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Why should a Java class implement comparable?
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Here is a real life sample. Note that String also implements Comparable.
class Author implements Comparable<Author>{
String firstName;
String lastName;
@Override
public int compareTo(Author other){
// compareTo should return < 0...
Why doesn't a python dict.update() return the object?
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Also, if the keys in award_dict are not string the interpreter will throw a TypeError
– kunl
Aug 1 '15 at 14:59
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How do I use variables in Oracle SQL Developer?
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If comparing &&value1 to a string value like: &&value1 = 'Some string' then &&value1 needs to be wrapped in single quotes like: '&&value1' = 'Some string'
– Ryan E
Mar 5 '14 at 21:29
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bash: Bad Substitution
...ed and the script will be interpreted by dash, which does not support that string substitution syntax.
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How to override to_json in Rails?
...oked to create the data structure, and then that hash is encoded as a JSON string using ActiveSupport::json.encode. This happens for all types: object, numeric, date, string, etc (see the ActiveSupport code).
ActiveRecord objects behave the same way. There is a default as_json implementation that c...
Updating Bootstrap to version 3 - what do I have to do?
...-3-Typeahead, see also: https://stackoverflow.com/questions/18615964/ajax-call-in-bootstrap-3-0-typeahead/18620473
Switch to the latest version of jQuery 1.x (don't use the 2.x version cause jQuery 2.x don't support IE8)
If you use third party widgets which adds or insert html to your code (like add...
Why there is no ConcurrentHashSet against ConcurrentHashMap
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Set<String> mySet = Collections.newSetFromMap(new ConcurrentHashMap<String, Boolean>());
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ANTLR: Is there a simple example?
...org.antlr.runtime.*;
public class ANTLRDemo {
public static void main(String[] args) throws Exception {
ANTLRStringStream in = new ANTLRStringStream("12*(5-6)");
ExpLexer lexer = new ExpLexer(in);
CommonTokenStream tokens = new CommonTokenStream(lexer);
ExpParser...
What is the difference between MySQL, MySQLi and PDO? [closed]
...ocedural style and the OO one with mysqli.
– Patrick Allaert
Jun 19 '10 at 9:31
@Patrick, thanks. I've corrected this...
Factors in R: more than an annoyance?
... of why they're a pain is because in read.table and read.csv, the argument stringsAsFactors = TRUE by default (and most users miss this subtlety). I say they are useful because model fitting packages like lme4 use factors and ordered factors to differentially fit models and determine the type of con...