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领域驱动设计系列（五）:事件驱动之异步事件 - 更多技术 - 清泛网 - 专注C/...
...，只有在真的需要的时候再用。
作者: 王德水
出处：http://deshui.wang
领域驱动设计 DDD 事件驱动 异步事件
Proper way to return JSON using node or Express
...portant that you set the Content-Type header to application/json, too.
var http = require('http');
var app = http.createServer(function(req,res){
res.setHeader('Content-Type', 'application/json');
res.end(JSON.stringify({ a: 1 }));
});
app.listen(3000);
// > {"a":1}
Prettified:
var htt...
Why does C++ require a user-provided default constructor to default-construct a const object?
...Working Group (CWG) Defect 253. The new wording for the standard states in http://eel.is/c++draft/dcl.init#7
A class type T is const-default-constructible if
default-initialization of T would invoke a user-provided constructor
of T (not inherited from a base class) or if
each direct ...
What are the differences between django-tastypie and djangorestframework? [closed]
... a view that exposes a model, you can do Django-style inequality filters:
http://www.example.com/api/person?age__gt=30
or OR queries:
http://www.example.com/api/mymodel?language__in=en&language__in=fr
these are possible with djangorestframework, but you have to write custom filters for eac...
How to open a new tab using Selenium WebDriver?
...selenium-webdriver'
driver = Selenium::WebDriver.for :firefox
driver.get('http://stackoverflow.com/')
body = driver.find_element(:tag_name => 'body')
body.send_keys(:control, 't')
driver.quit
Python
from selenium import webdriver
from selenium.webdriver.common.keys import Keys
driver = web...
How do I use Assert to verify that an exception has been thrown?
...d message text.", ex.Message );
Assert.AreEqual( 5, ex.SomeNumber);
See: http://nunit.org/docs/2.5/exceptionAsserts.html
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Listing all permutations of a string/integer
.....z) -->
a + perm(...), b + perm(....)
....
I found the pseudocode on http://www.programmersheaven.com/mb/Algorithms/369713/369713/permutation-algorithm-help/:
makePermutations(permutation) {
if (length permutation < required length) {
for (i = min digit to max digit) {
if (i not...
how to draw smooth curve through N points using javascript HTML5 canvas?
... to go through all the sample points, but it is much more complicated (see http://www.cartogrammar.com/blog/actionscript-curves-update/)
Here is the the drawing code for the approximation method:
// move to the first point
ctx.moveTo(points[0].x, points[0].y);
for (i = 1; i < points.len...
How to get a complete list of ticker symbols from Yahoo Finance? [closed]
...te (and daily updated) list of all Yahoo ticker symbols available through http://finance.yahoo.com
9 Answers
...
Current time formatting with Javascript
...plemented
* %% - not implemented (use "%")
*
* strftime() reference:
* http://man7.org/linux/man-pages/man3/strftime.3.html
*
* Day of year (%j) code based on Joe Orost's answer:
* http://stackoverflow.com/questions/8619879/javascript-calculate-the-day-of-the-year-1-366
*
* Week number (%V)...