modulus, returns the remainder from doing integer division
[edit] Examples
var int32 bar = 24;
var int32 result;
result = foo * bar; // answer is 1008
result = foo / bar; // answer is 1
result = foo % bar; // answer is 18
[edit] Additive operators
+ — Addition (or concatenation, if either operand is a string)
- — Subtraction
[edit] Examples
var int32 bar = 24;
var string three = '3';
var int32 result;
result = foo + bar; // answer is 66
result = foo – bar; // answer is 18
result = three + foo; // answer is '342'
result = bar + three; // answer is '243'
result = three + three; // answer is '33'
[edit] Relational and Equality operators
< — Less Than
<= — Less Than Or Equal
> — Greater Than
>= — Greater Than Or Equal
== — Equal To
!= — Not Equal To
isa — Tests to determine if a field or variable is a particular type. Note that the type name must be a string enclosed in quotes.
[edit] Examples
var int32 bar = 24;
var Biz baz = new Biz;
var boolean result;
result = foo < bar;
result = foo <= bar;
result = foo > bar;
result = foo >= bar;
result = foo == bar;
result = foo != bar;
result = baz isa "Biz"; // result is true
result = bas isa "NonBiz"; // result is false
result = foo isa "integer"; // result is always false because "integer" (int) is not a complex type</p>
[edit] Using isa with Primitives
When performing isa tests with primitives, you must use sometimes use alternate names according to the following chart
| primitive | name to use in isa expressions |
|---|---|
| Data | |
| boolean | |
| char | |
| date | |
| datetime | |
| decimal | |
| double | |
| float | |
| int | integer |
| int16 | |
| int32 | |
| int64 | |
| long | |
| string | string |
| uchar | |
| uint | |
| uint16 | |
| uint32 | |
| uint64 | |
| ulong |
[edit] Conditional operators
? : — Ternary Conditional, operates like the ternary operator in c/c++
CAVEAT Currently, the inline "if" operator (condition?branch_if_true:branch_if_false) has higher precedence than the concatenation operator. For example, if you have an inline if set to an expression containing true?"true"+"=1":"false"+"=0", then it will evaluate to "true=1=0". The work around is to use parenthesis, for example: true ? ("true" + "=1") : ("false" + "=0")
[edit] Examples
var int32 second = 24;
var int32 result;
result = (first > second) ? first : second; // result is set to first
[edit] Logical Operators
&& — Logical AND
|| — Logical OR (||)
[edit] Examples
var boolean foo = true;
var boolean bar = false;
var boolean result;
result = foo && bar; // result is false
result = foo || bar; // result is true
[edit] Bitwise Operators
& — Bitwise AND
| — Bitwise OR
[edit] Examples
var int result;
var int test = 42;
result = test & 32; // [HEX: 0x2A & 0x20 = 0x20] [BINARY: 101010 & 100000 = 100000]
result = test | 21; // [HEX: 0x2A | 0x15 = 0x3F] [BINARY: 101010 & 010101 = 111111]
[edit] Constant Operators
null — The constant for a null object reference, similar to a NULL pointer in c/c++.
true — The constant for the boolean true value.
false — The constant for the boolean false value.
today — Returns the current date & time.
now — Returns the current date & time.
none — Indicates that a dateTime (type) is not set.
nonedate — Indicates that a date (type) is not set.
luid — Returns a locally unique identifier.
guid — Returns a globally unique identifier.
[edit] Examples
var boolean result;
var dateTime rightNow;
var date present;
var string identifier;
foo = null;
result = true;
result = false;
rightNow = today;
rightNow = now;
rightNow = none;
present = today;
present = now;
present = nonedate;
identifier = luid;
identifier = guid;
[edit] Special Characters
You can encode special characters using a backslash and letter combination.
\t — Tab
\n — Line break
\n\r — Carriage return
This special characters list is incomplete. If you need a code for a special character, you can get help in the Q & A Knowledgebase.
