Perl读取文本格式化后写入文本
发布时间:2020-12-16 00:04:30 所属栏目:大数据 来源:网络整理
导读:demo: #!/usr/bin/perl -w#Perl pragma to restrict unsafe constructsuse strict;use utf8;#main functionsub main { #get params # @_ # Within a subroutine the array @_ contains the parameters passed to that subroutine. # Inside a subroutine,@_
#!/usr/bin/perl -w #Perl pragma to restrict unsafe constructs use strict; use utf8; #main function sub main { #get params # @_ # Within a subroutine the array @_ contains the parameters passed to that subroutine. # Inside a subroutine,@_ is the default array for the array operators push,pop,shift,and unshift. # set source file location my $s_file = "example_file.txt"; # set destinate file location my $d_file = "file_1.txt"; # notice and exit if $s_file or $d_file is null die "must have source file and destination file!n" unless $s_file && $d_file; #open file for read,FO file handler if ( open(FO,$s_file) ) { if ( open(FOO,">$d_file") ) { #do while loop while(<FO>) { # $_ general variables my $line = $_; # remove head and tail blank $line =~ s{^s|s$}{}g; # use,split line # split /PATTERN/,EXPR. use what split depend on your file delimiter my @items = split/,/,$line; # write some item to new file print FOO $items[1] . "|" . $items[0] . " "; } # close file handler close(FOO); } else { # open file fail print "open destination file $d_file errorn"; } # close file handler close(FO); } else { # open file fail print "open source file $s_file errorn"; } } # pass params to main function,# @ARGV # The array @ARGV contains the command-line arguments intended for the script. main(@ARGV); (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |