Basic string manipulation in batch like
you are used to from other programming languages.
Font: http://www.dostips.com/DtTipsStringManipulation.php
Align text to the right i.e. to improve readability
of number columns.
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Extract characters from the beginning of a string.
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Use Key-Value pair list to lookup and translate
values.
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Extract a Substring by Position.
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Remove a substring using string substitution.
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Remove the first and the last character of a string.
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Remove all spaces in a string via substitution.
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Replace a substring using string substitution.
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Extract characters from the end of a string.
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Split a String, Extract Substrings by Delimiters.
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Add one string to another string.
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Trim spaces from the beginning of a string via
"FOR" command.
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Remove surrounding quotes via FOR command.
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Trim spaces from the end of a string via
"FOR" command.
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Trim spaces from the end of a string via
substitution.
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Align Right - Align text
to the right i.e. to improve readability of number columns
Description:
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Add leading spaces to a string to make sure the
output lines up. I.e. for variables no longer than 8 characters add 8 spaces
at the front and then show only the last 8 characters of the variable.
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Script
Output:
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Left String - Extract characters from the beginning of
a string
Description:
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Similar to the Left function in VB
a batch script can return a specified number of characters from the left side
of a string by specifying a substring for an expansion given a position of 0
and a length using :~ while expanding a variable content. The example shows
how to return the first 4 characters of a string.
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Script:
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Script
Output:
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Map and Lookup - Use Key-Value pair list to lookup and
translate values
Description:
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This example shows an approach to map a name of a
month into it`s corresponding two digit number. The key-value pairs are
listed in the map variable separated by semicolon. Key and value itself are
separated by one dash character. Same can be used to tranlate a
day-of-the-week short string into a day-of-the-week long string by changing
the map content only.
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Script Output:
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Mid String - Extract a Substring by
Position
Description:
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Similar to the Mid function in VB a
batch script can return a specified number of characters from any position
inside a string by specifying a substring for an expansion given a position
and length using :~ while expanding a variable content. The example here
shows how to extract the parts of a date.
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Script:
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Script Output:
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Remove - Remove a substring using string
substitution
Description:
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The string substitution feature can also be used to
remove a substring from another string. The example shown here removes all
occurrences of "the " from the string variable str.
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Script:
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Script Output:
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Remove both Ends - Remove the first and
the last character of a string
Description:
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Using :~1,-1 within a variable
expansion will remove the first and last character of the string.
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Script:
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Script Output:
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Remove Spaces - Remove all spaces in a
string via substitution
Description:
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This script snippet can be used to remove all spaces
from a string.
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Script:
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Script Output:
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Replace - Replace a substring using string
substitution
Description:
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To replace a substring with another string use the
string substitution feature. The example shown here replaces all occurrences
"teh" misspellings with "the" in the string variable str.
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Script:
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Script Output:
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Right String - Extract characters from the
end of a string
Description:
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Similar to the Right function in VB
a batch script can return a specified number of characters from the right
side of a string by specifying a substring for an expansion given a negative
position using :~ while expanding a variable content. The example shows how
to return the last 4 characters of a string.
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Script:
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Script Output:
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Split String - Split a String, Extract
Substrings by Delimiters
Description:
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Use the FOR command to split a
string into parts. The example shows how to split a date variable into its
parts.
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Script:
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Script Output:
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String Concatenation -
Add one string to another string
Description:
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This example shows how to add two strings in DOS.
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Script:
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Script Output:
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Trim Left - Trim spaces
from the beginning of a string via "FOR" command
Description:
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Use the FOR command to trim spaces
at the beginning of a variable. In this example the variable to be trimmed is str.
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Script:
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Script Output:
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Trim Quotes - Remove
surrounding quotes via FOR command
Description:
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The FOR command can be used to
safely remove quotes surrounding a string. If the string does not have quotes
then it will remain unchanged.
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Script:
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Script Output:
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Trim Right - Trim spaces from the end of a
string via "FOR" command
Description:
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Trimming
spaces at the end of a variable seems a little tricky. The following example
shows how to use a FOR loop to trim up to 31 spaces
from the end of a string. It assumes that Delayed Expansion is enabled.
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Script:
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Script Output:
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Trim Right - Trim spaces
from the end of a string via substitution
Description:
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Trimming spaces at the end of a variable seems a
little tricky. The following example shows how to use the string substitution
feature to trim up to 31 spaces from the end of a string. It
assumes that the string to be trimmed never contains two hash "##"
characters in a row.
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Script:
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Script Output:
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