String Operators

Concatenation

The _ (underscore) symbol is used concatenate two strings, or to attach one string to the end of another.

例:

Assume A="JACK" and B="JILL"

===========  =============
Expression   Result
===========  =============
A\_"s DOG"    JACKs DOG
B_A          JILLJACK
A\_" and "_B  JACK and JILL
===========  =============

Equality

The = (equal sign) symbol is used to compare two strings to see if they are equal. This will return a boolean based on the result.

Examples::
Expression Result
2000+11=2011 1
2000=”2000: B” 0
2011=02011 1
2011=”02011” 0
“Hex”=”Tech”+5 5
“ABC”=” ABC”+3 3

Contains

The [ (left square bracket) symbol is used to check if a string contains another string. This will return a boolean based on the result.

Examples::
Expression Result
“RENSSELAER”[“AER” 1
“RENSSELAER”[“NOT” 0

Follows

The ] (right square bracket) symbol is used to determine if a string follows another string in collating sequence. .. _a link: http://en.wikipedia.org/wiki/Collating_sequence

Example::
Expression Result
“COPERNICUS”]”KEPLER” 0
“OBAMA”]”BUSH” 1

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