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Date & TimeIntermediate

Days of Your Life

Robomotion•Updated 6 months ago
Days of Your Life

Overview

Calculates how many days you have been alive by subtracting your birthday from today. Uses DateTime Now, Subtract, and a Function node to produce a clean day count.

Days of Your Life

Handling datetime values can be challenging, as time-related data require absolute accuracy. Robomotion allows you to perform reliable calculations with datetime values and display results in various units.

What Days of Your Life can do

  • Message Dialog (Core.Dialog.MessageBox, optType: info) titled Description explains the flow to the user.
  • Input Dialog (Core.Dialog.InputBox) titled Please select your birthday..., prompt Select your birth date (YYYY-MM-DD):, default 1990-01-01 → msg.birth_date_text.
  • Parse birth date (Robomotion.DateTime.Format, custom in-layout 2006-01-02, out-layout RFC3339) → msg.birth_date.
  • Get current date (Robomotion.DateTime.Now, RFC3339, Local) → msg.current_date.
  • Days since birth (Robomotion.DateTime.Span, RFC3339) from msg.birth_date to msg.current_date → msg.span_ms.
  • Milliseconds to days (Core.Programming.Function) — Math.floor(msg.span_ms / 86400000) → msg.days_alive.
  • Build dialog text (Core.Programming.Function) — composes Today is day #<days_alive> into msg.dialog_text.
  • Message Dialog (Core.Dialog.MessageBox, optType: info) titled Attention! shows msg.dialog_text, then Core.Flow.Stop.

Behind the scenes

  • The flow has no explicit cancel branch — if the user cancels the input dialog, downstream nodes simply fail fast.
  • Day counting is done by dividing the millisecond span (Robomotion.DateTime.Span returns ms) by 86400000 and flooring — this matches a whole-days-elapsed semantic and avoids DST / timezone drift.
  • The birth-date string is normalised through Robomotion.DateTime.Format (custom 2006-01-02 layout to RFC3339) so Span gets a well-formed timestamp regardless of how the user typed it.