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csv-diff:tldr:ed13c
The "csv-diff" command you provided is used to compare two CSV files and find the differences between them based on a specified key column. Here's a breakdown of the command:
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"csv-diff": This is the name of the command-line tool or script you are using. It performs the CSV file comparison and outputs the differences.
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"${filename1-csv}": This represents the first CSV file you want to compare. The "${}" syntax is often used to refer to variables in various programming languages. So, the actual file name or path should be substituted in place of "${filename1-csv}".
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"${filename2-csv}": This refers to the second CSV file you want to compare against the first one. Similarly, you need to replace "${filename2-csv}" with the actual file name or path.
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"--key=${column_name}": This argument specifies the key column to be used for comparison. The "${column_name}" denotes a particular column in the CSV files that plays a significant role in identifying and matching records during the comparison. Replace "${column_name}" with the name of the column you want to use as the key.
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"--json": This option instructs the command-line tool to output the differences in JSON format. JSON is a popular data interchange format that is readable by machines and humans alike.
In summary, the command takes two CSV files, compares them based on a specified key column, and outputs the differences in JSON format.