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How to add new item to hash
...(item2: 2) performs slower compared to hash[:item2] = 2 when there is only one argument
– Rahul Dess
Oct 5 '18 at 22:00
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How can I monitor the thread count of a process on linux?
... This is the sauce for me. I don't want to limit it only to one process. It's easy to add a -p to this if necessary, or anything else. This is the minimum you need to see the thread list.
– Erick Robertson
Apr 6 '16 at 14:45
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Map Tiling Algorithm
...low the edge tiles marked with an X are all green tiles with a tan tile as one or more of their eight neighbouring tiles. With different types of terrain this condition could translate to a tile being an edge tile if it has neighbours of lower terrain-number.
Once all edge tiles are detected the ...
How to use Comparator in Java to sort
...ss as a plural of something, it suggests it is an abstraction of more than one thing.
Anyway, here's a demo of how to use a Comparator<T>:
public class ComparatorDemo {
public static void main(String[] args) {
List<Person> people = Arrays.asList(
new Pers...
Design Patterns: Abstract Factory vs Factory Method
...d to be changed only the Simple Factory Class)
Factory Method
Contains one method to produce one type of product related to its type. (It is better than a Simple Factory because the type is deferred to a sub-class.)
Abstract Factory
Produces a Family of Types that are related. It is noticeab...
Batch file: Find if substring is in string (not in a file)
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@Gary, since that wasn't one of the requirements of this question, you probably should have asked a different question, perhaps linking back to this one as a reference. There's no shortage of people willing to help out. In fact, you still shoud ask t...
Adding a new value to an existing ENUM Type
...blem few days ago and found this post. So my answer can be helpful for someone who is looking for solution :)
If you have only one or two columns which use the enum type you want to change, you can try this. Also you can change the order of values in the new type.
-- 1. rename the enum type you w...
Create a pointer to two-dimensional array
I need a pointer to a static 2-dimensional array. How is this done?
10 Answers
10
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How to compare two colors for similarity/difference
...esign a program that can help me assess between 5 pre-defined colors which one is more similar to a variable color, and with what percentage. The thing is that I don't know how to do that manually step by step. So it is even more difficult to think of a program.
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When and why are database joins expensive?
...d water.
Chris Date, who in company with Dr Ted Codd was the original proponent of the relational data model, ran out of patience with misinformed arguments against normalisation and systematically demolished them using scientific method: he got large databases and tested these assertions.
I thin...