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App Inventor 计时器在界面设计中的哪里?如何确定计时器有没有执行? - Ap...
...定执行没?
答:在“传感器”下面:
也可在组件搜索框中进行搜索:
计时器怎么启动?
默认计时器是自动启用的,也可程序控制它“启用计时”和“不启用计时”。
怎么确定执行没?
定一个数字全局变量,计时...
how to use ng-option to set default value of select element
... your array of objects are complex like:
$scope.friends = [{ name: John , uuid: 1234}, {name: Joe, uuid, 5678}];
And your current model was set to something like:
$scope.user.friend = {name:John, uuid: 1234};
It helped to use the track by function on uuid (or any unique field), as long as the ...
移动前端开发之viewport的深入理解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...,就是无论你给layout viewpor设置的宽度是多少,而又没有指定初始的缩放值的话,那么iphone和ipad会自动计算initial-scale这个值,以保证当前layout viewport的宽度在缩放后就是浏览器可视区域的宽度,也就是说不会出现横向滚动条。...
How to speed up insertion performance in PostgreSQL
...
If you happend to insert colums with UUIDs (which is not exactly your case) and to add to @Dennis answer (I can't comment yet), be advise than using gen_random_uuid() (requires PG 9.4 and pgcrypto module) is (a lot) faster than uuid_generate_v4()
=# explain anal...
Rails 4: List of available datatypes
...
For Postgres there is additionally a uuid type which can be used as normal field like t.uuid :name... or as primary key like create_table :users, id: :uuid do... or e.g. t.primary_key :id, :uuid, :default => 'uuid_generate_v1()'
– TNT
...
项目管理实践【三】每日构建【Daily Build Using CruiseControl.NET and MS...
...
<buildArgs>/p:configuration=debug</buildArgs>
<!--指定日志记录模块-->
<!--我这里的CruiseControl.NET 安装在D盘,你们使用时候,改成自己的安装路径即可-->
<logger>ThoughtWorks.CruiseControl.MsBuild.XmlLogger,D:\Program Fi...
Homebrew作者解不出面试题,被Google拒绝 - 创意 - 清泛网 - 专注C/C++及内核技术
...mebrew是Mac上一套流行的软件包管理工具,可以通过命令行搜索、安装、卸载软件包。近日,其作者在进入Google的面试中,因解不出一个二叉 Homebrew是Mac上一套流行的软件包管理工具,可以通过命令行搜索、安装、卸载软件包。...
CentOS+Nginx+PHP+MySQL详细配置(图解) - 更多技术 - 清泛网 - 专注C/C++及内核技术
...果是按着上面笔者的步骤一步步走下来,安装Nginx时只需指定Nginx的安装路径即可
#tar zxvf nginx-0.8.24.tar.gz
#cd nginx-0.8.24
#./configure --prefix=/usr/local/nginx //此处在本环节只需指定一个路径
#make && make install
#/usr/local/nginx/sbin/nginx ...
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
...可,哎呀,关于这个工具的使用我是真的不想说了,自己搜索吧,实在简单、传统的不行了。
PS:这是开发中使用频率非常高的一个工具之一,麻烦务必掌握其核心使用技巧,虽然Android Studio已经实现了部分功能,但是真的很难...
Mocking static methods with Mockito
...ception occurred while fetching localhost address", e);
return UUID.randomUUID().toString();
}
}
}
My test class:
@RunWith(PowerMockRunner.class)
@PrepareForTest(SmokeRouteBuilder.class)
public class SmokeRouteBuilderTest {
@Test
public void testSmokeMessageId_exce...
