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界面布局组件 · App Inventor 2 中文网
...= new QRCode("qrcode", { text: window.location.href + "?f=share", //URL地址 width: 150, height: 150, colorDark: '#000000', //二维码颜色 colorLight: "#ffffff" //背景颜色}); App Inventor 2 中文网 © 2023 - document.write(new Date().getFullYear()); 跟着...
Finding what methods a Python object has
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I'm getting an AttributeError: module 'pandas.core.common' has no attribute 'AbstractMethodError' when I try to run this. See details at stackoverflow.com/q/54713287/9677043.
– Karl Baker
Feb 15 '19 at 16:26
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Why does Google +1 record my mouse movements? [closed]
...ing some other dimensions and multiplying all this by time in milliseconds mod 1000000. This definitely looks like a randomizing algorithm.
I'm not sure why the page would need something like this, perhaps it's using a cookie, preventing automated +1 clicking? When you click the "+1" the login scre...
Java Timestamp - How can I create a Timestamp with the date 23/09/2007?
...lendar, & SimpleDateFormat.
The Joda-Time project, now in maintenance mode, advises migration to the java.time classes.
To learn more, see the Oracle Tutorial. And search Stack Overflow for many examples and explanations. Specification is JSR 310.
You may exchange java.time objects directly w...
MDI CDockablePane使用总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...心得以九个例子进行总结如下：1. CFrameWndEx 在框架类的头文件中定义一个CDo...最近做项目使用到了MFC的CDockablePane进行布局，下面将应用心得以九个例子进行总结如下：
1. CFrameWndEx 在框架类的头文件中定义一个CDockablePane的数组
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Android代码优化小技巧 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...: http://developer.android.com/training/articles/perf-tips.html
原翻译地址：http://hukai.me/android-training-course-in-chinese/performance/performance-tips.html
通常来说，高效的代码需要满足下面两个规则：
不要做冗余的动作
如果能避免，尽量不要分配...
Advantages of Binary Search Trees over Hash Tables
...unction outputs have to exist in the array. The hash values can simply be modded by the length of the array to allow a smaller array. Of course, the ultimate number of elements being added may not be known, so the hash table may still allocate more space than is necessary. Binary search trees can...
Add st, nd, rd and th (ordinal) suffix to a number
... it down:
(n + 90) % 100: This expression takes the input integer − 10 mod 100, mapping 10 to 0, ... 99 to 89, 0 to 90, ..., 9 to 99. Now the integers ending in 11, 12, 13 are at the lower end (mapped to 1, 2, 3).
- 10: Now 10 is mapped to −10, 19 to −1, 99 to 79, 0 to 80, ... 9 to 89. The i...
Case conventions on element names?
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To add to Metro Smurf's answer.
The National Information Exchange Model (NIEM: http://en.wikipedia.org/wiki/National_Information_Exchange_Model) says to use:
Upper CamelCase (PascalCase) for elements.
(lower) camelCase for attributes.
The NIEM makes for a good option when you're looking...
String formatting: % vs. .format vs. string literal
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Something that the modulo operator ( % ) can't do, afaik:
tu = (12,45,22222,103,6)
print '{0} {2} {1} {2} {3} {2} {4} {2}'.format(*tu)
result
12 22222 45 22222 103 22222 6 22222
Very useful.
Another point: format(), being a function, can...