Relational
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=, ==
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equal to
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The result is 0 (zero) or 1 (one).
Spaces are optional; you can use any number of
spaces around symbol operators.
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!=, <>
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not equal to
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<
|
less than
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<=
|
less than or equal to
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>
|
greater than
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>=
|
greater than or equal to
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Logical
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and, &&
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both operands are true
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The result is 0 (zero) or 1 (one).
Two-word operators must have exactly one space
between the two words. You can use any number of spaces elsewhere. Unlike
in C, both operands are always fully evaluated.
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and not, &&!
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first is true, and second is false
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or, ||
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either is true, or both are true
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or not, ||!
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first is true, or second is false
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xor, ^
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one operand is true, the other is false
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xor not, ^!
|
both are true, or both are false
|
Bitwise
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&
|
1 where both operands have 1
0 everywhere else
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These are numeric string operators.
The first six are like the logical operators.
The last two are bitwise shifts with the second
operand the count.
For example:
(($$myvar >>
8) & 0xFF)
extracts the second-up byte from a number.
|
&~
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1 where first has 1 and second has 0
0 everywhere else
|
|
|
1 where either has or both have 1
0 where both operands have 0
|
|~
|
1 where first has 1 or second has 0
0 where first has 0 and second has 1
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^
|
1 where operand bits differ
0 where operand bits are the same
|
^~
|
1 where operand bits are the same
0 where operand bits differ
|
<< N
|
shift first operand to the left N bits
|
>> N
|
shift first operand to the right N bits
|
Arithmetic
|
+
|
plus
|
These are the usual suspects.
The result of (n /
0) or (n % 0) is 0 (zero), because infinity is hard to represent.
|
-
|
minus
|
*
|
times
|
/
|
divided by
|
%
|
modulo
|
String
|
is
|
equal to
|
is and is
not are caseless compares using stricmp()
plus
is like strcat()
before
and after use strstr() to find the 2nd operand in the 1st:
(doggie before
gi) is dog
You can get a strnicmp()
effect using “first N” or “last
N”
with “is” or “is not”:
(($$myvar first 3)
is
($$yourvar last 3))
|
is not
|
not equal to
|
plus
|
concatenated with
|
before
|
substring before the 1st (leftmost) occurrence
of 2nd string in 1st
|
after
|
substring after the first (leftmost) occurrence
of 2nd string in 1st
|
first N
|
leftmost N
characters (default = 1)
|
last N
|
rightmost N
characters (default = 1)
|
length
|
length in characters
|
Integer result
|
starts $$str
|
true if $$str
is at the start
|
Boolean result
|
ends $$str
|
true if $$str
is at the end
|
Boolean result
|
contains $$str
|
true if $$str
occurs anywhere in the string
|
Boolean result
|
char N
|
Nth character,
counting from left
|
First (leftmost) character is number 1
Default value of N
is 1
|
trim first N
|
all but first N
characters
|
Default value of N
is 1
|
trim last N
|
all but last N
characters
|
Default value of N
is 1
|
$$str lower
|
converts $$str
to lowercase
|
|
$$str upper
|
converts $$str
to uppercase
|
|
$$str replace $$str1
with $$str2
|
converts each instance of $$str1
in $$str to $$str2
|
|
Conditional
|
?
|
“if” the 1st operand is true,
“then” the 2nd operand is the value
of the expression
|
<$($$myvar ? "yes"
:
"no")>
is equivalent to:
<$_if ($$myvar)>
yes
<$_else> no
<$_endif>
|
:
|
“else” the 3rd operand is the value
of the expression
|
