idx_0.htm

编程珍珠,里面很多好用的代码,大家可以参考学习呵呵,

  <a name="::-in-fully-qualified-names">
  <dt>:: in fully qualified names: <a href="../ch02_05.htm#INDEX-495">2.5. Names</a></dt>
</dl></dd>

<a name="-comma">
<dt>, (comma)</dt><dd><dl>
  <a name="delimiting-list-values">
  <dt>delimiting list values: <a href="../ch02_08.htm#INDEX-677">2.8. List Values and Arrays</a></dt><dd><dl>
    <dt><a href="../ch02_08.htm#INDEX-686">2.8. List Values and Arrays</a></dt>
  </dl></dd>
  <a name="error-in-print-statements">
  <dt>error in print statements: <a href="../ch24_01.htm#INDEX-4103">24.1.1. Universal Blunders</a></dt>
  <a name="key-value-pairs-and">
  <dt>key/value pairs and: <a href="../ch01_02.htm#INDEX-96">1.2.1.2.2. Hashes.</a></dt><dd><dl>
    <dt><a href="../ch02_09.htm#INDEX-709">2.9. Hashes</a></dt>
  </dl></dd>
  <a name="large-numbers-and">
  <dt>large numbers and: <a href="../ch02_06.htm#INDEX-540">2.6.1. Numeric Literals</a></dt>
  <a name="operator">
  <dt>operator: <a href="../ch03_18.htm#INDEX-1011">3.18. Comma Operators</a></dt><dd><dl>
    <dt><a href="../ch03_18.htm#INDEX-1012">3.18. Comma Operators</a></dt>
    <dt>(see also <a href="idx_=.htm#=&gt;-operator">=&gt; operator</a>)</dt>
    <a name="in-scalar-context">
    <dt>in scalar context: <a href="../ch24_01.htm#INDEX-4181">24.1.5. Previous Perl Traps</a></dt>
  </dl></dd>
  <a name="as-separator">
  <dt>as separator: <a href="../ch01_02.htm#INDEX-108">1.2.1.3. Complexities</a></dt>
</dl></dd>



<a name="$^T-$BASETIME">
<dt>$^T ($BASETIME): <a href="../ch03_10.htm#INDEX-924">3.10. Named Unary and File Test Operators</a></dt>
<a name="$.-$INPUT_LINE_NUMBER">
<dt>$. ($INPUT_LINE_NUMBER): <a href="../ch03_15.htm#INDEX-978">3.15. Range Operator</a></dt>
<a name="$-dollar-sign">

<dt>$ (dollar sign): <a href="../ch01_02.htm#INDEX-104">1.2.1.2.2. Hashes.</a></dt><dd><dl>
  <a name="$-dollar-sign;-prototype-character">
<dt>prototype character: <a href="../ch06_04.htm#INDEX-1859">6.4. Prototypes</a></dt>
<a name="in-debugger">
  <dt>in debugger: <a href="../ch20_01.htm#INDEX-3514">20.1. Using the Debugger</a></dt>
  <a name="$#-prefix">
  <dt>$# prefix: <a href="../ch02_08.htm#INDEX-700">2.8.2. Array Length</a></dt>
  <a name="$$-current-process-ID">
  <dt>$$ (current process ID): <a href="../ch02_05.htm#INDEX-487">2.5. Names</a></dt>
  <a name="$?-exit-status-last-child-process">
  <dt>$? (exit status, last child process): <a href="../ch02_05.htm#INDEX-488">2.5. Names</a></dt>
  <a name="$-variables">
  <dt>$ variables</dt><dd><dl>
    <a name="$^O-variable">
    <dt>$^O variable: <a href="../ch25_01.htm#INDEX-4313">25. Portable Perl</a></dt>
  </dl></dd>
  <a name="line-boundary">
  <dt>line boundary: <a href="../ch05_06.htm#INDEX-1618">5.6.2. Endings: The \z, \Z, and $ Assertions</a></dt>
  <a name="in-matching">
  <dt>in matching: <a href="../ch05_02.htm#INDEX-1374">5.2.2. The m// Operator (Matching)</a></dt>
  <a name="metacharacter">
  <dt>metacharacter: <a href="../ch05_01.htm#INDEX-1275">5.1. The Regular Expression Bestiary</a></dt><dd><dl>
    <dt><a href="../ch05_03.htm#INDEX-1465">5.3. Metacharacters and Metasymbols</a></dt>
  </dl></dd>
  <a name="for-scalar-variable-names">
  <dt>for scalar variable names: <a href="../ch01_02.htm#INDEX-85">1.2.1.2.1. Arrays.</a></dt><dd><dl>
    <dt><a href="../ch02_04.htm#INDEX-449">2.4. Variables</a></dt>
  </dl></dd>
  <a name="scalar-variable-interpolation-and">
  <dt>scalar variable interpolation and: <a href="../ch02_06.htm#INDEX-580">2.6.2. String Literals</a></dt>
  <a name="signifying-scalar-variables">
  <dt>signifying scalar variables: <a href="../ch01_02.htm#INDEX-36">1.2.1. Variable Syntax</a></dt>
  <a name="word-boundary">
  <dt>word boundary: <a href="../ch01_07.htm#INDEX-385">1.7.3. Nailing Things Down</a></dt>
</dl></dd>

<a name="$!-variable">
<dt>$! variable: <a href="../ch01_05.htm#INDEX-250">1.5.5. Logical Operators</a></dt>
<a name="$-variables">
<dt>$ variables</dt><dd><dl>
  <a name="$0-$PROGRAM_NAME">
  <dt>$0 ($PROGRAM_NAME): <a href="../ch28_02.htm#INDEX-4566">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="$a-and-$b-sort-variables">
  <dt>$a and $b (sort variables): <a href="../ch28_02.htm#INDEX-4398">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="@'">
  <dt>@': <a href="../ch05_07.htm#INDEX-1652">5.7.1. Capturing</a></dt>
  <a name="@&amp;">
  <dt>@&amp;: <a href="../ch05_07.htm#INDEX-1650">5.7.1. Capturing</a></dt>
  <a name="$'-$POSTMATCH">
  <dt>$' ($POSTMATCH): <a href="../ch24_02.htm#INDEX-4206">24.2.1. Time Efficiency</a></dt><dd><dl>
    <dt><a href="../ch28_02.htm#INDEX-4559">28.2. Special Variables in Alphabetical Order</a></dt>
  </dl></dd>
  <a name="$*">
  <dt>$*: <a href="../ch28_02.htm#INDEX-4397">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="$@-$EVAL_ERROR">
  <dt>$@ ($EVAL_ERROR): <a href="../ch28_02.htm#INDEX-4447">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="$--$OUTPUT_RECORD_SEPARATOR">
  <dt>$\ ($OUTPUT_RECORD_SEPARATOR): <a href="../ch28_02.htm#INDEX-4550">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="$`-$PREMATCH">
  <dt>$` ($PREMATCH): <a href="../ch24_02.htm#INDEX-4207">24.2.1. Time Efficiency</a></dt><dd><dl>
    <dt><a href="../ch28_02.htm#INDEX-4561">28.2. Special Variables in Alphabetical Order</a></dt>
  </dl></dd>
  <a name="$!-$OS_ERROR">
  <dt>$! ($OS_ERROR): <a href="../ch28_02.htm#INDEX-4534">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="${^WARNING_BITS}">
  <dt>${^WARNING_BITS}: <a href="../ch28_02.htm#INDEX-4598">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="$]-$PERL_VERSION">
  <dt>$] ($PERL_VERSION): <a href="../ch28_02.htm#INDEX-4527">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="$^-$FORMAT_TOP_NAME">
  <dt>$^ ($FORMAT_TOP_NAME): <a href="../ch07_01.htm#INDEX-1913">7.1. Format Variables</a></dt><dd><dl>
    <dt><a href="../ch07_02.htm#INDEX-1935">7.2. Footers</a></dt>
    <dt><a href="../ch24_01.htm#INDEX-4124">24.1.1. Universal Blunders</a></dt>
    <dt><a href="../ch28_02.htm#INDEX-4484">28.2. Special Variables in Alphabetical Order</a></dt>
  </dl></dd>

  <a name="$^A-$ACCUMULATOR">
  <dt>$^A ($ACCUMULATOR): <a href="../ch07_02.htm#INDEX-1938">7.2.1. Accessing Formatting Internals</a></dt><dd><dl>
    <dt><a href="../ch28_02.htm#INDEX-4400">28.2. Special Variables in Alphabetical Order</a></dt>
    <a name="formline-function-output">
    <dt>formline function output: <a href="../ch29_02.htm#INDEX-4793">29.2.42. formline</a></dt>
  </dl></dd>
  <a name="$^C-$COMPILING">
  <dt>$^C ($COMPILING): <a href="../ch28_02.htm#INDEX-4425">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="$^D-$DEBUGGING">
  <dt>$^D ($DEBUGGING): <a href="../ch19_01.htm#INDEX-3395">19.1.3. Switches</a></dt><dd><dl>
    <dt><a href="../ch28_02.htm#INDEX-4431">28.2. Special Variables in Alphabetical Order</a></dt>
  </dl></dd>
  <a name="$^E-$EXTENDED_OS_ERROR">
  <dt>$^E ($EXTENDED_OS_ERROR): <a href="../ch28_02.htm#INDEX-4458">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="$^F-$SYSTEM_FD_MAX">
  <dt>$^F ($SYSTEM_FD_MAX): <a href="../ch28_02.htm#INDEX-4591">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="$^H">
  <dt>$^H: <a href="../ch28_02.htm#INDEX-4488">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="$^I-$INPLACE_EDIT">
  <dt>$^I ($INPLACE_EDIT): <a href="../ch28_02.htm#INDEX-4497">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="$^L-$FORMAT_LINEFEED">
  <dt>$^L ($FORMAT_LINEFEED): <a href="../ch07_01.htm#INDEX-1917">7.1. Format Variables</a></dt>
  <a name="$^M">
  <dt>$^M: <a href="../ch28_02.htm#INDEX-4519">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="$^O-$OSNAME">
  <dt>$^O ($OSNAME): <a href="../ch28_02.htm#INDEX-4530">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="$^P-$PERLDB">
  <dt>$^P ($PERLDB): <a href="../ch28_02.htm#INDEX-4552">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="$^S-$EXCEPTIONS_BEING_CAUGHT">
  <dt>$^S ($EXCEPTIONS_BEING_CAUGHT): <a href="../ch28_02.htm#INDEX-4450">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="$^T-$BASETIME">
  <dt>$^T ($BASETIME): <a href="../ch28_02.htm#INDEX-4414">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="$^V-$PERL_VERSION">
  <dt>$^V ($PERL_VERSION): <a href="../ch28_02.htm#INDEX-4554">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="$^W-$WARNING">
  <dt>$^W ($WARNING): <a href="../ch28_02.htm#INDEX-4594">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="$^X-$EXECUTABLE_NAME">
  <dt>$^X ($EXECUTABLE_NAME): <a href="../ch28_02.htm#INDEX-4452">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="$:-$FORMAT_LINE_BREAK_CHARACTERS">
  <dt>$: ($FORMAT_LINE_BREAK_CHARACTERS): <a href="../ch07_01.htm#INDEX-1901">7. Formats</a></dt><dd><dl>
    <dt><a href="../ch28_02.htm#INDEX-4472">28.2. Special Variables in Alphabetical Order</a></dt>
  </dl></dd>

  <a name="$-$LIST_SEPARATOR">
  <dt>$, ($LIST_SEPARATOR): <a href="../ch28_02.htm#INDEX-4517">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="$$-$PROCESS_ID">
  <dt>$$ ($PROCESS_ID): <a href="../ch28_02.htm#INDEX-4563">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="$.-$INPUT_LINE_NUMBER">
  <dt>$. ($INPUT_LINE_NUMBER): <a href="../ch28_02.htm#INDEX-4500">28.2. Special Variables in Alphabetical Order</a></dt><dd><dl>
    <a name="resetting-with-close-function">
    <dt>resetting with close function: <a href="../ch29_02.htm#INDEX-4699">29.2.16. close</a></dt>
  </dl></dd>
  <a name="$=-$FORMAT_LINES_PER_PAGE">
  <dt>$= ($FORMAT_LINES_PER_PAGE): <a href="../ch07_01.htm#INDEX-1915">7.1. Format Variables</a></dt><dd><dl>
    <dt><a href="../ch28_02.htm#INDEX-4470">28.2. Special Variables in Alphabetical Order</a></dt>
  </dl></dd>

  <a name="@`">
  <dt>@`: <a href="../ch05_07.htm#INDEX-1653">5.7.1. Capturing</a></dt>
  <a name="$&lt;-$REAL_USER_ID">
  <dt>$&lt; ($REAL_USER_ID): <a href="../ch28_02.htm#INDEX-4578">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="$line">
  <dt>$line: <a href="../ch01_06.htm#INDEX-309">1.6.2.1. The while and until statements</a></dt>
  <a name="$--$FORMAT_LINES_LEFT">
  <dt>$- ($FORMAT_LINES_LEFT): <a href="../ch07_01.htm#INDEX-1910">7. Formats</a></dt><dd><dl>
    <dt><a href="../ch07_02.htm#INDEX-1936">7.2. Footers</a></dt>
    <dt><a href="../ch28_02.htm#INDEX-4468">28.2. Special Variables in Alphabetical Order</a></dt>
  </dl></dd>

  <a name="$-$EFFECTIVE_GROUP_ID">
  <dt>$) ($EFFECTIVE_GROUP_ID): <a href="../ch28_02.htm#INDEX-4436">28.2. Special Variables in Alphabetical Order</a></dt><dd><dl>
    <dt><a href="../ch28_02.htm#INDEX-4576">28.2. Special Variables in Alphabetical Order</a></dt>
  </dl></dd>
  <a name="$-$REAL_GROUP_ID">
  <dt>$( ($REAL_GROUP_ID): <a href="../ch28_02.htm#INDEX-4574">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="$%-$FORMAT_PAGE_NUMBER">
  <dt>$% ($FORMAT_PAGE_NUMBER): <a href="../ch07_01.htm#INDEX-1914">7.1. Format Variables</a></dt><dd><dl>
    <dt><a href="../ch28_02.htm#INDEX-4482">28.2. Special Variables in Alphabetical Order</a></dt>
  </dl></dd>

  <a name="@+">
  <dt>@+: <a href="../ch05_07.htm#INDEX-1651">5.7.1. Capturing</a></dt>
  <a name="$?-$CHILD_ERROR">
  <dt>$? ($CHILD_ERROR): <a href="../ch28_02.htm#INDEX-4418">28.2. Special Variables in Alphabetical Order</a></dt><dd><dl>
    <a name="backtick-operator-and">
    <dt>backtick operator and: <a href="../ch02_11.htm#INDEX-739">2.11.1. Command Input (Backtick) Operator</a></dt>
    <a name="close-function-and">
    <dt>close function and: <a href="../ch29_02.htm#INDEX-4700">29.2.16. close</a></dt>
  </dl></dd>
  <a name="$&gt;-$EFFECTIVE_USER_ID">
  <dt>$&gt; ($EFFECTIVE_USER_ID): <a href="../ch28_02.htm#INDEX-4438">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="$[semi]-$SUBSCRIPT_SEPARATOR">
  <dt>$[semi] ($SUBSCRIPT_SEPARATOR): <a href="../ch28_02.htm#INDEX-4587">28.2. Special Variables in Alphabetical Order</a></dt>
  
<a name="$#">
  <dt>$#</dt><dd><dl>
    <a name="obsolete-variable-for-numeric-output">
    <dt>obsolete variable for numeric output: <a href="../ch28_02.htm#INDEX-4396">28.2. Special Variables in Alphabetical Order</a></dt>
  </dl></dd>
  <a name="$&amp;">
  <dt>$&amp;: <a href="../ch05_02.htm#INDEX-1327">5.2. Pattern-Matching Operators</a></dt>
  <a name="$`">
  <dt>$`: <a href="../ch05_02.htm#INDEX-1326">5.2. Pattern-Matching Operators</a></dt>
  <a name="${^-internal-variable-names">
  <dt>${^ (internal variable names): <a href="../ch02_05.htm#INDEX-489">2.5. Names</a></dt>
  <a name="$^W">
  <dt>$^W: <a href="../ch04_09.htm#INDEX-1244">4.9.1. Controlling Warnings</a></dt>
  <a name="$;-SUBSCRIPT_SEPARATOR">
  <dt>$; (SUBSCRIPT_SEPARATOR): <a href="../ch02_09.htm#INDEX-721">2.9. Hashes</a></dt>
  <a name="$'">
  <dt>$': <a href="../ch05_02.htm#INDEX-1328">5.2. Pattern-Matching Operators</a></dt>
  <a name="$--$INPUT_RECORD_SEPARATOR">
  <dt>$/ ($INPUT_RECORD_SEPARATOR): <a href="../ch19_01.htm#INDEX-3371">19.1.3. Switches</a></dt><dd><dl>
    <dt><a href="../ch28_02.htm#INDEX-4503">28.2. Special Variables in Alphabetical Order</a></dt>
  </dl></dd>
  <a name="$~-$FORMAT_NAME">
  <dt>$~ ($FORMAT_NAME): <a href="../ch07_01.htm#INDEX-1912">7.1. Format Variables</a></dt><dd><dl>
    <dt><a href="../ch28_02.htm#INDEX-4476">28.2. Special Variables in Alphabetical Order</a></dt>
  </dl></dd>
  <a name="$_-$ARG-;glob-function-with">
  <dt>$_ ($ARG) ;glob function with: <a href="../ch02_11.htm#INDEX-762">2.11.3. Filename Globbing Operator</a></dt>
  <a name="$_-variable">
  <dt>$_ variable: <a href="../ch01_07.htm#INDEX-349">1.7. Regular Expressions</a></dt><dd><dl>
    <dt><a href="../ch01_07.htm#INDEX-376">1.7.1. Quantifiers</a></dt>
  </dl></dd>
  <a name="$|-$OUTPUT_AUTOFLUSH">
  <dt>$| ($OUTPUT_AUTOFLUSH): <a href="../ch07_01.htm#INDEX-1916">7.1. Format Variables</a></dt><dd><dl>
    <dt><a href="../ch28_02.htm#INDEX-4538">28.2. Special Variables in Alphabetical Order</a></dt>
  </dl></dd>
  <a name="${^WIDE_SYSTEM_CALLS}">
  <dt>${^WIDE_SYSTEM_CALLS}: <a href="../ch15_01.htm#INDEX-2820">15.1. Building Character</a></dt><dd><dl>
    <dt><a href="../ch28_02.htm#INDEX-4602">28.2. Special Variables in Alphabetical Order</a></dt>
  </dl></dd>
</dl></dd>
<a name=".-dot-;concatenation-operator">
<dt>. (dot) ;concatenation operator: <a href="../ch24_02.htm#INDEX-4223">24.2.1. Time Efficiency</a></dt>
<a name="=;-equal-sign">
<dt>=; (equal sign)</dt><dd><dl>
  <a name="=;&gt;-corresponds-to-operator">
  <dt>=;&gt; (corresponds to) operator: <a href="../ch03_18.htm#INDEX-1015">3.18. Comma Operators</a></dt>
</dl></dd>

<a name="right-angle-bracket">
<dt>&gt; (right angle bracket)</dt><dd><dl>
  <a name="in-debugger-commands">
  <dt>in debugger commands: <a href="../ch20_02.htm#INDEX-3562">20.2.6. Actions and Command Execution</a></dt>