Matches the string ' wor' # (the first three letters of the first match it finds. matches the string ' wor' (' of /w{2,3}' equals ' of wor' here) 1. 2. 3. 与直觉相反.下面代码中的m" "子句: $example = ' this matches a set of words and not of numbers'; $example =~ m...
foreach() can go through all elements of an array and produce a loop. foreach $rock (qw/bedrock slate lava/){ print "One rock is $rock.\n"; } The contral variable $rock get an element every time it loops, until the last element it ends. The contral variable changes the values of...
#!/usr/bin/perl $age = 25; # An integer assignment $name = "John Paul"; # A string $salary = 1445.50; # A floating point print "Age = $age\n"; print "Name = $name\n"; print "Salary = $salary\n"; 12345678 这将产生以下结果 - Age = 25 Name = John Paul Salary = 1445.5 ...
Because of this, I can never seem to remember what equates to true and false in Perl, so I decided to create this page. In short, the following elements evalue to false in Perl: Perl array printing: How do I print the entire contents of an array with Perl? Perl array FAQ: How do...
($) sign in Perl language. This array used to store the list of values or objects and each value in the array is known as elements of an array, an array is a special type of variable in this language. We can declare an array element of any scalar values like the number, string, ...
print ("The value of \$result is $result.\n")的结果为: The value of $result is 14. .可用\nnn(8进制)或\xnn(16进制)来表示ASCII字符,如: $result = "\377"; # this is the character 255,or EOF $result = "\xff"; # this is also 255 ...
print "Hello ".$string; # "Hello world" 1. 布尔值(Booleans) Perl 没有布尔数据类型。只有如下几种值才能在 if 判断语句中返回 'false' : ·undef ·数字 0 ·字符串 "" ·字符串 "0" Perl 文档中经常提到函数在某些情况下会返回 'true' 或 'false'. 实际上,函数通常用 'return 1' 来返回真...
When an array or slice is interpolated into a double-quoted string, this variable specifies the string to put between individual elements. Default is space. O(O(OSNAME) 存储平台名 !(!(ERRNO, $OS_ERROR) 数值上下文:最近一次调用的返回值 字符串上下文:响应系统错误信息 ,(,(OFS, $OUTPUT_FIE...
socketpair- create a pair of sockets sort- sort a list of values splice- add or remove elements anywhere in an array split- split up a string using a regexp delimiter sprintf- formatted print into a string sqrt- square root function ...
win7系统，用c#调用Interop.SHDocVw.dll时，报了个对“ COM 组件的调用返回了错误 HRESULT E_FAIL”的...