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What is the difference between string primitives and String objects in JavaScript?
...JavaScript has two main type categories, primivites and objects.
var s = 'test';
var ss = new String('test');
The single quote/double quote patterns are identical in terms of functionality. That aside, the behaviour you are trying to name is called auto-boxing. So what actually happens is that a ...
Python: How do I make a subclass from a superclass?
... the direction specified by the reverse keyword argument, as the following tests illustrate:
import pytest
def test_1():
assert SortedList([5, 2, 3]) == [2, 3, 5]
def test_2():
SortedList([5, 2, 3], reverse=True) == [5, 3, 2]
def test_3():
with pytest.raises(TypeError):
sorte...
How do I preview emails in Rails?
...previewing emails in Rails 4.1. For example, check this out:
# located in test/mailers/previews/notifier_mailer_preview.rb
class NotifierPreview < ActionMailer::Preview
# Accessible from http://localhost:3000/rails/mailers/notifier/welcome
def welcome
Notifier.welcome(User.first)
end
...
Detecting a mobile browser
...(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows ce|xda|xiino/i.test(a)||/1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|...
Check if one list contains element from the other
...
If you just need to test basic equality, this can be done with the basic JDK without modifying the input lists in the one line
!Collections.disjoint(list1, list2);
If you need to test a specific property, that's harder. I would recommend, by...
Serializing an object as UTF-8 XML in .NET
...ystem.Text;
using System.IO;
using System.Xml.Serialization;
public class Test
{
public int X { get; set; }
static void Main()
{
Test t = new Test();
var serializer = new XmlSerializer(typeof(Test));
string utf8;
using (StringWriter writer = new Utf8...
Skip a submodule during a Maven build
...t;/module>
...
<module>module-integration-test</module>
</modules>
</profile>
</profiles>
...
In your CI, you would run maven with the ci profile, i.e. mvn -P ci clean install
...
Using GCC to produce readable assembly?
...sas="objdump -drwCS -Mintel" in your ~/.bashrc
Example:
> gcc -g -c test.c
> objdump -d -M intel -S test.o
test.o: file format elf32-i386
Disassembly of section .text:
00000000 <main>:
#include <stdio.h>
int main(void)
{
0: 55 push ebp
1:...
How to “grep” for a filename instead of the contents of a file?
...
The easiest way is
find . | grep test
here find will list all the files in the (.) ie current directory, recursively.
And then it is just a simple grep. all the files which name has "test" will appeared.
you can play with grep as per your requirement.
Not...
What's the difference between a proc and a lambda in Ruby?
...of a lambda triggers the code right outside of the lambda code
def lambda_test
lam = lambda { return }
lam.call
puts "Hello world"
end
lambda_test # calling lambda_test prints 'Hello World'
‘return’ inside of a proc triggers the code outside of the method where the proc...