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how to return index of a sorted list? [duplicate]
...rt a list of objects based on a property of the objects. i then need to re-order a corresponding list to match the order of the newly sorted list."
That's a long-winded way of doing it. You can achieve that with a single sort by zipping both lists together then sort using the object property as y...
Iterate over a Javascript associative array in sorted order
...nary-like object should I use if I want to iterate over the keys in sorted order?" then you might develop an object like this:
var a = {
keys : new Array(),
hash : new Object(),
set : function(key, value) {
if (typeof(this.hash[key]) == "undefined") { this.keys.push(key); }
this.hash[...
Choosing between std::map and std::unordered_map [duplicate]
Now that std has a real hash map in unordered_map , why (or when) would I still want to use the good old map over unordered_map on systems where it actually exists? Are there any obvious situations that I cannot immediately see?
...
Nodejs Event Loop
...imilar problem like you when I tried to understand node.js architecture in order to write native modules.
What I am posting here is my understanding of node.js and this might be a bit off track as well.
Libev is the event loop which actually runs internally in node.js to perform simple event loop...
Why is SELECT * considered harmful?
...code saves more time and effort in the long run.
If code depends on column order, SELECT * will hide an error waiting to happen if a table had its column order changed.
Even if you need every column at the time the query is written, that might not be the case in the future
the usage complicates pro...
How can I read a large text file line by line using Java?
...les.lines(Paths.get(filename), Charset.defaultCharset())) {
lines.forEachOrdered(line -> process(line));
}
Printing all the lines in the file:
try (Stream<String> lines = Files.lines(file, Charset.defaultCharset())) {
lines.forEachOrdered(System.out::println);
}
...
Do I need to explicitly call the base virtual destructor?
...
No, destructors are called automatically in the reverse order of construction. (Base classes last). Do not call base class destructors.
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Iterating through a list in reverse order in java
...
Of course, you may also want to refactor your code such that the list is ordered correctly so you don't have to reverse it, which uses extra space/time.
EDIT:
Option 2: Alternatively, could you use a Deque instead of an ArrayList? It will allow you to iterate forwards and backwards
EDIT:
...
How to know if two arrays have the same values
...n compare their joined strings to see if they have the same members in any order-
var array1= [10, 6, 19, 16, 14, 15, 2, 9, 5, 3, 4, 13, 8, 7, 1, 12, 18, 11, 20, 17];
var array2= [12, 18, 20, 11, 19, 14, 6, 7, 8, 16, 9, 3, 1, 13, 5, 4, 15, 10, 2, 17];
if(array1.sort().join(',')=== array2.sort().jo...
Select row with most recent date per user
...e t2
WHERE t2.user = t1.user
ORDER BY t2.id DESC
LIMIT 1)
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