精华内容
下载资源
问答
  • extract

    2017-01-23 13:27:17
    $a = "Original"; $my_array = array("a" => "Cat","b" => "Dog", "c" => "Horse"); extract($my_array); echo "\$a = $a; \$b = $b; \$c = $c"; ?> $a = Cat; $b = Dog; $c = Horse
    <?php
    $a = "Original";
    $my_array = array("a" => "Cat","b" => "Dog", "c" => "Horse");
    extract($my_array);
    echo "\$a = $a; \$b = $b; \$c = $c";
    ?>

    $a = Cat; $b = Dog; $c = Horse
    展开全文
  • Extract

    千次阅读 2011-10-28 13:46:40
    Extract 是SAP中除内表外的另一种大量内存数据处理方式,允许用户动态地存储并排序结构化数据,同时通过循环处理。在一个ABAP程序中,最多只能创建一个未命名的ABAP ExtractExtract的数据行数和列数都是动态可变...

    Extract 是SAP中除内表外的另一种大量内存数据处理方式,允许用户动态地存储并排序结构化数据,同时通过循环处理。在一个ABAP程序中,最多只能创建一个未命名的ABAP ExtractExtract的数据行数和列数都是动态可变的。

    EXTRACT的行结构分配的语法:FIELD-GROUPS FG.

    字段组FG的具体结构则通过下述语句在程序中动态生成:INSERT F1 F2 ... INTO FG.

        其中F1、F2是程序定义的内部全局数据对象,其类型需为扁平结构。

    填充EXTRACT的语法格式为:EXTRACT FG.

        该语句将定义好的字段组填充给Extract,在同一个Extract中可以包含多个不同结构的字段组。如果一个字段组被命名为HEADER,则其被视为是其他所有字段组的标题行,并将作为标准排序关键字使用。

    Extract 可以使用SORT语句排序,使用LOOP语句逐行获得字段组,当这些语句中没有内表名称出现时,则视为对Extract进行操作。

    Extract在处理具有部分相同字段的多个数据库表时常使用。

    例子:

    DATA:
    F1 TYPE I,
    F2 TYPE I.

    FIELD-GROUPS HEADER.
    INSERT F1 F2 INTO HEADER.

    DO 10 TIMES.
    F1 = SY-INDEX.
    F2 = SY-INDEX ** 2.
    EXTRACT HEADER.
    ENDDO.

    SORT DESCENDING.

    LOOP.
    WRITE:
        / F1,
          F2.
    ENDLOOP.


    展开全文
  • EXTRACT

    2011-10-31 10:09:03
    EXTRACT Syntax EXTRACT [ header | field_group ]. Effect This statement links the current content of the fields, which were until then included in the field group
    Syntax Diagram
    
    

    EXTRACT

    Syntax

    EXTRACT [ header | field_group ].

    Effect

    This statement links the current content of the fields, which were until then included in the field group header resp. field_group via the statement INSERT , to the extract dataset of the program. If there is no field group specified after EXTRACT, then the field group header is implicitly added.

    At the first execution of the EXTRACT-statement of a program, the extract dataset is created and the first line added. After execution of an EXTRACT-statement, it is not allowed to incorporate other fields to the specified field group field_group with the INSERT statement. If you do so, an uncatchable exception will be raised at the next EXTRACT-statement for the same field group.

    Notes

    • As the field group header is the beginning part and sort key of every field group, it is not allowed to incorporate fields into header after execution of the first EXTRACT statement.
    • The lines of an extract dataset cannot be explicitly deleted and will be kept alive as long as the internal mode of the program.


    Example

    This example continues the example under INSERT. If the executable program is linked to a fitting logical data base, the fields of the field groups flight_info and flight_date are attached to the extract dataset during the GET-events.

    REPORT demo_extract.

    NODES: spfli, sflight.

    FIELD-GROUPS: header, flight_info, flight_date.

    START-OF-SELECTION.

    INSERT: spfli-carrid spfli-connid sflight-fldate
              INTO header,
            spfli-cityfrom spfli-cityto
              INTO flight_info.

    GET spfli.
      EXTRACT flight_info.

    GET sflight.
      EXTRACT flight_date.

    Exceptions

    Non-Catchable Exceptions

    • Cause: EXTRACT after SORT or LOOP.
      Runtime Error: EXTRACT_AFTER_SORT/LOOP
    • Cause: Not enough roll memory to create the extracts.
      Runtime Error: EXTRACT_BUFFER_NO_ROLL
      Runtime Error: EXTRACT_NO_ROLL_OLD_KEY
    • Cause: The occupied lenght of a single field is too large.
      Runtime Error: EXTRACT_FIELD_TOO_LARGE
    • Cause: Problems at creation of the extract dataset master file.
      Runtime Error: EXTRACT_FILE_PTR_NOT_EMPTY
      Runtime Error: EXTRACT_INIT_DIR_EXTRACT
      Runtime Error: EXTRACT_INIT_FILEMASK_INVALID
      Runtime Error: EXTRACT_INIT_FILEMASK_TOO_LARG
      Runtime Error: EXTRACT_INIT_FN_EXTRACT
    • Cause: Field group HEADER was modified after extraction of records with EXTRACT.
      Runtime Error: EXTRACT_HEADER_NOT_UNIQUE
    • Cause: Local data is not allowed in field groups.
      Runtime Error: EXTRACT_INSERT_LOCAL_DATA
    • Cause: Error when opening the external extract dataset master file.
      Runtime Error: EXTRACT_OPEN_EXTRACTFILE_OPEN
    • Cause: Total data length of a record to be extracted (inclusive HEADER-fields) is too large.
      Runtime Error: EXTRACT_TOO_LARGE








    展开全文
  • Extract Method

    2019-02-18 14:18:23
    附件是在阅读完《重构 改善既有代码的设计》之后,在重新组织函数章中Extract Method的整理文档,分享期待有所帮助
  • <div><p>I am using Nanopolish extract to extract the fastq from fast5 files: <pre><code> nanopolish extract -q -o nanopolish-extract.fastq -r fast5 </code></pre> <p>but I am getting the following ...
  • extractData

    2011-10-28 08:45:12
    extractData
  • 以上是EXTRACT()函数的使用说明,有个很重要的部分.就是extract 抽取年月日部分和时分部分的使用方法是不同的.EXTRACT(YEAR FROMOracle范例:SELECT EXTRACT(YEAR FROM SYSDATE) FROM DUAL;// return Current Year...

    以上是EXTRACT()函数的使用说明,有个很重要的部分.就是extract 抽取年月日部分和时分部分的使用方法是不同的.EXTRACT(YEAR FROM

    Oracle范例:

    SELECT EXTRACT(YEAR FROM SYSDATE) FROM DUAL;// return Current Year

    SELECT EXTRACT(MONTH FROM SYSDATE) FROM DUAL; //return Current Month

    SELECT EXTRACT(DAY FROM SYSDATE) FROM DUAL; //return Current Day

    SELECT EXTRACT(HOUR FROM SYSDATE) FROM DUAL;//Error

    SELECT EXTRACT(HOUR FROM TIMESTAMP '2005-10-10 10:10:10') FROM DUAL;// Correct

    SELECT EXTRACT(MINUTE FROM SYSDATE) FROM DUAL;//Error

    SELECT EXTRACT(MINUTE FROM TIMESTAMP '2005-10-10 10:10:10') FROM DUAL;// Correct

    以上是EXTRACT()函数的使用说明,有个很重要的部分.就是extract 抽取年月日部分和时分部分的使用方法是不同的.

    EXTRACT(YEAR FROM SYSDATE)中FROM 的下一个参数是日期类型的时候可以抽取年月日.就是说这个参数是日期类型的时候就可以抽取年\月\日,而抽取不了时\分部分.抽取时分部分得在FROM 后面加带TIMESTAMP 且后面加时间字符.

    这里要注意,在(MINUTE FROM TIMESTAMP '2005-10-10 10:10:10')中,如果把'2005-10-10 10:10:10'用日期类型的字段来代替并转换成字符类型后,也是错误的,估计是这方法的问题.

    比如(MINUTE FROM TIMESTAMP to_date(to_char(日期类型,'YYYY-MM-DD hh24:mi:ss'),'YYYY-MM-DD hh24:mi:ss')),这样执行不了的.

    如果真要从日期类型的字段中抽取时\分部分用to_char() 函数就可以了.比如to_char(日期类型,'hh24:mi')

    logo.gif

    f68f2add0b68e4f9810432fce46917b7.png

    本文原创发布php中文网,转载请注明出处,感谢您的尊重!

    展开全文
  • extract函数

    2019-05-31 21:37:15
    php extract函数 变量覆盖漏洞 extract(array,extract_rules,prefix) EXTR_SKIP - 如果有冲突,不覆盖已有的变量。
  • extract.exe

    2017-11-03 10:22:40
    extract解压命令【dos】 【命令格式】要解压的程序文件名(含后缀)/extract:盘符:\解压后放置文件的目录。如 office2010x86.exe/extract:d:\down\office 【使用步骤】运行cmd,转入要解压程序文件所在目录;输入...
  • sql extract

    2020-09-02 09:43:24
    定义和用法 EXTRACT() 函数用于返回日期/时间的单独部分,比如年、月、日、小时、分钟等等。 语法 EXTRACT(unit FROM date) unit可以是MONTH,WEEK,DAY,HOUR,MINUTE,SECOND等
  • Extract Dataset

    2019-10-09 03:37:18
    Extract Datasets简称为Extract,是SAP中除了内表之外的另一种大量内存数据处理方式,允许用户动态地存储并排序结构化数据,同时通过循环处理,与内表相比,Extract的数据行数也可以是动态的,但是内表的行结构固定,...
  • pass-extract-源码

    2021-03-25 19:19:01
    pass-extract
  • oracle extract

    2017-12-21 15:38:00
    selectextract(yearfromsystimestamp) year ,extract(monthfromsystimestamp) month ,extract(dayfromsystimestamp) day ,extract(minutefromsystimestamp) minute ,e...
  • sb3extract.rar

    2020-04-03 17:46:26
    把sb3文件放在和sb3extract.exe同一个文件夹,然后双击sb3extract.exe即可抽取素材。
  • ExtractData

    2011-11-21 10:44:22
    ExtractData119 游戏资源提取软件
  • extract( PHP 4中, PHP 5中)extract-导入到当前变量符号表从一个数组描述国际extract物(数组$ var_array [摘要$ extract_type = EXTR_OVERWRITE [ ,字符串$前缀] ] )进口变量数组到当前符号表。检查每一个关键看它...
  • Batch extract mode

    2020-12-09 14:41:51
    <div><p>Requirement - Extract concepts with no limitation with satisfying criteria passed as ECL. Offline processing done to extract more information needed for business purpose. <p>Eg : Need to ...
  • ve got a problem with nanopolish extract. It's work without any error but after work it doesn't give any extracted sequences. We have communicate: [extract] found 136375 files, extracted 0 ...
  • Add CuPy extract

    2021-01-12 02:49:42
    <div><p>Would be useful to have an <a href="https://docs.scipy.org/doc/numpy/reference/generated/numpy.extract.html#numpy.extract"><code>extract</code></a> implementation for CuPy arrays.</p><p>该提问...
  • extract函数从数组中将变量导入到当前的符号表。该函数使用数组键名作为变量名,使用数组键值作为变量值。针对数组中的每个元素,将在当前符号表中创建对应的一个变量。第二个参数 type 用于指定当某个变量已经存在...
  • Unable to extract

    2020-12-08 18:07:05
    <p>ERROR: Unable to extract JS player URL; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see ...
  • docs-extract-源码

    2021-03-18 17:13:44
    doc_extract_new
  • TF-IDF keyword extract

    2018-07-08 21:09:14
    TF-IDF keyword extract TF-IDF keyword extract TF-IDF keyword extract
  • <p>There is currently a bit of uncertainty regarding the future of extract-text-webpack-plugin and sokraj's mini-css-extract-plugin. Unfortunately despite this plugin being one of the most ...
  • coral_extract.dll

    2020-02-13 23:05:27
    coral_extract.dll
  • Able2Extract Pro

    2018-10-18 13:59:25
    Able2Extract Pro(PDF转换工具)
  • EXTRACT.EXE

    2012-08-27 00:21:45
    EXTRACT.EXE
  • PLSQL EXTRACT函数用于从日期或间隔值中提取特定值,例如年,月,日或小时。用法:EXTRACT(field FROM source)使用的参数:EXTRACT函数接受两个参数:field –它用于指定需要提取的组件。source –它用于指定从中提取...

空空如也

空空如也

1 2 3 4 5 ... 20
收藏数 53,147
精华内容 21,258
关键字:

extract