《Unix编程艺术》版权授权与技术概述

The_Art_of_Unix_Programming.pdf
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《UNIX编程艺术》(The Art of Unix Programming)，作者是埃里克·斯蒂文·雷蒙德(Eric Steven Raymond)，是一本深入探讨UNIX系统编程技巧、哲学和最佳实践的著作。该书于2003年出版，遵循Creative Commons Attribution-NoDerivs 1.0许可协议，允许在保留原作者署名的前提下免费在线传播，但纸质版的商业发行权归Pearson Education Inc.所有。 书中详细讲解了UNIX系统的精髓，强调了简洁、模块化和可维护性等核心原则，这些原则对现代软件开发具有深远影响。雷蒙德以丰富的经验和深入洞察，揭示了UNIX编程的美学和实用技巧，包括设计模式、命令行接口(CLI)的高效使用、管道通信(Pipeline)、信号处理(Signals)以及模块化的设计方法等。 书中提及的一些具体技术平台和商标包括：AIX、AS/400、DB/2、OS/2、System/360、MVS、VM/CMS、IBM PC等，这些都是IBM的代表性产品；Alpha、DEC、VAX、HP-UX、PDP、TOPS-10、TOPS-20、VMS和VT-100则是其他公司的技术品牌。此外，Amiga、Amiga OS、Apple、Macintosh、MacOS、Newton、OpenDoc、OpenStep是苹果公司的产品；ClearCase是由Rational Software公司开发的版本控制系统；Ethernet是3COM公司的网络技术；Excel、MS-DOS、Microsoft Windows和PowerPoint是微软的办公软件系列；而Java、J2EE、JavaScript、NeWS和Solaris则属于Sun Microsystems（现Oracle）的Java技术栈和操作系统；SPARC是SPARC International的处理器架构；Informix是Informix Software的数据库管理系统。 《UNIX编程艺术》不仅是一本技术指南，更是关于软件工程和系统设计的深度思考，它提倡的编程理念和实践对于任何从事系统级编程或想要提升编程技能的开发者来说，都是一份宝贵的财富。通过阅读这本书，读者能够理解和掌握如何编写高效、优雅且易于维护的代码，这是任何程序员职业生涯中不可或缺的一部分。

The Art of Unix Programming.pdf

2007-04-27 上传
《Unix编程艺术》一书由Eric Steven Raymond撰写，是一份详尽的指南，深入探讨了Unix编程的核心原则和哲学。本书不仅对Unix的历史背景进行了回顾，还对其设计理念、编程实践以及Unix文化进行了全面剖析，是理解和...

UNIX编程艺术（The.Art.of.Unix.Programming）中英版

2013-08-18 上传
《UNIX编程艺术》是计算机科学领域的一本经典之作，由著名的软件工程师Eric S. Raymond撰写。这本书详尽地探讨了UNIX操作系统的哲学、设计原则以及高效编程的技术，旨在帮助程序员理解和模仿UNIX系统的精髓，从而写...

The Art of Unix Programming

2008-04-29 上传
《The Art of Unix Programming》是Eric Steven Raymond撰写的一本经典著作，主要探讨了Unix操作系统的编程艺术和设计哲学。这本书深入解析了Unix的核心理念，并将其应用于广泛的软件开发实践中，不仅对于Unix开发者...

explain select count(0) from ( select distinct RES.ID_, RES.NAME_, ART.ASSIGNEE_, A0.TEXT_ as 'status', RES.START_TIME_, RES.END_TIME_, RES.BUSINESS_KEY_ from ACT_HI_PROCINST RES left outer join ACT_RE_PROCDEF DEF on RES.PROC_DEF_ID_ = DEF.ID_ inner join ACT_HI_VARINST A0 on RES.PROC_INST_ID_ = A0.PROC_INST_ID_ and a0.TASK_ID_ is null and A0.NAME_ = '@global_process_status' and A0.VAR_TYPE_ = 'integer' inner join ACT_HI_VARINST A1 on RES.PROC_INST_ID_ = A0.PROC_INST_ID_ and a0.TASK_ID_ is null and A1.NAME_ = '@process_form_structure' and A1.VAR_TYPE_ = 'string' left join ACT_RU_TASK ART on RES.ID_ = art.PROC_INST_ID_ where (exists ( select LINK.USER_ID_ from ACT_HI_IDENTITYLINK LINK where USER_ID_ in ("1") and LINK.PROC_INST_ID_ = RES.ID_))) table_count 怎么加索引

2023-05-24 上传
首先需要确认哪些列在查询中使用频繁，可以使用 EXPLAIN 分析查询语句，找到慢查询的具体原因。 在这个查询中，以下列被使用了： - ACT_HI_PROCINST.START_TIME_ - ACT_HI_PROCINST.END_TIME_ ...

请帮我看看这个sql语句是否正确，并改正：select a.ebeln, a.ebelp, a.art, a.kdauf, a.zbw, a.size1, a.txz01, a.menge, b.quantity, (a.menge - b.quantity) as OWE_MATERIAL, ( select sum(THIS_PLAN_QTY) as HAVE_PLAN , a.ebeln , a.ebelp , a.kdauf from SCM_OUTSOURCE_PRODUCTION_PLAN_LIST c , SCM_PROCESS_PURCHASE_ORDER_D a group by c.order_no , c.order_seq , c.sales_order , a.ebeln , a.ebelp , a.kdauf having c.order_no = a.ebeln And c.order_seq = a.ebelp And c.sales_order = a.kdauf ) , ( select a.menge - t.HAVE_PLAN as OWN_PLAY from (select sum(THIS_PLAN_QTY) as HAVE_PLAN , c.order_no , c.order_seq , c.sales_order from SCM_OUTSOURCE_PRODUCTION_PLAN_LIST c , SCM_PROCESS_PURCHASE_ORDER_D a group by c.order_no , c.order_seq , c.sales_order , a.ebeln , a.ebelp , a.kdauf having c.order_no = a.ebeln And c.order_seq = a.ebelp And c.sales_order = a.kdauf ) t , SCM_PROCESS_PURCHASE_ORDER_D a where a.ebeln = t.order_no and a.ebelp = t.order_seq and a.menge = t.sales_order ) , d.scan_qty, (d.quantity - d.scan_qty) as OWN_PRODUCE, e.scan_qty, (e.quantity - e.scan_qty) as OWE_SHIP from SCM_PROCESS_PURCHASE_ORDER_D a left join MMS_INOUT_BILL_M b On a.ebeln = b.purchase_order_number And a.ebelp = b.purchase_order_seq And a.kdauf = b.sales_order left join SCM_OUTSOURCE_PRODUCTION_PLAN_LIST c on a.ebeln = c.order_no And a.ebelp = c.order_seq And a.kdauf = c.sales_order left join SCM_PROCESS_OUTPUT d on a.ebeln = d.order_no And a.ebelp = d.order_seq And a.kdauf = d.sales_order left join SCM_OUTSOURCE_SHIP e on a.ebeln = e.qr_code and a.ebelp = e.order_no and a.kdauf = e.order_seq where a.art = 'IE7181' Order by a.ebeln desc, a.ebelp;

2023-05-24 上传
a.art, a.kdauf, a.zbw, a.size1, a.txz01, a.menge, b.quantity, (a.menge - b.quantity) AS OWE_MATERIAL, ( SELECT SUM(c.THIS_PLAN_QTY) AS HAVE_PLAN, a.ebeln, a.ebelp, a.kdauf FROM SCM_OUT...

优化sql select cir.ID, cir.NAME, mebm.type, msg.persion_num, artic.TITLE AS ARTICLE_TITLE, ( CASE WHEN top_msg.top_id IS NOT NULL THEN 'true' ELSE 'false' END ) AS is_top from CIRLE_GROUP cir LEFT JOIN GROUP_MEMBER mebm on cir.ID = mebm.GROUP_ID LEFT JOIN(select gro.ID, gro.NAME, COUNT(*) as persion_num from CIRLE_GROUP gro LEFT JOIN GROUP_MEMBER meb on gro.ID = meb.GROUP_ID GROUP BY gro.ID, gro.NAME) msg on msg.ID = cir.ID LEFT JOIN(SELECT art_msg.TITLE, art_msg.ID FROM (SELECT art.TITLE, cl.id, ROW_NUMBER() OVER ( PARTITION BY cl.id ORDER BY art.PUBLISH_TIME DESC ) AS num FROM CIRLE_GROUP cl INNER JOIN ARTICLE art ON cl.id = art.GROUP_ID where art.STATUS = '1' and art.IS_CLOSE = '0' and art.DELETE_FLAG = '0') art_msg WHERE art_msg.num = 1) artic on artic.ID = cir.ID LEFT JOIN(select ci.id, top.id as top_id, top.UPDATED_TIME from CIRLE_GROUP ci INNER JOIN GROUP_TOP top on ci.ID = top.GROUP_ID where top.USER_ID = #{pageDto.userId} and top.DELETE_FLAG = '0') top_msg on cir.ID = top_msg.id where mebm.USER_ID = #{pageDto.userId} and cir.STATUS = '0' and cir.IS_DISMISS = '0' and cir.IS_ENABLE = '1' and cir.DELETE_FLAG = '0' order by case when top_msg.top_id is not null then top_msg.top_id else '1' end desc, top_msg.UPDATED_TIME desc, mebm.TYPE asc, mebm.JOIN_TIME desc

2023-07-14 上传
WHERE art.STATUS = '1' AND art.IS_CLOSE = '0' AND art.DELETE_FLAG = '0' ) art_msg WHERE art_msg.num = 1 ) artic ON artic.ID = cir.ID LEFT JOIN ( SELECT ci.id, top.id AS top_id, top.UPDATED_TIME ...

explain select count(0) from ( select distinct RES.ID_, RES.NAME_, ART.ASSIGNEE_, A0.TEXT_ as 'status', RES.START_TIME_, RES.END_TIME_, RES.BUSINESS_KEY_ from ACT_HI_PROCINST RES left outer join ACT_RE_PROCDEF DEF on RES.PROC_DEF_ID_ = DEF.ID_ inner join ACT_HI_VARINST A0 on RES.PROC_INST_ID_ = A0.PROC_INST_ID_ and a0.TASK_ID_ is null and A0.NAME_ = '@global_process_status' and A0.VAR_TYPE_ = 'integer' inner join ACT_HI_VARINST A1 on RES.PROC_INST_ID_ = A0.PROC_INST_ID_ and a0.TASK_ID_ is null and A1.NAME_ = '@process_form_structure' and A1.VAR_TYPE_ = 'string' left join ACT_RU_TASK ART on RES.ID_ = art.PROC_INST_ID_ where (exists ( select LINK.USER_ID_ from ACT_HI_IDENTITYLINK LINK where USER_ID_ in ("1") and LINK.PROC_INST_ID_ = RES.ID_))) table_count 怎么加索引生效

2023-05-24 上传
在这个查询中，需要对以下表的列添加索引： - ACT_HI_PROCINST：ID_, START_TIME_, END_TIME_, PROC_DEF_ID_ - ACT_HI_VARINST：PROC_INST_ID_, NAME_, TASK_ID_, VAR_TYPE_ - ACT_RU_TASK：PROC_INST_ID_, ...

C:\Users\admin\AppData\Local\Android\Sdk\ndk\25.2.9519653\simpleperf>python report_html.py Traceback (most recent call last): File "report_html.py", line 1040, in <module> main() File "report_html.py", line 988, in main args = get_args() File "report_html.py", line 982, in get_args parser.add_report_lib_options() File "C:\Users\admin\AppData\Local\Android\Sdk\ndk\25.2.9519653\simpleperf\simpleperf_utils.py", line 1028, in add_report_lib_options action=argparse.BooleanOptionalAction, default=default_show_art_frames, AttributeError: module 'argparse' has no attribute 'BooleanOptionalAction 怎么修改

2023-06-02 上传
parser.add_argument('--show-art-frames', dest='show_art_frames', action='store', type=bool, default=default_show_art_frames, help='Include Java frames in call graph. Default is %s.' % default_show_art...

在mimic-iv数据库中有相同的subject_id，想计算first_day_bg中的Pco2减去first_day_bg_art中的Pco2,得到的值命名为gap，利用sql求出subject_id和gap值

2023-02-21 上传
答案：可以使用以下SQL语句来计算subject_id和gap值：SELECT subject_id, (first_day_bg.Pco2 - first_day_bg_art.Pco2) AS gap FROM mimic-iv.first_day_bg, mimic-iv.first_day_bg_art WHERE first_day_bg.subject...

mimic-iv数据库中first_day_bg中的Pco2减去first_day_bg_art中的Pco2的sql语句

2023-02-18 上传
SELECT first_day_bg.Pco2 - first_day_bg_art.Pco2 FROM mimic-iv.first_day_bg, mimic-iv.first_day_bg_art;
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