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How to correctly iterate through getElementsByClassName
...ists do not have a forEach function.
If using this with babel you can add Array.from and it will convert non node lists to a forEach array. Array.from does not work natively in browsers below and including IE 11.
Array.from(document.querySelectorAll('.edit')).forEach(function(button) {
// Now...
Difference between json.js and json2.js
...
I also noticed that json2 stringified arrays differently than json2007.
In json2007:
var array = [];
array[1] = "apple";
array[2] = "orange";
alert(array.toJSONString()); // Output: ["apple", "orange"].
In json2:
var array = [];
array[1] = "apple";
array[2] ...
How to randomize two ArrayLists in the same fashion?
I have two arraylist filelist and imgList which related to each other, e.g. "H1.txt" related to "e1.jpg". How to automatically randomized the list of imgList according to the randomization of fileList ? Like in excel, if we sort certain column, the other column will automatically follow?
...
Different types of thread-safe Sets in Java
...
1) The CopyOnWriteArraySet is a quite simple implementation - it basically has a list of elements in an array, and when changing the list, it copies the array. Iterations and other accesses which are running at this time continue with the old ...
Using GSON to parse a JSON array
...aused by comma at the end of (in your case each) JSON object placed in the array:
{
"number": "...",
"title": ".." , //<- see that comma?
}
If you remove them your data will become
[
{
"number": "3",
"title": "hello_world"
}, {
"number": "2",
...
rails - Devise - Handling - devise_error_messages
...sh.each do |name, msg| %>
# New code (allow for flash elements to be arrays)
<% if msg.class == Array %>
<% msg.each do |message| %>
<%= content_tag :div, message, :id => "flash_#{name}" %>
<% end %>
<% else %>
# old code
<%= conte...
What does “O(1) access time” mean?
...to the number of items in the collection.
Typical examples of these are arrays, which can be accessed directly, regardless of their size, and linked lists, which must be traversed in order from the beginning to access a given item.
The other operation usually discussed is insert. A collection c...
Accessing nested JavaScript objects and arays by string path
...e:
function resolve(path, obj=self, separator='.') {
var properties = Array.isArray(path) ? path : path.split(separator)
return properties.reduce((prev, curr) => prev && prev[curr], obj)
}
Example usage:
// accessing property path on global scope
resolve("document.body.style.w...
Best practices/performance: mixing StringBuilder.append with String.concat
....toString();
concat()
String s = s1.concat(s2);
String creates char[] array that can fit both s1 and s2. Copies s1 and s2 contents to this new array. Actually requires less work then + operator.
StringBuilder.append()
Maintains an internal char[] array that grows when needed. No extra char[] ...
Having issue with multiple controllers of the same name in my project
... I haven't tested it, but the namespaces parameter is a string array, so you should be able to pass any number by adding to the array: new string[] { "MyCompany.MyProject.WebMvc.Controllers", "My.Second.Namespace", "My.Third.Namespace", "Namespaces.Etc" }
– David Ru...