idx_e.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="env-program-starting-Perl-with">
<dt>env program, starting Perl with: <a href="../ch19_01.htm#INDEX-3342">19.1. Command Processing</a></dt>
<a name="environment">
<dd><dl>
  <a name="cleaning-up">
  <dt>cleaning up: <a href="../ch23_01.htm#INDEX-3991">23.1.2. Cleaning Up Your Environment</a></dt>
</dl></dd>
<a name="environment-variables">
<dt>environment variables: <a href="../ch19_02.htm#INDEX-3470">19.2. Environment Variables</a></dt><dd><dl>
  <dt><a href="../ch28_02.htm#INDEX-4444">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="Env-module">
  <dt>Env module: <a href="../ch32_01.htm#INDEX-5640">32.1.13. Perl Language Extensions and Internals</a></dt>
  <a name="modules-Perl-use-of">
  <dt>modules, Perl use of: <a href="../ch19_02.htm#INDEX-3496">19.2. Environment Variables</a></dt>
  <a name="PERLDB_OPTS-setting-debugger-options-with">
  <dt>PERLDB_OPTS, setting debugger options with: <a href="../ch20_04.htm#INDEX-3645">20.4. Unattended Execution</a></dt>
  <a name="PERL_DESTRUCT_LEVEL">
  <dt>PERL_DESTRUCT_LEVEL: <a href="../ch12_06.htm#INDEX-2516">12.6.1. Garbage Collection with DESTROY Methods</a></dt>
  <a name="portability-of">
  <dt>portability of: <a href="../ch25_04.htm#INDEX-4343">25.4. System Interaction</a></dt>
  <a name="shells-vs.-Perl">
  <dt>shells vs. Perl: <a href="../ch24_01.htm#INDEX-4157">24.1.4. Shell Traps</a></dt>
  <a name="taint-checking">
  <dt>taint checking: <a href="../ch23_01.htm#INDEX-3973">23.1. Handling Insecure Data</a></dt>
</dl></dd>
<a name="EOF-end-of-file">
<a name="eof-function">
<dt>eof function: <a href="../ch01_06.htm#INDEX-312">1.6.2.1. The while and until statements</a></dt><dd><dl>
  <dt><a href="../ch24_02.htm#INDEX-4228">24.2.1. Time Efficiency</a></dt>
  <dt><a href="../ch29_02.htm#INDEX-4740">29.2.31. eof</a></dt>
  <a name="tied-filehandle-using-on">
  <dt>tied filehandle, using on: <a href="../ch14_04.htm#INDEX-">14.4.1. Filehandle-Tying Methods</a></dt>
</dl></dd>
<a name="eq-operator">
<dt>eq operator: <a href="../ch24_01.htm#INDEX-4108">24.1.1. Universal Blunders</a></dt>
<a name="equal-method">
<dt>equal method: <a href="../ch17_02.htm#INDEX-3165">17.2.1.5. Identifying threads</a></dt>
<a name="equal-to-=-operator">
<dt>equal to (=) operator: <a href="../ch03_12.htm#INDEX-944">3.12. Equality Operators</a></dt>
<a name="equality-operators">
<dt>equality operators: <a href="../ch03_12.htm#INDEX-943">3.12. Equality Operators</a></dt>
<a name="erasing">
<dt>erasing (see <a href="idx_d.htm#deleting">deleting</a>)
</dt>
<a name="errno">
<dt>errno: <a href="../ch28_02.htm#INDEX-4537">28.2. Special Variables in Alphabetical Order</a></dt><dd><dl>
  
</dl></dd>
<a name="Errno-module">
<dt>Errno module: <a href="../ch32_01.htm#INDEX-5641">32.1.13. Perl Language Extensions and Internals</a></dt>
<a name="error-messages">
<dt>error messages: <a href="../ch24_03.htm#INDEX-4271">24.3. Programming with Style</a></dt><dd><dl>
  <dt><a href="../ch33_01.htm#INDEX-5825">33. Diagnostic Messages</a></dt>
  <a name="user-efficiency-improving-with">
  <dt>user efficiency, improving with: <a href="../ch24_02.htm#INDEX-4244">24.2.6. User Efficiency</a></dt>
</dl></dd>
<a name="errors">
<dt>errors: <a href="../ch29_02.htm#INDEX-4776">29.2.38. fileno</a></dt><dd><dl>
  <dt><a href="../ch33_01.htm#INDEX-5828">33. Diagnostic Messages</a></dt>
  <a name="Carp-module">
  <dt>Carp module: <a href="../ch32_03.htm#INDEX-5805">32.3. Carp</a></dt>
  <a name="CGI::Carp-module-handling-of">
  <dt>CGI::Carp module, handling of: <a href="../ch32_05.htm#INDEX-5808">32.5. CGI::Carp</a></dt>
  <a name="$@-variable-for">
  <dt>$@ variable for: <a href="../ch28_02.htm#INDEX-4446">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="$!-variable-for">
  <dt>$! variable for: <a href="../ch28_02.htm#INDEX-4536">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="$?-variable-for">
  <dt>$? variable for: <a href="../ch28_02.htm#INDEX-4420">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="failed-symbol-exports">
  <dt>failed symbol exports: <a href="../ch11_02.htm#INDEX-2322">11.2.1.3. Managing unknown symbols</a></dt>
  <a name="insecure-data">
  <dt>insecure data: <a href="../ch23_01.htm#INDEX-3980">23.1. Handling Insecure Data</a></dt>
  <a name="number-errno">
  <a name="out-of-memory-errors">
  <dt>out-of-memory errors: <a href="../ch28_02.htm#INDEX-4523">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="subroutines">
  <dt>subroutines: <a href="../ch06_02.htm#INDEX-1825">6.2.2. Error Indications</a></dt>
  <a name="warn-function-producing-error-messages">
  <dt>warn function, producing error messages: <a href="../ch29_02.htm#INDEX-5410">29.2.199. warn</a></dt>
  <a name="writing-to-httpd-or-other-CGI-errors-logs">
  <dt>writing to httpd or other CGI errors logs: <a href="../ch32_01.htm#INDEX-5582">32.1.9. World Wide Web</a></dt>
</dl></dd>
<a name="ESC-character">
<dt>ESC character: <a href="../ch02_06.htm#INDEX-564">2.6.2. String Literals</a></dt>
<a name="ESC-in-octal">
<dt>ESC in octal: <a href="../ch02_06.htm#INDEX-565">2.6.2. String Literals</a></dt>
<a name="escape-sequences-for-control-characters">
<dt>escape sequences for control characters: <a href="../ch02_06.htm#INDEX-556">2.6.2. String Literals</a></dt>
<a name="-etc-group-file">
<dt>/etc/group file: <a href="../ch24_02.htm#INDEX-4230">24.2.1. Time Efficiency</a></dt><dd><dl>
  <dt><a href="../ch29_02.htm#INDEX-4809">29.2.44. getgrent</a></dt>
</dl></dd>
<a name="-etc-hosts-file">
<dt>/etc/hosts file: <a href="../ch29_02.htm#INDEX-4835">29.2.49. gethostent</a></dt>
<a name="-etc-networks-file">
<dt>/etc/networks file: <a href="../ch29_02.htm#INDEX-4854">29.2.53. getnetent</a></dt>
<a name="-etc-passwd-file">
<dt>/etc/passwd file: <a href="../ch24_02.htm#INDEX-4229">24.2.1. Time Efficiency</a></dt><dd><dl>
  <dt><a href="../ch29_02.htm#INDEX-4885">29.2.61. getpwent</a></dt>
</dl></dd>
<a name="-etc-protocols-file">
<dt>/etc/protocols file: <a href="../ch29_02.htm#INDEX-4881">29.2.60. getprotoent</a></dt>
<a name="-etc-services-file">
<dt>/etc/services file: <a href="../ch29_02.htm#INDEX-4906">29.2.66. getservent</a></dt>
<a name="-etc-utmp-file">
<dt>/etc/utmp file: <a href="../ch29_02.htm#INDEX-4842">29.2.50. getlogin</a></dt>
<a name="eval">
<dt>eval: <a href="../ch02_05.htm#INDEX-509">2.5.1. Name Lookups</a></dt><dd><dl>

<dt><a href="../ch03_01.htm#INDEX-809">3.1. Terms and List Operators (Leftward)</a></dt>

<dt><a href="../ch08_01.htm#INDEX-1946">8. References</a></dt>
  <dt><a href="../ch24_02.htm#INDEX-4208">24.2.1. Time Efficiency</a></dt>
  <dt><a href="../ch29_02.htm#INDEX-4743">29.2.32. eval</a></dt>
  <a name="die-function-and">
  <dt>die function and: <a href="../ch29_02.htm#INDEX-4728">29.2.25. die</a></dt>
  <a name="loops-and">
  <dt>loops and: <a href="../ch24_02.htm#INDEX-4210">24.2.1. Time Efficiency</a></dt>
    <dt>loop controls and: <a href="../ch04_05.htm#INDEX-1138">4.5. Bare Blocks</a></dt><a name="packages-and">
  <dt>packages and: <a href="../ch10_01.htm#INDEX-2219">10. Packages</a></dt>
  <a name="translating-with-variables">
  <dt>translating with variables: <a href="../ch05_02.htm#INDEX-1447">5.2.4. The tr/// Operator (Transliteration)</a></dt>

<a name="eval-method">

  <a name="restricted-reval">
  <dt>restricted (reval): <a href="../ch23_03.htm#INDEX-4069">23.3.1.1. Restricting namespace access</a></dt>
  <a name="threads-catching-exceptions-with">
  <dt>threads, catching exceptions with: <a href="../ch17_02.htm#INDEX-3156">17.2.1.3. Catching exceptions from join</a></dt>
</dl></dd>
<a name="$EVAL_ERROR">
<dt>$EVAL_ERROR: <a href="../ch28_02.htm#INDEX-4448">28.2. Special Variables in Alphabetical Order</a></dt>
<a name="eval_sv-and-eval_pv-functions">
<dt>eval_sv and eval_pv functions: <a href="../ch21_04.htm#INDEX-3772">21.4.4. Evaluating a Perl Statement from C</a></dt>
<a name="exceptions">
<dd><dl>
  <a name="-intercepting">
  <dt> intercepting: <a href="../ch28_02.htm#INDEX-4583">28.2. Special Variables in Alphabetical Order</a></dt>
  <a name="in-detached-child-threads">
  <dt>in detached child threads: <a href="../ch17_02.htm#INDEX-3160">17.2.1.4. The detach method</a></dt>
  <a name="die-function-and">
  <dt>die function and: <a href="../ch29_02.htm#INDEX-4727">29.2.25. die</a></dt>
  <a name="fatal-errors-causing">
  <a name="functions-raising">
  <dt>functions raising: <a href="../ch29_02.htm#INDEX-4627">29.2. Perl Functions in Alphabetical Order</a></dt>
  <a name="insecure-data">
  <dt>insecure data: <a href="../ch23_01.htm#INDEX-3981">23.1. Handling Insecure Data</a></dt>
  <a name="modules-for">
  <dt>modules for: <a href="../ch32_01.htm#INDEX-5670">32.1.15. Warnings and Exceptions</a></dt>
  <a name="raising-on-failure">
  <dt>raising on failure: <a href="../ch32_01.htm#INDEX-5643">32.1.13. Perl Language Extensions and Internals</a></dt>
  <a name="raising-to-indicate-subroutine-errors">
  <dt>raising to indicate subroutine errors: <a href="../ch06_02.htm#INDEX-1827">6.2.2. Error Indications</a></dt>
  <a name="threads-catching">
  <dt>threads, catching: <a href="../ch17_02.htm#INDEX-3155">17.2.1.3. Catching exceptions from join</a></dt>
  <a name="trapping">
  <dt>trapping: <a href="../ch29_02.htm#INDEX-4745">29.2.32. eval</a></dt>
</dl></dd>
<a name="$EXCEPTIONS_BEING_CAUGHT">
<dt>$EXCEPTIONS_BEING_CAUGHT: <a href="../ch28_02.htm#INDEX-4451">28.2. Special Variables in Alphabetical Order</a></dt>
<a name="exclusive-file-locks">
<dt>exclusive file locks: <a href="../ch16_02.htm#INDEX-2960">16.2.1. File Locking</a></dt><dd><dl>
  <a name="obtaining">
  <dt>obtaining: <a href="../ch16_02.htm#INDEX-2964">16.2.1. File Locking</a></dt>
</dl></dd>
<a name="exclusive-or-xor-operator">
<dt>exclusive or (xor) operator: <a href="../ch03_13.htm#INDEX-959">3.13. Bitwise Operators</a></dt><dd><dl>
  <dt><a href="../ch03_20.htm#INDEX-1022">3.20. Logical and, or, not, and xor</a></dt>
</dl></dd>
<a name="exec-function">
<dt>exec function: <a href="../ch29_02.htm#INDEX-4748">29.2.33. exec</a></dt><dd><dl>
  <a name="filehandles-leaving-open-across-calls">
  <dt>filehandles, leaving open across calls: <a href="../ch16_02.htm#INDEX-2977">16.2.2. Passing Filehandles </a></dt>
  <a name="list-argument-form-avoiding-shell-with">
  <dt>list argument form, avoiding shell with: <a href="../ch23_03.htm#INDEX-4083">23.3.2. Code Masquerading as Data</a></dt>
  <a name="portability-of">
  <dt>portability of: <a href="../ch25_05.htm#INDEX-4351">25.5. Interprocess Communication (IPC)</a></dt>
</dl></dd>
<a name="executable-files">
<a name="executable-image-file">
<dt>executable image file: <a href="../ch18_01.htm#INDEX-3236">18.1. The Life Cycle of a Perl Program</a></dt>
<a name="$EXECUTABLE_NAME">
<dt>$EXECUTABLE_NAME: <a href="../ch28_02.htm#INDEX-4453">28.2. Special Variables in Alphabetical Order</a></dt>
<a name="execute-bit">
<a name="executing">
<dt>executing</dt><dd><dl>
  <a name="code">
  <dt>code: <a href="../ch18_03.htm#INDEX-3254">18.3. Executing Your Code</a></dt>
  <a name="code-conditionally">
  <dt>code, conditionally: <a href="../ch01_05.htm#INDEX-249">1.5.5. Logical Operators</a></dt>
  <a name="methods">
  <dt>methods: <a href="../ch12_03.htm#INDEX-2363">12.3. Method Invocation</a></dt>
  <a name="other-programs-from-Perl">
  <dt>other programs from Perl: <a href="../ch29_02.htm#INDEX-5329">29.2.174. system</a></dt>
  <a name="Perl-program">
  <dt>Perl program: <a href="../ch01_03.htm#INDEX-150">1.3.1. How to Do It</a></dt>
  <a name="Perl-programs">
  <dt>Perl programs: <a href="../ch19_01.htm#INDEX-3322">19.1. Command Processing</a></dt>
</dl></dd>
<a name="execution">
<dt>execution</dt><dd><dl>
  <a name="code-order-of">
  <dt>code, order of: <a href="../ch18_07.htm#INDEX-3316">18.7. Avant-Garde Compiler, Retro Interpreter</a></dt>
  <a name="Perl-programs">
  <dt>Perl programs: <a href="../ch18_01.htm#INDEX-3241">18.1. The Life Cycle of a Perl Program</a></dt>
  <a name="unattended-debugger">
  <dt>unattended, debugger: <a href="../ch20_04.htm#INDEX-3638">20.4. Unattended Execution</a></dt>
</dl></dd>
<a name="execv-function-in-C">
<dt>execv function (in C): <a href="../ch29_02.htm#INDEX-4752">29.2.33. exec</a></dt>