mathjs/src/utils/log.js

Math.js is an extensive math library for JavaScript and Node.js. It features a flexible expression parser with support for symbolic computation, comes with a large set of built-in functions and constants, and offers an integrated solution to work with dif

/**
 * Log a console.warn message only once
 */
export const warnOnce = (() => {
  const messages = {}

  return function warnOnce (...args) {
    const message = args.join(', ')

    if (!messages[message]) {
      messages[message] = true

      console.warn('Warning:', ...args)
    }
  }
})()