EN思路： 2分查找数组中的第一个k： 1. 如果中间数字大于k，那么k只可能出现在前半段 2. 如果中...
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);...
#!/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...
和Perl 5 一样,Perl 6也有数组push/pop/shift/unshift/的方法,不过push/unshift的如果是数组,则会保留数据结构,而不会展开。 ARRAY.pop ARRAY.shift ARRAY.push: VALUES ARRAY.push(VALUES) ARRAY.unshift: VALUES ARRAY.unshift(VALUES)#不像Perl5中,会把VALUES数组flatten,Perl6会保留数据结构#可以同时指定多个...
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...
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...
@stuff = (@giant, undef, @giant); # a list with 200,001 elements $dino = "granite"; @quarry = (@rocks, "crushed rock", @tiny, $dino); 如上,使用@就可以访问整个Array,非常方便。所以,用@copy = @quarry; 就表示将数组quarry中的所有元素赋给copy数组。
Playing with the array indices can get this done, but it comes with a lot of baggage. First, an array slice doesn’t return an empty list, so you can’t use that as a condition in the while as in the previous examples. Since it fills in the missing elements with undef, outputting ...
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$array[0] = 'Monday'; ... $array[6] = 'Sunday'; 1234 访问数组元素 (Accessing Array Elements) 从数组访问单个元素时,必须在变量前面加上美元符号($),然后在变量名称后面的方括号中附加元素索引。 例如 - #!/usr/bin/perl @days = qw/Mon Tue Wed Thu Fri Sat Sun/; print "$days[0]\n";...