preview/project/memory-hex/exercises/02_compare-time.Rmd

---
example:
  title: Compare Time
  instructions: Find the number of minutes and seconds between `then` and `now`
  runtime: repl_js
  initial:
    js: |+2
      const then = new Date()
      // or enter a time stamp for a not too distant date & time
      // const then = new Date("2019-12-02 12:24:00")

      setTimeout(() => {
        const now = new Date()
        console.log({then, now, diff: now - then})
      }, 2123)
  solution:
    js: |+2
      const then = new Date()
      // const then = new Date("2019-12-02 12:24:00")

      setTimeout(() => {
        const now = new Date()
        let seconds = Math.floor((now - then) / 1000)
        
        let minutes = 0
        if (seconds >= 60) {
          minutes = Math.floor(seconds / 60)
          seconds = seconds - minutes * 60
        }
        
        minutes = (minutes < 10 ? '0' : '') + minutes
        seconds = (seconds < 10 ? '0' : '') + seconds
        
        console.log({seconds, minutes})
      }, 2123)

    css: ~
output: js4shiny::html_document_plain
---