runtime

Measuring CPU time in c++

由 青春壹個敷衍的年華 提交于 2019-12-01 14:49:07
问题 If I had the following code clock_t t; t = clock(); //algorithm t = clock() - t; t would equal the number of ticks to run the program. Is this the same is CPU time? Are there any other ways to measure CPU time in C++? OS -- Debian GNU/Linux I am open to anything that will work. I am wanting to compare the CPU time of two algorithms. 回答1: clock() is specified to measure CPU time however not all implementations do this. In particular Microsoft's implementation in VS does not count additional

Running PHP from Java

由 China☆狼群 提交于 2019-12-01 14:46:31
I am trying to run the following from java file. I am trying to display the php version and later will change to run php files. Process p = Runtime.getRuntime().exec("cmd /C PHP/php.exe -v"); BufferedReader in = new BufferedReader(new InputStreamReader( p.getInputStream())); String line = null; while ((line = in.readLine()) != null) { System.out.println(line); } When I run the program, there is no error. but console is not displaying anything :( Thank you. You have to wait for the process to execute and you must separate the arguments : Process p = Runtime.getRuntime().exec("cmd", "/C", "PHP

How can we handle enable/disable background audio abilities at runtime on iOS devices?

由 穿精又带淫゛_ 提交于 2019-12-01 14:13:54
I know how to set up my iOS application to make it playing audio in background (= when another application is used on the iOS device) using the plist. Some applications like: - BLOOM - some radio players provides a basic UISwitch to enable or disable this behavior. Any ideas about how to do that ? Have an iVar of type UIBackgroundTaskIdentifier in the main class that handles audio playing code, initialize this with beginBackgroundTaskWithExpirationHandler.... method before starting the audio player and use endBackgroundTask when audio player completes. Code: @inerface AudioPlayerController :

SUBMIT标准程序取ALV数据

由 我与影子孤独终老i 提交于 2019-12-01 13:31:48
示例1： /*--> */ /*--> */ 调用J3RFLVMOBVEDH ，取物料的期初/ 期末庫存数、金额 FORM frm_call_j3rflvmobvedh. DATA: lr_bukrs TYPE RANGE OF bukrs, ls_bukrs LIKE LINE OF lr_bukrs, lr_datum TYPE RANGE OF datum, ls_datum LIKE LINE OF lr_datum. DATA: lo_data TYPE REF TO data. DATA: lv_buper TYPE buper. FIELD-SYMBOLS: <fs_t_data> TYPE ANY TABLE. ls_bukrs-sign = 'I'. ls_bukrs-option = 'EQ'. ls_bukrs-low = p_bukrs. APPEND ls_bukrs TO lr_bukrs. * Caculate the first & last day of the Month lv_buper = |{ gv_gjahr }{ gv_monat }|. ls_datum-sign = 'I'. ls_datum-option = 'BT'. ls_datum-low = gv_start_date. ls_datum-high = gv_end

Setting the OnClick procedure of a Delphi button at runtime

由 半腔热情 提交于 2019-12-01 13:07:40
问题 I have a program in which I need to update a database table with information entered into edit boxes, with a button at the end to do the updating. However, the form is created at runtime and all the elements including the button are also created in the same way. I figured a way to allow the database arguments would be to define a procedure to update the database such as: procedure UpdateDatabase(Field1,Field2,Field3:string); begin //update database here... end; Then assign the OnClick event

前端需要掌握的Babel知识

由 风流意气都作罢 提交于 2019-12-01 12:14:54
Babel 是怎么工作的 Babel 是一个 JavaScript 编译器。 做与不做 注意很重要的一点就是， Babel 只是转译新标准引入的语法，比如： 箭头函数 let / const 解构 哪些在 Babel 范围外？对于新标准引入的全局变量、部分原生对象新增的原型链上的方法，Babel 表示超纲了。 全局变量 Promise Symbol WeakMap Set includes generator 函数 对于上面的这些 API， Babel 是不会转译的，需要引入 polyfill 来解决。 Babel 编译的三个阶段 Babel 的编译过程和大多数其他语言的编译器相似，可以分为三个阶段： 解析（Parsing）：将代码字符串解析成抽象语法树。 转换（Transformation）：对抽象语法树进行转换操作。 生成（Code Generation）: 根据变换后的抽象语法树再生成代码字符串。 为了理解 Babel ，我们从最简单一句 console 命令下手 解析（Parsing） Babel 拿到源代码会把代码抽象出来，变成 AST （抽象语法树），学过编译原理的同学应该都听过这个词，全称是 Abstract Syntax Tree 。 抽象语法树是源代码的抽象语法结构的树状表示，树上的每个节点都表示源代码中的一种结构，只所以说是抽象的

Flink Runtime核心机制剖析

由 南楼画角 提交于 2019-12-01 12:08:24
本文主要介绍 Flink Runtime 的作业执行的核心机制。本文将首先介绍 Flink Runtime 的整体架构以及 Job 的基本执行流程，然后介绍在这个过程，Flink 是怎么进行资源管理、作业调度以及错误恢复的。最后，本文还将简要介绍 Flink Runtime 层当前正在进行的一些工作。 查看原文 。 来源： https://www.cnblogs.com/cjblogs/p/11684827.html

Create .java file and compile it to a .class file at runtime

由 有些话、适合烂在心里 提交于 2019-12-01 11:50:56
I'm generating a whole bunch of .java files from an XSD file using XJC. I also need to compile those files to .class files and use them at runtime via reflection. The problem I'm having is that after I generate the .java files and try to compile them, the compiler can't compile them properly and gives me the following error: .\src\com\program\data\ClassOne.java:44: error: cannot find symbol protected List<ClassTwo> description; ^ symbol: class ClassTwo location: class ClassOne I'm assuming this has to do with the fact that the JVM doesn't know about the package I just generated and as such can

netcore安装与卸载

由 家住魔仙堡 提交于 2019-12-01 11:35:44
按照官网的指示安装netcore3.0，但是运行时提示需要netcore2.2，为保持干净，尝试卸载netcore3.0。 yum remove netcore 失败，原因是没有提供正确的包名。使用rpm查询： rpm -qa | grep netcore # q表示查询，a表示所有 查找失败。后经排查，我安装的是dotnet-runtime-3.0的运行时： 官网上的文档：“The previous command will install the .NET Core Runtime Bundle, which includes the .NET Core runtime and the ASP.NET Core runtime. To install just the .NET Core runtime, use the dotnet-runtime-3.0 package.” 按dotnet查找： rpm -qa | grep dotnet 可以找到对应的运行时，然后通过rpm erase将包及依赖一一删除。 来源： https://www.cnblogs.com/Jackie-Snow/p/11683408.html

Runtime.getRuntime().exec(“C:\\cygwin\\bin\\bash.exe”) has no input to read

由 走远了吗. 提交于 2019-12-01 10:43:12
I'm trying to execute a new process and read from its input stream in Java. I have successfully used Runtime.getRuntime().exec(String) to start and receive input from several processes. However, when I try to use exec on some other processes, the input stream's read method blocks, and it appears that there is no input. What might be causing the input stream to be empty for some of these processes? Specifically, I am wondering why bash.exe is not outputting anything. I have written a JUnit test case to demonstrate this issue: import java.io.IOException; import java.io.InputStream; import java
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