To convert or parse CSV data into anarray, you need to use JavaScript’sFileReaderclass, which contains a method calledreadAsText()that will read a CSV file data and parse the result as astringtext. TheFileReaderclass is a web API, so this solution only works in the browser. If you ne...
Create a User-Defined Function to Load CSV to an Array in JavaScript We will use theFileReaderclass to read the required CSV file as a string. To store this into an array, we will use theslice(),split(), andmap()functions. Theslice()function helps return a new array with a portion ...
const fs = require('fs/promises'); const readFile = fs.readFile; readFile("lipsum.txt", { ...
Initialize an output array:Create an array for storing the parsed CSV data. Attach the event handlers:Create the following event handlers: readInterface.on("line", ...):It is called for each line in the CSV file. It splits each line using a comma as the delimiter and adds it as an ...
readFileSync('username.csv') const array = csv.toString().split('\n'); /* Store the converted result into an array */ const csvToJsonResult = []; /* Store the CSV column headers into seprate variable */ const headers = array[0].split(', ') /* Iterate over the remaning data ...
对于使用 , 作为分隔符和引号字符串值的 CSV 文件,您可以使用此版本: // Split data into lines and separate headers from actual data // using Array spread operator const [headerLine, ...lines] = data.split('\n'); // Use common line separator, which parses each line as the contents of ...
示例： 从 CSV 或 Excel 文件读取数据并执行查询。// 从CSV文件读取数据alasql('CREATE FILE FROM ?',['./data.csv']);var csvData =alasql('SELECT * FROM data.csv');// 从Excel文件读取数据alasql('CREATE FILE FROM ?',['./data.xlsx']);var excelData =alasql('SELECT * FROM data.xlsx');...
Papa Parse - A powerful CSV library that supports parsing CSV files/strings and also exporting to CSV. jBinary - High-level I/O (loading, parsing, manipulating, serializing, saving) for binary files with declarative syntax for describing file types and data structures. diff2html - Git diff ...
In this example, the split() method separates the CSV string into individual data elements. Converting JSON string to array in JavaScript When dealing with JSON data, you can parse a JSON string into an array: const jsonString = '["John Doe",30,"Male","Software Engineer"]'; const column...
README Unlicense license Convert array of objects into a CSV file Converts an array of JavaScript objects into the CSV format. You can save the CSV to file or return it as a string. The keys in the first object of the array will be used as column names. Any special characters in the...