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Does Java SE 8 have Pairs or Tuples?
...the elements:
(a, b)
(first, second)
(left, right)
(car, cdr)
(foo, bar)
etc.
One big issue that has hardly been mentioned is the relationship of Pairs to primitives. If you have an (int x, int y) datum that represents a point in 2D space, representing this as Pair<Integer, Integer> consum...
What is the X-REQUEST-ID http header?
...e corresponding log statements (without having to rely on timestamps, IPs, etc).
As this ID is generated (randomly) by the client it does not contain any sensitive information, and should thus not violate the user's privacy. As a unique ID is created per request it does also not help with tracking ...
Default value of a type at Runtime [duplicate]
...s and new myType() for value types (which corresponds to 0 for int, float, etc) So you really only need to account for two cases:
object GetDefaultValue(Type t)
{
if (t.IsValueType)
return Activator.CreateInstance(t);
return null;
}
(Because value types always have a default cons...
Non-CRUD operations in a RESTful service
... So:
POST /api/purchase
will place a new order. The details (user, car, etc.) should be referenced by id (or URI) inside the contents sent to this address.
It doesn't matter that ordering a car is not just a simple INSERT in the database. Actually, REST is not about exposing your database tables...
Best way to compare two complex objects
...!= another.GetType()) return false;
//properties: int, double, DateTime, etc, not class
if (!obj.GetType().IsClass) return obj.Equals(another);
var result = true;
foreach (var property in obj.GetType().GetProperties())
{
var objValue = property.GetValue(obj);
var anotherValue = proper...
What are the differences between .gitignore and .gitkeep?
...fficient to express it's purpose (examples: templates/cache, upload/thumbs etc). In these cases putting a readme into each of these feels redundant.
– Halil Özgür
Jan 31 '13 at 8:33
...
TCP: can two different sockets share a port?
...d not only by source/destination port/IP, but also by a protocol (TCP, UDP etc.), if I am not mistaken.
– Ondrej Peterka
Apr 27 '14 at 15:00
2
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How to set custom location for local installation of npm package?
...File: $HOME/.npmrc or userconfig param
Global Config File: $PREFIX/etc/npmrc or userconfig param
Built-In Config File: path/to/npm/itself/npmrc
Default Config: node_modules/npmconf/config-defs.js
By default, locally-installed packages go into ./node_modules. global ones go into the ...
What is the difference between Amazon SNS and Amazon SQS?
...ceives to different storage systems (s3, hard disk on your host, database, etc.).
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Most efficient way to create a zero filled JavaScript array?
...nsole.dir( Array(5) ). Notice that it doesn't have any properties 0, 1, 2, etc. But when you apply that unto the Array constructor, it's like saying Array(undefined, undefined, undefined, undefined, undefined). And you get an object that kinda looks like { length: 5, 0: undefined, 1: undefined...}. ...