The question is for perl.
例如,如果我有<条码>“hello.world”,而具体特性是.,那么我想要的结果是<条码>“hello”。
见http://p3rl.org/index"rel=“noreferer”>perldoc -findex:
$x = "hello.world";
$y = substr($x, 0, index($x, . ));
使用substr:
my $string = "hello.world";
my $substring = substr($string, 0, index($string, "."));
或使用reg
my ($substring2) = $string =~ /(.*)?./;
use strict;
use warnings;
my $string = "hello.world";
my $dot = index($string, . );
my $word = substr($string, 0, $dot);
print "$word
";
本着TIMTOWTDI的精神,引入新的特征: 利用non-destructive Options
my $partial = $string =~ s/..*//sr;
灰色<代码>*末将贯穿第一阶段之后的一切,包括可能的新线特性(/s 备选办法),但保留原始示意图,排除要求区长强制规定名单环境(/r.
百分数:
If the /r (non-destructive) option is used then it runs the substitution on a copy of the string and instead of returning the number of substitutions, it returns the copy whether or not a substitution occurred. The original string is never changed when /r is used. The copy will always be a plain string, even if the input is an object or a tied variable.
另一种可能性:
my $string = hello.world ;
print ((split /./, $string)[0], "
");
I have a simple problem that says: A password for xyz corporation is supposed to be 6 characters long and made up of a combination of letters and digits. Write a program fragment to read in a string ...
The == operator is used to compare two strings in shell script. However, I want to compare two strings ignoring case, how can it be done? Is there any standard command for this?
I wrote below code to readin line by line from stdin ex. city=Boston;city=New York;city=Chicago and then split each line by ; delimiter and print each record. Then in yet another loop I try to ...
I tried to print all the possible combination of members of several vectors. Why the function below doesn t return the string as I expected? #include <iostream> #include <vector> #...
I m trying to initialize string with iterators and something like this works: ifstream fin("tmp.txt"); istream_iterator<char> in_i(fin), eos; //here eos is 1 over the end string s(in_i, ...
I have a string "pc1|pc2|pc3|" I want to get each word on different line like: pc1 pc2 pc3 I need to do this in C#... any suggestions??
Is there a PHP string function that transforms a multi-line string into a single-line string? I m getting some data back from an API that contains multiple lines. For example: <p>Some Data</...
I was trying to speed up a certain routine in an application, and my profiler, AQTime, identified one method in particular as a bottleneck. The method has been with us for years, and is part of a "...