Stefan Fochler iStefo

"Model-dependent query param stickiness"

The question of whether query param controller properties are preserved/restored/reset when navigating away/back/between routes is a tricky one, but the sensible default seems to be "model-dependent stickiness", whereby query params are stick unless you're switching the model of the current or parent routes. There's more that could be said about this but here's a quick summary of my plan:

We need a dictionary to store QP state scoped to a model

These are my thoughts on using the (bleeding edge) query-params-new from 1.6.0-beta.1+canary.01f3f32c.

1. Numerical Parameters

The currently handled parameter types are strings (of course), arrays (with the arr[]=foo1&arr[]=foo2 syntax, which is not the nicest but closest zu the standard) and booleans. The absence of integer parameters means having to use parseInt() in every method where the parameter is used. (Setting the parameter to a number value is no problem)

I think there are two ways to determine whether to cast or not while parsing parameters:

Check if param contains only digits and just assume that it's meant to be a numeric parameter then. Since this may cause unforeseen behaviour we shouldn't do this
Add a descriptior to the controllers queryParams to force a query parameters data type (this would also allow providing an array when the present url is arr=foo1 without the [], but I'm not sure if this is a desirable thing)

	# Requires Elixir 1.12+
	Mix.install([
	{:benchee, "~> 1.0"}
	])

	# Benchmark copied from https://gist.github.com/denispeplin/99047e34b0974b00116f335651d551d6
	defmodule So.Exclude do
	def exclude1() do
	a = [1, 2, 3, 4]
	b = [3, 4, 5, 6]


	import UIKit

	class ViewController: UIViewController {

	override func viewDidLoad() {
	super.viewDidLoad()

	DispatchQueue.global(qos: .userInteractive).async {
	//Background thread

	import Ember from 'ember';

	export default Ember.Component.extend({
	totalLength: Ember.computed('[email protected]', function() {
	// doesn't matter, won't compute anyway
	return -1;
	})
	});

	import Ember from 'ember';

	export default Ember.Component.extend({
	totalLength: Ember.computed('[email protected]', function() {
	// doesn't matter, won't compute anyway
	return -1;
	})
	});

	defmodule History do
	@type op :: {ta(), cmd(), data()}
	@type ta :: any()
	@type cmd :: :read \| :write \| :commit \| :abort
	@type data :: any()

	@doc """
	Parses a textual representation of a history into a list of operation tuples.

	## Examples

	/*
	escapeExpression inserted into the Spacebars namespace, taken from
	https://github.com/wycats/handlebars.js/blob/master/lib/handlebars/utils.js
	*/

	var escape = {
	"&": "&",
	"<": "<",
	">": ">",
	'"': """,

	// include this code in your application, you don't need to call any initialization manually!

	Ember.Application.initializer({
	name: "meta",

	initialize: function(container, application) {
	// helper function to get tag from dom
	var _getTag = function(tagname, property, value) {
	var tags = document.head.getElementsByTagName(tagname),
	tag,