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  Help Page - inline

( Some help pages may not display correctly in html because those help pages may have sample code
in them, part of which may be mis-interpreted as html tags.

All help pages, including this help page, are available in biterScripting with the help command. )




System Feature Inline Command Purpose Executes a command as part of another command. Syntax { <command> } Description An inline command is a command that is embedded within another command. Inline command is enclosed within braces (also called curly brackets) {}. An inline command is executed at run time and its output is substituted in place of the { <command> } on the current command line. The current command is executed then. Although, we use the singular word <command> to describe inline syntax, multiple commands can be enclosed within the {} using either pipes or semicolons. Furthermore, any combination of function calls, expressions, calls to scripts, can be enclosed within the {}. Inline commands can be crucial in redirecting streams. We will explain it by way of an example. Consider the following sample script. # Assume that we have a few .jsp files. We are # inserting Copyright notice in each of them. # Collect a list of .jsp files in a variable. var str fileList lf -rn "*.jsp" "C:/myproject" > $fileList while ($fileList <> "") do # Get the next file from the file list. var str file set $file = { lex "1" $fileList } # Read the content of $file into a variable. var str content repro $file > $content # Insert copyright before the first line. lin -e "1" "Copyright (c) 2008, My Company\n" $content >null # We don't want to see the output of the above lin command, # we want the $content itself to be modified. # Write the modified content back to file. echo $content > $file # <======== LOOK AT THIS REDIRECTION done Look at the line that contains > $file. The intention here is to read files, insert copyright notice, save files, one by one. However, instead of writing to a file whose name is in $file, the output of the echo command is being written to the variable $file. This defeats our purpose. To alleviate this problem, the redirection should be specified as follows > { echo $file } This inline command substitutes the actual file name in place of the inline command. As a result, the output of the echo command will now be correctly written to the file. Inline commands can be used in all input, output and error stream redirections. Restrictions Inline command(s) can not be nested. Valid Examples repro "mypage.aspx" > $content echo "Number of lines in file: " { len $content } The above will show the count of lines in the file mypage.aspx. repro { lf -rn "*.txt" } The above will list contents of all .txt files in the current directory and any subdirectories. Invalid Examples wen { repro { lf -rn "*.txt" } } The intention above is to first list all .txt files, then reproduce their contents, then count the words. This is an example of invalid nesting of inline commands. The intention, however, can be achieved using the following. var str $content repro { lf -rn "*.txt" } > $content wen $content See Also var pipe stream input output error

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