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How to find index of list item in Swift?
...! // 2
find(arr, "d") // nil
Update for Swift 2.0:
The old find function is not supported any more with Swift 2.0!
With Swift 2.0, Array gains the ability to find the index of an element using a function defined in an extension of CollectionType (which Array implements...
How to check if a user is logged in (how to properly use user.is_authenticated)?
...cated is now an attribute in Django 1.10.
The method was removed in Django 2.0.
For Django 1.9 and older:
is_authenticated is a function. You should call it like
if request.user.is_authenticated():
# do something if the user is authenticated
As Peter Rowell pointed out, what may be tripping you...
Integrating the ZXing library directly into my Android application
...) 2008 ZXing authors
// *
// * Licensed under the Apache License, Version 2.0 (the "License");
// * you may not use this file except in compliance with the License.
// * You may obtain a copy of the License at
// *
// * http://www.apache.org/licenses/LICENSE-2.0
// *
// * Unless required by appli...
NuGet Package Manager errors when trying to update
...
Update: The recently released NuGet 2.0 also may require uninstalling an older version of NuGet first.
From the NuGet 2.0 Release Notes: (http://docs.nuget.org/docs/release-notes/nuget-2.0)
Known Installation Issue
If you are running VS 2010 SP1, you might r...
Switch statement for greater-than/less-than
... 1.2 1.8 3.3 3.8 2.6 1.0
switch-immediate 2.0 1.1 2.0 1.0 2.8 1.3
switch-range 38.1 10.6 2.6 7.3 20.9 10.4
switch-range2 31.9 8.3 2.0 4.5 9.5 6.9
switch-indirect-array 35.2 9.6 4.2 ...
“Parameter” vs “Argument” [duplicate]
...at f)
{
// Do things
}
void Bar()
{
int anInt = 1;
Foo(anInt, 2.0);
}
Here i and f are the parameters, and anInt and 2.0 are the arguments.
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Difference between parameter and argument [duplicate]
...le x)
{
...
return x;
}
void other(void)
{
double two = sqrt(2.0);
}
Under my thesis, x is the parameter to sqrt() and 2.0 is the argument.
The terms are often used at least somewhat interchangeably.
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...
Complex numbers usage in python [closed]
...er has some built-in accessors:
>>> z = 2+3j
>>> z.real
2.0
>>> z.imag
3.0
>>> z.conjugate()
(2-3j)
Several built-in functions support complex numbers:
>>> abs(3 + 4j)
5.0
>>> pow(3 + 4j, 2)
(-7+24j)
The standard module cmath has more funct...
Duilib非常强大的C++界面库 - C/C++ - 清泛网 - 专注C/C++及内核技术
...作的界面库也纷纷开源或免费，当时Alberl还想等着他们出2.0时再用呢，结果眼一睁一闭，别说2.0了，能勉强活下来的就剩duilib了。duilib的历史简介就这样了。
更多教程请参考：http://www.cnblogs.com/Alberl/p/3354459.html
Duilib 界面库
PHP开源导航网站（114la）安装体验 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...的截图：
这里不得不吐槽一下，明明是官网下载的是2.0.1版本，结果里面却是2.0版本（落后了几个月），安装后最终也是2.0版本。
环境检查：如果PDO检测通不过，请查https://www.tsingfun.com/it/tech/1644.html
安装完成后，进...