my @array = (1, 2, 3, 4, 3, 5); my $element_to_delete = 3; @array = grep { $_ != $element_to_delete } @array; print "@array"; # 输出: 1 2 4 5 使用delete函数: 虽然delete通常用于删除哈希表中的键值对,但它也可以用于数组。不过,使用delete删除数组元素后,该位置将变为undef...
15 if(numarray[i]==numarray[j]){ 16 delete @num_array[$j]; #剔除重复的元素 17 } 18 } 19 20 } 21 22 print "剔除数组中冗余元素后,将数组由大到小排序: "; 23 my @new_array; 24 foreach my $element(@num_array){ 25 print $element."_"; 26 if($element=~m/\d/){ 27 push...
@array = ( ); Defines an empty array @array = (“a”, “b”, “c”); Defines an array with values $array[0] The first element of @array $array[0] = a; Sets the first element of @array to a @array[3..5] Array slice - returns a list containing the 3rd thru 5th elements ...
$scalar=@array;#$scalar=3,即@array的长度 ($scalar)=@array;#$scalar=1,即@array第一个元素的值 注:以Perl数组的长度为循环次数可如下编程: $count=1; while($count<=@array){ print("element$count:$array[$count-1]\n"); $count++; } 1. 2. 3. 4. 5. 6. 7. 8. 9. 6、子Perl数组...
replacing Array Element @nums = (1..20); @num[3] = 99 splice(@nums, 5, 4, 21..24); Transform String to Arrays $var_string = "Rain-Drops-On-Roses-And-Whiskers-On-Kittens"; @string = split('-', $var_string); Transform Arrays to String $string1 = join( '-', @string ); ...
访问数组元素: my $element = $array[0]; # 访问第一个元素 复制代码添加元素到数组: push @array, 6; # 在数组末尾添加元素 复制代码删除数组元素: pop @array; # 删除数组末尾元素 复制代码遍历数组: foreach my $element (@array) { print $element . "\n"; } 复制代码哈希操作:...
代码语言:javascript 代码运行次数:0 运行 AI代码解释 subwhich_element_is { my($what, @array) = @_; foreach (0..$#array) { if ($array[$_] eq $what) { return $_; } } -1; } 上面子程序实质上是找出某个元素在数组中的索引,其使用如下所示: ...
因此,我们将在Perl中使用三种类型的变量。scalar变量将以美元符号($)开头,它可以存储数字,字符串或引用。array变量将以符号@开头,它将存储有序的标量列表。 最后,Hash变量将以符号%开头,并将用于存储键/值对的集合。 Perl将每个变量类型保存在单独的命名空间中。 因此,您可以在不担心冲突的情况下,为标量变量,数组...
#!/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(@...
# forget @ARRAY ever existed The EXPR can be arbitrarily complicated provided its final operation is an element or slice of an aggregate: delete $ref->[$x][$y]{$key}; delete @{$ref->[$x][$y]}{$key1, $key2, @morekeys}; delete $ref->[$x][$y][$index]; delete @{$ref->...