perl $_ 0
Thus the first argument to the function is in $_[0], the second is in $_[1], and so on. You can pass arrays and hashes as arguments like any scalar but passing more ... ,Subroutines. A subroutine may be declared as follows: sub NAME BLOCK. Any arguments passed to the routine come in as array @_, that is ($_[0], $_[1], ...).
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 perl $_ 0 相關參考資料
$_ the default variable of Perl
2013年5月17日 — Perl 有一個怪異的scalar 變數叫作$_，它叫作預設變數或是topic。 ... while (my $line = <$fh>) ; chomp $line;; my $prefix = substr $line, 0, 7;; }. https://tw.perlmaven.com Perl - Subroutines - Tutorialspoint
Thus the first argument to the function is in $_[0], the second is in $_[1], and so on. You can pass arrays and hashes as arguments like any scalar but passing more ... https://www.tutorialspoint.com PERL -- Subroutines
Subroutines. A subroutine may be declared as follows: sub NAME BLOCK. Any arguments passed to the routine come in as array @_, that is ($_[0], $_[1], ...). https://www.cs.cmu.edu Perl 教學-- 函數與字串處理
#!/usr/bin/perl sub Footer print "<h2>Perl Program Using Functions</h2>-n"; print ... 為0-n"; print "一年內的第幾天: $yday-n"; # 如果我只想要當天的日期， ($_,$_ ... http://web.nchu.edu.tw Perl 教學-- 簡單的Perl 程式 - 國立中興大學
經由Perl 提供的方法函數sqrt()，程式計算了b2 - 4ac 的平方根，並將結果指定給變數tmp；最後，計算兩個解並將結果列印出來。 解ax + bx + c = 0 (II)：這是解方程式 ... http://web.nchu.edu.tw Perl 筆記Perl note
Perl的命令列參數中，$ARGV[0] 是第一個參數，不是命令名稱，命令名稱存在$0 ... 來幫助程式設計師節省時間，而預設變數通常名稱非常特別，例如$_, $&, @_, . https://irw.ncut.edu.tw Perl的基本語法 - 海洋大學
Perl的資料型態大致分為四種：Scalar、Scalar Array、Hash ... cmp, Returns -1, 0, or 1 if the left operand is stringwise less than, equal to, or greater than the right ... 下面是一個十分精簡的寫法，和while($_=<FILE>)print &qu... http://ind.ntou.edu.tw Should I use $_[0] or copy the argument list in Perl? - Stack ...
2009年11月19日 — In this case there is no difference because you are passing reference to hash. But in case of passing scalar there will be difference: sub rtrim ... https://stackoverflow.com What are multiple $_[0] =~ operations doing? - Perl Monks
2005年4月1日 — $_[0] is the first argument to the function. The binding operator (=~) followed by s/// performs substitutions. The ge at the end says to do the ... https://www.perlmonks.org 底下利用一些例子，逐步介紹Perl 的使用從變數的定義到流程 ...
簡單的列印字串$command[0] 第一個array的值print "There are $num commands. ... 應該與19 有相同的結果, 主要不同在於變數的不同$in 與$_ while (<STDIN>) if ... http://www.mgt.ncu.edu.tw |