Tagged Questions
2
votes
0answers
34 views
functional javascript - recursively walking a tree to build up a new one; could this be better factored as a reduce?
/**
* recursively build a nested Backbone.Model or Backbone.Collection
* from a deep JSON structure.
*
* undefined for regex values
*/
exports.modelify = function modelify (data) {
if ...
1
vote
2answers
37 views
functional javascript - how could I generalize this code that correlates parallel async requests with their results?
/**
* takes a list of componentIDs to load, relative to componentRoot
* returns a promise to the map of (ComponentID -> componentCfg)
*/
function asyncLoadComponents (componentRoot, components) ...
3
votes
1answer
92 views
The eternal dilemma: bar.foo() or foo(bar)?
I was using foo(bar) as it's adopted for functional programming.
console.log(
join(
map(function(row){ return row.join(" "); },
tablify(
...
1
vote
0answers
25 views
Is this code for getting the dependency tree of a file correct?
function dep_tree(graph,node,prev_deps){
return uniq(flatten(graph[node].map(function(child_node){
if (contains(prev_deps,child_node))
throw "Circular reference between ...
3
votes
1answer
111 views
Functional Sundaram's sieve
I wrote this Sundaram's sieve in Coffeescript to quickly generate prime numbers up to limit:
sieve_sundaram = (limit) ->
numbers = (n for n in [3...limit+1] by 2)
half = limit / 2
...
6
votes
3answers
186 views
Overusing JavaScript closures?
I've finally gotten around to learning Lisp/functional programming. However, what I've noticed is that I'm trying to bring ideas back into JavaScript.
Example
Before
var myPlacemark,
...
1
vote
1answer
125 views
Solution to 99 lisp problems: P08 with functional javascript
Solution to 99 lisp problems: P08, with functional javascript
If a list contains repeated elements they should be replaced with a single copy of the element. The order of the elements should not ...
5
votes
1answer
318 views
Optimizing and consolidating a big jQuery function
I understand this is a very vague question and a lot of code to look over. My question is basically: I have all these functions that work together to create functionality on a page: is the structure ...
5
votes
1answer
212 views
Project Euler question 2 in CoffeeScript
By considering the terms in the Fibonacci sequence whose values do not exceed four million, find the sum of the even-valued terms.
fib = (x) ->
return 0 if x == 0
return 1 if x == 1
...
3
votes
3answers
121 views
Functional way to write this code
I have a pan control that look like this:
Pretty standard Google Mapsish controls, IMO.
When the user clicks in the top 3rd of the control, it should pan up (deltaY = +1); right third means it ...
0
votes
1answer
130 views
Javascript: Replacing a for loop that iterates over an array with the functional programming equivalent
Player.prototype.d2 = function(ratingList, rdList) {
var tempSum = 0;
for (var i = 0; i < ratingList.length; i++) {
var tempE = this.e(ratingList[i], rdList[i]);
tempSum += ...
