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Best way to concatenate List of String objects? [duplicate]
...If you are developing for Android, there is TextUtils.join provided by the SDK.
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How to draw border around a UILabel?
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they're available only starting SDK 3.0 :( If you want just a quick solution for debugging purpose you can set semitransparent colored background for your label.
– Vladimir
Feb 22 '10 at 15:22
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Redis 的性能幻想与残酷现实 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...验室环境的测试结果接近,而目前生产环境使用的 Redis 版本已升级到 2.8 了。如果业务量峰值继续增高,看起来单个 Redis 分片还有大约 20% 的余量就到单实例极限了。那么可行的办法就是继续增加分片的数量来分摊单个分片的压...
How to increment a NSNumber
...anyone who is using the latest version of Xcode (writing this as of 4.4.1, SDK 5.1), with the use of object literals, you can clean the code up even a little bit more...
NSNumber *x = @(1);
x = @([x intValue] + 1);
// x = 2
Still kind of a pain to deal with the boxing and unboxing everything to d...
How to show the loading indicator in the top status bar
...hen they are accessing the network. Is there a way to do the same thing in SDK apps, or is this an Apple only thing?
8 Answ...
界面布局组件 · App Inventor 2 中文网
...望组件一个一个地显示,请使用 垂直滚动条布局。
这个版本是可滚动的。
属性
水平对齐
一个数字,用于表示水平滚动条布局的内容如何水平对齐。选择分别是:
1 (左对齐)
2 (右对齐)
3 (水平居中)
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开源邮件传输代理软件 -- Postfix 介绍 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...命令,如流行的本地投递代理procmail。在流行的linux发行版本RedHat中,我们就使用procmail作为最终的本地投递代理。
远程投递代理SMTP进程根据收件人地址查询一个SMTP服务器列表,按照顺序连接每一个SMTP服务器,根据性能对该表...
How to check if current thread is not main thread
... the solutions, I think that's the best one:
boolean isUiThread = VERSION.SDK_INT >= VERSION_CODES.M
? Looper.getMainLooper().isCurrentThread()
: Thread.currentThread() == Looper.getMainLooper().getThread();
And, if you wish to run something on the UI thread, you can use this:
new Ha...
Unable to locate tools.jar
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Install the Java SDK.
Add a System Environment Variable called JAVA_HOME with the value of JDK location.
Go to Control Panel\System and Security\System. Advanced System Settings, Environment Variables, System Variables, New... Example:
Vari...
Android代码优化小技巧 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...分配内存
代码的执行效果会受到设备CPU,设备内存,系统版本等诸多因素的影响。为了确保代码能够在不同设备上都运行良好,需要最大化代码的效率。
避免创建不必要的对象
虽然GC可以回收不用的对象,可是为这些对象分配...