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Why can I initialize a List like an array in C#?
... has a method named Add(...)
What happens is the default constructor is called, and then Add(...) is called for each member of the initializer.
Thus, these two blocks are roughly identical:
List<int> a = new List<int> { 1, 2, 3 };
And
List<int> temp = new List<int>();
...
Remove duplicate rows in MySQL
...
A really easy way to do this is to add a UNIQUE index on the 3 columns. When you write the ALTER statement, include the IGNORE keyword. Like so:
ALTER IGNORE TABLE jobs
ADD UNIQUE INDEX idx_name (site_id, title, company);
Th...
Node.js: Difference between req.query[] and req.params
...rentPage) {
/**
* Construct two different queries
* - Fetch all patients
* - Adjusted one to only fetch a selected slice of patients for a given page
*/
patientQuery
/**
* This means I will not retrieve all patients I find, but I will skip the first "n"...
Is there a good jQuery Drag-and-drop file upload plugin? [closed]
Is there a nice tidy jQuery plugin that allows including a single JS script then using a simple snippet to enable a form? Something like this:
...
ArrayIndexOutOfBoundsException when using the ArrayList's iterator
...oing that right, as far as iterating through the Arraylist goes?
No: by calling iterator twice in each iteration, you're getting new iterators all the time.
The easiest way to write this loop is using the for-each construct:
for (String s : arrayList)
if (s.equals(value))
// ...
As...
win7 安装项目管理工具redmine2.5.1 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...要开始这项工作。
一、了解redmine
参考redmine官方的Installtion Guide，主要是对redmine有个大致的了解。
http://www.redmine.org/projects/redmine/wiki/RedmineInstall
二、下载必要的软件包
我用的是以下的版本：
redmine-2.5.1.zip
railsinstaller-2....
What is a lambda (function)?
...us and refers to anonymous functions in programming.
Why is this cool? It allows you to write quick throw away functions without naming them. It also provides a nice way to write closures. With that power you can do things like this.
Python
def adder(x):
return lambda y: x + y
add5 = adder(5)...
How To Check If A Key in **kwargs Exists?
...efix variable. If it is given, then its value is being used.
This is generally a compact and readable recipe for writing wrappers for any kind of function: Always just pass-through arguments you don't understand, and don't even know if they exist. If you always pass through *args and **kwargs you m...
jQuery animate backgroundColor
...best compression in this case needing only 2317 bytes and since it is so small - here it is:
(function (d) {
d.each(["backgroundColor", "borderBottomColor", "borderLeftColor", "borderRightColor", "borderTopColor", "color", "outlineColor"], function (f, e) {
d.fx.step[e] = function (g) {...
Naming returned columns in Pandas aggregate function? [duplicate]
...er, this does not work with lambda functions, since they are anonymous and all return <lambda>, which causes a name collision:
>>> df.groupby('A').agg({'B': [lambda x: x.min(), lambda x: x.max]})
SpecificationError: Function names must be unique, found multiple named <lambda>
...