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打字机效果 · App Inventor 2 中文网
...）
添加一个标签、一个按钮
标签用于一个个显示文字，点击按钮开始测试。
添加一个计时器
计时器用于让文字每隔一个固定时间显示一次，原理就是每次显示比上次多一个字即可。
一个个显示文字
代码如下：
注意：要判...
How do I use IValidatableObject?
...lt("Prop1 must be larger than Prop2");
}
Also, if you are using MVC ModelState, you can convert the validation result failures to ModelState entries as follows (this might be useful if you are doing the validation in a custom model binder):
var resultsGroupedByMembers = validationResults
...
How do I rename an open file in Emacs?
...
Here's another version, that's pretty robust and VC aware:
(defun rename-file-and-buffer ()
"Rename the current buffer and file it is visiting."
(interactive)
(let ((filename (buffer-file-name)))
(if (not (and filename (file-exists-p filename)))
(message ...
Conditionally start at different places in storyboard from AppDelegate
...ewController in storyBoard, its a tabBarController, and all the associated VCs with tabBar are also designed in VC, so now I have a case, where I want to show walkthrough of my app, So now when my app is first launched, I want to make walkthrough VC as the root VC instead of tabBarcontroller and whe...
back button callback in navigationController in iOS
...e is called only when the user taps on the back button.
guard let vc = topViewController, item == vc.navigationItem else {
return false
}
if vc.shouldBePopped(self) {
return originalImplementationOfNavigationBar(navigationBar, shouldPop: item)
...
Is gcc std::unordered_map implementation slow? If so - why?
...:
inserts: 9280
get: 3302
Using std::map:
inserts: 23946
get: 24824
VC 2015 with all the optimization flags I know:
Using std::unordered_map:
inserts: 7289
get: 1908
Using std::map:
inserts: 19222
get: 19711
I have not tested the code using GCC but I think it may be comparable to t...
柳青：滴滴每天面临向死而生的挑战 永远热泪盈眶 - 资讯 - 清泛网 - 专注C/...
...。
我跟Will申请过，我说能不能想讲什么讲什么。他说没问题，今天你最大，你的身份特殊，想讲什么就讲什么。我想先讲讲体会，站在这很感慨，4个月前的今天，9月30日我给大家发了全员邮件，发的时候心情还是很沮丧的，...
How to make a variadic macro (variable number of arguments)
...
C99 way, also supported by VC++ compiler.
#define FOO(fmt, ...) printf(fmt, ##__VA_ARGS__)
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Upgrading PHP in XAMPP for Windows?
...ampp.
Downloaded zip from here
http://windows.php.net/download/#php-5.3-ts-VC9-x86
Unpack that zip into xampp folder.
Copied php.ini file from old php folder into new one.
Copied a couple of folders that I didn't have in the new php folder,
from old one. For example: extras, which contained browscap...
What is the difference between .cc and .cpp file suffix? [duplicate]
...fferent
language. But this can normally be overridden, and I used .cc
with VC++ long before VC++ recognized it as C++.
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