npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

dedupe-csv

v1.2.9

Published

A deduper for duplicated entries found on a CSV files

Downloads

21

Readme

dedupe-csv npm version package size minified size (gzip) types node

Dedupe-csv

​ A lightweight module designed to be run from the command line. By default, it takes a csv file, removes duplicate lines, and exports the unique lines to a new CSV. Also included, are optional parameters to check for duplicates across a subset of columns and to switch between keeping the first and last duplicates. ​ dedupe-csv is based on pandas' drop_duplicates function and has the same functionality. ​

Quick start

​ To use dedupe-csv open the terminal on the folder where the file is located. ​

Options

​ The dedupe-csv command accepts the following options: ​

  • file: Specifies the input CSV file. Replace "data.csv" with the path to your CSV file.
  • column: (Optional) if omitted it will look for identical rows. If specified, the header name in the CSV file will be used to identify duplicates. Replace "header name/s" with the header/s name you want to use. You can use multiple headers.
  • keep: (Optional) Specifies the strategy for keeping duplicates. The default value is "first".
  • Available options are:
    • "first": Keep the first occurrence of each duplicate.
    • "last": Keep the last occurrence of each duplicate.​

dedupe-csv file="data.csv" column="header name" keep="first"

Install

​ Using npm: ​

$ npm install -g dedupe-csv

​ Using yarn: ​

$ yarn global add dedupe-csv

Usage

Remove duplicate lines

This will remove any entries that are identical across all headers and keep the first entry found

$ dedupe-csv file="data.csv"
data.csv
brand,style,rating
Yum,cup,1
Yum,cup,1

Will output the following file:

data_deduped.csv
brand,style,rating
Yum,cup,1

Remove duplicates by column name

This will remove any entries that have the same duplicated column

$ dedupe-csv file="data.csv" column="brand"
data-column.csv
brand,style,rating
Yum,cup,1
Yum,pack,2
Foo,cup,1
Foo,pack,2

Will output the following file:

data-column_deduped.csv
brand,style,rating
Yum,cup,1
Foo,cup,1

Remove duplicates using multiple headers

This will remove any entries that match the same duplicated columns. To use it, add columns between quotes and separated by commas.

$ dedupe-csv file="data-multiple.csv" column="brand,style"
data-multiple.csv
brand,style,rating
Yum,cup,1
Yum,cup,2
Foo,cup,1
Foo,pack,3
Foo,pack,1

Will output the following file:

data-multiple_dedupe.csv
brand,style,rating
Yum,cup,1
Foo,cup,1
Foo,pack,3

Remove duplicates by header and keep last

This will remove any duplicated entries that match by column name and keep the last found ​ To use add the option keep="last"

$ dedupe-csv file="data.csv" column="brand" keep="last"
data-last.csv
brand,style,rating
Yum,cup,1
Yum,pack,2
Foo,cup,1
Foo,pack,2

Will output the following file:

data-last_deduped.csv
brand,style,rating
Yum,pack,2
Foo,pack,2