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Writing Technician Interface Scripts

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The let command provides the following string functions:

• strlen( )

• strindex( )

• strrindex( )

• strpbrk( )

•strmatch( )

• <single_character>

The arguments for each function can be a literal character string, a set of

characters enclosed in double quotes (“”), or the name of an environment variable.

When you specify an environment variable, do not precede the name with

If a function returns an offset within a string, an index of 1 refers to the first

character position.

The function

strlen( ) returns the number of characters in the parameter

strlen(

)

The function strindex( ) finds the first occurrence of a string in another string. The

function

strrindex( ) finds the last occurrence of a string in another string. Both

functions return the offset within

’s position, or 0 if

substring

> is not found.

strindex(

)

strrindex(

)

The function strpbrk( ) searches

for the first character that matches any

of the characters given in the character string

<set>

. The function returns the

offset to the first matching character’s position in

, or 0 if no character of

<set>

appears in

strpbrk(

)

The function

strmatch(

) compares

. If

matches the pattern, the function returns a 1; otherwise it returns a 0. You

may use wildcards (

* or ?) in

. A * matches any character (or no

character), and a

? matches any character in that position in the string. A character

must exist in that position for

? to match.

strmatch(

)

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