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“Server” vs “Data Source” in connection string
...ore than one of these keywords (and the address values conflict), the last item is used; the previous values are ignored. So for example, given the connection string, Server=192.168.2.2;Data Source=localhost, the client will honor the localhost value and ignore the 192... value.
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Hidden features of Android development?
...
I guess I'll start then.
A nice hidden feature I think is the Best Practices of the Android documentation. It lists plenty of great tips for designing responsive and fast apps.
Best Practices sections are:
Supporting Multiple Screens (multiple sizes and resolutions)
UI Guidelines
I...
Collection versus List what should you use on your interfaces?
...lection<T>, ReadOnlyCollection<T>, or KeyedCollection<TKey,TItem> for outputs and properties and interfaces IEnumerable<T>, ICollection<T>, IList<T> for inputs. CA1002 seems to go along with Krzysztof's comments. I can't imagine why a concrete collection would b...
How can I do a case insensitive string comparison?
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This is not the best practice in .NET framework (4 & +) to check equality
String.Compare(x.Username, (string)drUser["Username"],
StringComparison.OrdinalIgnoreCase) == 0
Use the following instead
String.Equals(x...
How do 20 questions AI algorithms work?
... artificial intelligence.
A decision tree is a binary tree that asks "the best" question at each branch to distinguish between the collections represented by its left and right children. The best question is determined by some learning algorithm that the creators of the 20 questions application use...
Difference between double and single curly brace in angular JS?
...n:
<!-- so dont do this! -->
<!-- <button ng-click="activate({{item}})">... -->
{} - single curly braces:
{} as we know stand for objects in JavaScript. Here, too, nothing different:
<div ng-init="distanceWalked = {mon:2, tue:2.5, wed:0.8, thu:3, fri:1.5,
sat:2, sun:3}">
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Android应用开发性能优化完全分析 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...archyviewer //通过命令启动HierarchyViewer
选中一个Window界面item，然后点击右上方Hierarchy window或者Pixel Perfect window（这里不介绍，主要用来检查像素属性的）即可操作。
先看下Hierarchy window，如下：
一个Activity的View树，通过这个...
TaifunPlayer 扩展（Audio Player）：音频播放器扩展，支持流媒体播放控制 ...
...px 15px rgba(0, 0, 0, .1); display: flex; flex-direction: column; align-items: center; } .feedback-pop:hover, .feedback-pop .feedback-img:hover { color: #3773f5 } .feedback-pop .feedback-img { display: inline-block; width: 24px; height: 24px; margin-bottom: 4px; background: url(/static/imag...
How can I access Google Sheet spreadsheets only with Javascript?
...to a Google Sheet, and execute it when the sheet is opened, or when a menu item (that you can define) is selected.
Here's a Quickstart/Demo. The code looks like this:
// Let's say you have a sheet of First, Last, email and you want to return the email of the
// row the user has placed the cursor o...
C++ const map element access
...iterator to the) element if it exists, it will never modify the map. If an item doesn’t exist, it returns an iterator to the map’s end().
at doesn’t exist and shouldn’t even compile. Perhaps this is a “compiler extension” (= a bug new in C++0x).
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