![Forrest logo](/images/logo.png)
mlr:tldr:2f08d
This command is using the mlr
(Miller) tool to transform a CSV file into a JSON format. Let's break down the command step by step:
-
mlr
: This is the command to invoke the Miller tool. -
--icsv
: This flag specifies that the input file is in CSV format. -
--ojson
: This flag instructs the Miller tool to generate JSON output. -
put
: This is a Miller verb that allows you to create or modify fields based on defined expressions. -
$${newField1} = $${oldFieldA}/$${oldFieldB}
: This is the expression that defines the computation for the new field,newField1
. It calculates the division ofoldFieldA
byoldFieldB
and assigns the result tonewField1
. The double curly braces ($${}
) are used to indicate that the field names are variables. -
${example-csv}
: This is the input file name or path, in this case,example-csv
.
To summarize, the command takes a CSV file, calculates the division of two fields (oldFieldA
divided by oldFieldB
), assigns the result to a new field called newField1
, and outputs the resulting JSON representation of the modified file.