Question

大家好我对perl很新。我有一个像$string = "hi\n how are \t you?";字符串这样的字符串本身包含"\n"和"\t"。我怎么用什么都替换它们？

代表：

verfText  = "Verify the following in ESIS-5000 display:\n" 
verfText += " - The Air Data Source submenu is displayed as following from top to bottom:\n"
verfText += "\ta)Submenu Title\n\tb)Standby Source\n\tc)ADS Source\n\td)Back Button\n\n" 
verfText += " - The air data source submenu title with the "  
verfText += "text 'ADS' on line one and 'Source' on line two.\n\n" 
verfText += " - Standby Source(ADS4) validity is valid and the Standby Source menu item is shown as a radio button " 
verfText += "with the label 'STBY' on line one and 'ADS' on line two.\n\n" 
verfText += " - Label 'ADS' on line one and 'Source' on line two in ADS Source momentary submenu button and " 
verfText += "it is displayed in white."

我想替换字符串中的所有"\n"和"\t"，请帮帮我。

Answer 1

您可以使用tr运算符

$string =~ tr|\n\t||d;

解释

/d修饰符删除已找到但未替换的字符。

另一方面，如果你想替换

中的文字\n和\t

$string = 'hi\n how are \t you?';

然后你可以使用正则表达式，

$string =~ s|\\[nt]||g;

Answer 2

您的代码看起来不像perl。没有分号，你使用+ =，这是数字而不是。=这是字符串。看起来应该更像这样：

#!/usr/bin/perl
use strict;
use warnings;

my $verfText;

$verfText  = "Verify the following in ESIS-5000 display:\n" ;
$verfText .= " - The Air Data Source submenu is displayed as following from top to bottom:\n";
$verfText .= "\ta)Submenu Title\n\tb)Standby Source\n\tc)ADS Source\n\td)Back Button\n\n" ;
$verfText .= " - The air data source submenu title with the "  ;
$verfText .= "text 'ADS' on line one and 'Source' on line two.\n\n" ;
$verfText .= " - Standby Source(ADS4) validity is valid and the Standby Source menu item is shown as a radio button " ;
$verfText .= "with the label 'STBY' on line one and 'ADS' on line two.\n\n" ;
$verfText .= " - Label 'ADS' on line one and 'Source' on line two in ADS Source momentary submenu button and " ;
$verfText .= "it is displayed in white." ;

#print $verfText;

$verfText =~ s/[\t\n]//g;

print $verfText;

Answer 3

我希望这对你有用..尝试一次。

"hi\nhow are \t you?".replace(/[\n|\t]/g, "");

如果没有告诉我什么是错的。好的

所以你使用的是verfText变量，最后写下这一行

verfText = verfText.replace(/[\n|\t]/g, "");

如何更换＆＃34; \ n＆＃34;和＆＃34; \ t＆＃34;从一个字符串

3 个答案: