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How do I extract a sub-hash from a hash?
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If you specifically want the method to return the extracted elements but h1 to remain the same:
h1 = {:a => :A, :b => :B, :c => :C, :d => :D}
h2 = h1.select {|key, value| [:b, :d, :e, :f].include?(key) } # => {:b=>:B, :d=...
How is an overloaded method chosen when a parameter is the literal null value?
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@JonSkeet: That makes sense. So basically it looks for a method according to the most specific rule and if it not able to decide which is more specific then it would throw a compile-time error.
– zakSyed
Oct 23 '12 at 15:03...
How to pass an object into a state using UI-router?
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Actually for passing objects this is quite a nice hack :)
– Tek
Nov 1 '14 at 19:25
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Sourcemaps off by one line in Chrome, with Ruby on Rails, Webpack, and React JS
... also on your webpack config try using different sourcemaps on devtool try all of these to see if one works for inline source map:
inline-source-map
cheap-inline-source-map
for other different configs:
cheap-source-map
cheap-module-source-map
cheap-module-eval-source-map
on webpack config:
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ASP.NET MVC Relative Paths
...ten have to use relative paths. For example, when I reference JQuery, I usually do so like this:
11 Answers
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Is there a foreach in MATLAB? If so, how does it behave if the underlying data changes?
... the data structure, you should use an appropriate Iterator instance which allows the addition and removal of elements in the collection you are iterating. The good news is that MATLAB supports Java objects, so you can do something like this:
A = java.util.ArrayList();
A.add(1);
A.add(2);
A.add(3);...
How to prevent page scrolling when scrolling a DIV element?
...s native scrolling altogether (when cursor is inside the DIV) and then manually scrolling the DIV with JavaScript (by setting its .scrollTop property). An alternative and IMO better approach would be to only selectively disable the browser's scrolling in order to prevent the page scroll, but not the...
Parse RSS with jQuery
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WARNING
The Google Feed API is officially deprecated and doesn't work anymore!
No need for a whole plugin. This will return your RSS as a JSON object to a callback function:
function parseRSS(url, callback) {
$.ajax({
url: document.location.protocol +...
How to debug in Django, the good way? [closed]
... later Django . The first times it was hard looking at tracebacks and actually figure out what I did wrong and where the syntax error was. Some time has passed now and some way along the way, I guess I got a routine in debugging my Django code. As this was done early in my coding experience, I sat ...
Passing arrays as url parameter
...5D=4&aParam%5Ba%5D=b&aParam%5Bc%5D=d"
http_build_query() handles all the necessary escaping for you (%5B => [ and %5D => ]), so this string is equal to aParam[0]=1&aParam[1]=4&aParam[a]=b&aParam[c]=d.
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