> When you go backward what has already happened won't change. Awesome. So it is the answer to my dream of going backwards to see what caused some state change.
Could this be used in a real app? It seems the expansion of code would slow things down too much to observe a real app's behavior. Also the memory usage of all the data-structures would be excessive in long running apps. Maybe there could be a trimmed down version that only keeps a finite amount of history so the app could run forever? I'm not knocking it. It is useful in a zillion instances I can think of, not just teaching. On Tue, Nov 27, 2012 at 2:17 PM, Cryptic Swarm <[email protected]>wrote: > 1) Can someone tell me what a sha (sp?) dictionary is? > > Sha -> Hash. In the video those were Sha1 hashes. > Dictionary -> JavaScript Object > > Example: > { '3b9e33965edbaf4094947aca1b8d59eacfd2ef47': { usefulInfo:123 }, > '98cbccef9dd0f6f70a48baf03fdfb98fb0f70b4f': { moreInfo: 456 } } > > > 2) It seems this would mainly be useful as a teaching tool because I don't >> see how it could work with non-deterministic behavior such as io events. > > > Yes, mainly useful for teaching/learning purposes, but not really because > of io events. Once something happens it, it happened. The data-structures > are immutable. When you go backward what has already happened won't > change. However, when you go forward again you will potentially fork the > computation tree (if going forward has a different side effect than > previously). > > Example: > var x = Math.random() > > -- > Job Board: http://jobs.nodejs.org/ > Posting guidelines: > https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines > You received this message because you are subscribed to the Google > Groups "nodejs" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/nodejs?hl=en?hl=en > -- Job Board: http://jobs.nodejs.org/ Posting guidelines: https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines You received this message because you are subscribed to the Google Groups "nodejs" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nodejs?hl=en?hl=en
