1、push()、pop()和unshift()、shift() 这两组同为对数组的操作，并且会改变数组的本身的长度...
#!/usr/bin/perl # create a simple array @coins = ("Quarter","Dime","Nickel"); print "1. \@coins = @coins\n"; # add one element at the end of the array push(@coins, "Penny"); print "2. \@coins = @coins\n"; # add one element at the beginning of the array unshift(@c...
while ($count <= @array) { print ("element $count: $array[$count-1]n"); $count++; } 6、子数组 @array = (1, 2, 3, 4, 5); @subarray = @array[0,1]; # @subarray = (1, 2) @subarray2 = @array[1..3]; # @subarray2 = (2,3,4) @array[0,1] = ("string", 46);...
Playing with the array indices can get this done, but it comes with a lot of baggage. First, an array slice doesn’t return an empty list, so you can’t use that as a condition in the while as in the previous examples. Since it fills in the missing elements with undef, outputting ...
print ("element $count: $array[$count-1]n"); $count++; } 6、子数组 @array = (1, 2, 3, 4, 5); @subarray = @array[0,1]; # @subarray = (1, 2) @subarray2 = @array[1..3]; # @subarray2 = (2,3,4) @array[0,1] = ("string", 46); # @array =("string",46,3...
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...
#如果传入*,表示COUNT大于等于数组长度,相当于打乱了整个数组顺序返回 LIST.roll(COUNT) #有放回取样,数值完全可以大于LIST长度 如果传入*,返回一个lazy, infinite sequence of randomly chosen elements 匹配、筛选、分类 LIST.flat LIST.flatmap(CODE) #flat之后再map ...
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Because taintedness is associated with each scalar value, some elements of an array or hash can be tainted and others not. The keys of a hash are never tainted. For example: $arg = shift; # $arg is tainted $hid = $arg, 'bar'; # $hid is also tainted $line = <>; # Tainted $...
Examples: for (@ary) { s/foo/bar/ } for my $elem (@elements) { $elem *= 2; } for $count (10,9,8,7,6,5,4,3,2,1,'BOOM') { print $count, "\n"; sleep(1); } for (1..15) { print "Merry Christmas\n"; } foreach $item (split(/:[\\\n:]*/, $ENV{TERMCAP})...