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图表组件 · App Inventor 2 中文网

... 图表组件用于绘制其附加数据(如二维图表数据组件)组件。有五种不同图表类型,包括折线图、面积图、散点图、条形图和饼图,可通过类型 属性修改。 图表组件有其他可以更改外观属性,例如 描述、启用网格。 ...
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What resources are shared between threads?

... From Wikipedia (I think that would make a really good answer for the interviewer :P) Threads differ from traditional multitasking operating system processes in that: processes are typically independent, while threads ...
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MySQL show current connection info

...(GPL) Protocol version: 10 Connection: localhost via TCP/IP Server characterset: latin1 Db characterset: latin1 Client characterset: gbk Conn. characterset: gbk TCP port: 3306 Uptime: 7 min 16 sec Threads: 1 Questions: 21 Slow queri...
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Where does Jenkins store configuration files for the jobs it runs?

...ns installation folder, you could create a simple jenkins job and run a script that tars all the config files for the jobs: "tar -zcvf jenkins-jobs-configs.tar.gz $(find ${JENKINS_HOME}/jobs -name config.xml -maxdepth 2) ". You could then archive jenkins-jobs-configs.tar.gz – ...
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件测试中性能测试、负载测试、压力测试 - 更多技术 - 清泛网 - 专注C/C...

件测试中性能测试、负载测试、压力测试效率作为ISO 9126内部和外部质量重要质量属性之一,其含义是在规定条件下,相对于所用资源数量,件产品可提供适当性能能力。资...效率作为ISO 9126内部和外部质量重...
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App Inventor 2开发简单计算器 - App Inventor 2 中文网 - 清泛IT论坛,有思想、有深度

计算器这个看似简单应用,当你一旦着手去制作时,就会发现写出来程序漏洞百出,那些在人类看来理所当然逻辑,对于计算机来说,却是浑然不知,一定要将每个细节都照顾到,程序才能如你所愿地运行,否则就会出现...
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App Inventor 2 SQLite 拓展:超流行兼容主流SQL语法迷你本地数据库引擎...

... App Inventor 2 SQLite 拓展:超流行兼容主流SQL语法迷你本地数据库引擎,支持事务 SQLite 拓展 中文网测试案例 打开数据库 数据库信息 创建数据表 数据表信息 ...
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C/C++中段错误(Segmentation fault) - C/C++ - 清泛网 - 专注C/C++及内核技术

C/C++中段错误(Segmentation fault)Segment fault 之所以能够流行于世,是与Glibc库中基本上所有函数都默认形参指针为非空有着密切关系。目录1。什么是段错误?2。为什 Segment fault 之所以能够流行于世,与Glibc库中基本上所有...
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BLE(二)信道&数据包&协议栈格式 - 创客硬件开发 - 清泛IT社区,...

.../ble_23.html 参考低功耗蓝牙(BLE)安全初探 0x1 信道BLE物理通道即“频道,分别是‘f=2402+k*2 MHz, k=0, … ,39’,带宽为2MHz”40个RF Channel。 其中,有3个信道是advertising channel(广播通道),分别是37、38、39,用于发现设备(...
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When is the finalize() method called in Java?

...uld make sense is if your class manages some external resource (like a TCP/IP connection, file ... anything that the Java GC can't handle). In those cases the Closable interface (and the idea behind it) is probably what you want: make .close() close/discard the resource and require the user of your ...