xsv

Attenzione

La sezione per xsv non è ancora pronta. È possibile fare riferimento al sito ufficiale.

È un toolkit dedicato alla lettura, interrogazione, analisi di file CSV. È scritto in Rust ed è sorprendente per rapidità e facilità d'uso.

Mette a disposizione diversi comandi:

• cat - Concatenate CSV files by row or by column.
• count - Count the rows in a CSV file. (Instantaneous with an index.)
• fixlengths - Force a CSV file to have same-length records by either padding or truncating them.
• flatten - A flattened view of CSV records. Useful for viewing one record at a time. e.g., xsv slice -i 5 data.csv | xsv flatten.
• fmt - Reformat CSV data with different delimiters, record terminators or quoting rules. (Supports ASCII delimited data.)
• frequency - Build frequency tables of each column in CSV data. (Uses parallelism to go faster if an index is present.)
• headers - Show the headers of CSV data. Or show the intersection of all headers between many CSV files.
• index - Create an index for a CSV file. This is very quick and provides constant time indexing into the CSV file.
• input - Read CSV data with exotic quoting/escaping rules.
• join - Inner, outer and cross joins. Uses a simple hash index to make it fast.
• partition - Partition CSV data based on a column value.
• sample - Randomly draw rows from CSV data using reservoir sampling (i.e., use memory proportional to the size of the sample).
• reverse - Reverse order of rows in CSV data.
• search - Run a regex over CSV data. Applies the regex to each field individually and shows only matching rows.
• select - Select or re-order columns from CSV data.
• slice - Slice rows from any part of a CSV file. When an index is present, this only has to parse the rows in the slice (instead of all rows leading up to the start of the slice).
• sort - Sort CSV data.
• split - Split one CSV file into many CSV files of N chunks.
• stats - restituisce delle statistiche di base, per ogni campo.
• table - Show aligned output of any CSV data using elastic tabstops.