Code Explainers

Code explainers tagged #guard-clause

typescript 
export function formatDuration(ms: number): string {
  if (!Number.isFinite(ms) || ms < 0) {
    return "00:00";
  }

Formatting milliseconds as a clock string

formatting integer-math guard-clause
Beginner 4 steps
ruby 
class DigestMailer < ApplicationMailer
  default from: "notifications@example.com"
 
  def weekly_digest(user)

Building a weekly digest email in Rails

mailers active-record query-scopes
Intermediate 6 steps