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构建高并发高可用的电商平台架构实践 - 更多技术 - 清泛网 - 专注C/C++及内核技术
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B树索引适合于查询为主导的场景，避免多次的IO，提高查询的效率。
倒排索引实现单词到文档映射关系的最佳实现方式和最有效的索引结构，广泛用在搜索领域。
Bitmap是一种非常简洁快速的数据结构，他能同时使存...
How to remove debugging from an Express app?
... like to remove the debugging mode. I am using express , redis , socket.io and connect-redis , but I do not know where the debugging mode comes from.
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Error : The service is invalid
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Xcode and the GDB connection is quite temperamental. The device and your Mac can become unsynchronised with each other. My checklist for this sort of thing:
Restart Xcode.
Delete the .app from your iOS device, do a Clean then Rebuild.
Disconnect, r...
How to programmatically get iOS status bar height
... that currently the status bar (with the time, battery, and network connection) at the top of the iPhone/iPad is 20 pixels for non-retina screens and 40 pixels for retina screens, but to future proof my app I would like to be able to determine this without hard coding values. Is it possible to figur...
UILabel Align Text to center
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From iOS 6 and later UITextAlignment is deprecated. use NSTextAlignment
myLabel.textAlignment = NSTextAlignmentCenter;
Swift Version from iOS 6 and later
myLabel.textAlignment = .center
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Convert String to System.IO.Stream [duplicate]
I need to convert a String to System.IO.Stream type to pass to another method.
5 Answers
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UIWebView background is set to Clear Color, but it is not transparent
I'm developing an iOS 4 application using iOS SDK latest version and XCode 4.2.
8 Answers
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How to display the default iOS 6 share action sheet with available share options?
Some apps show a default action sheet in iOS 6 with sharing options.
2 Answers
2
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iOS Simulator too big [duplicate]
The iOS Simulator is too large on the screen. I saw all the settings but nothing. Please help me!
2 Answers
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【解决】iOS 14任务栏出现一块空白 - 创意 - 清泛网 - 专注C/C++及内核技术
【解决】iOS 14任务栏出现一块空白升级到iOS 14后，发现任务栏出现了一块空白，如图：是家庭中心显示的区域出现的空白，影响显示效果。可以去 设置 -> "控制中心"，将家庭控制显示关掉，这样就没有空白区域了： 升级到iOS 1...