ForNext
Only Do What Only You Can Do
110. indexed iteration
Hyperpolyglot Interpreted Languages: PHP, Perl, Python, Ruby より (2012.05.08)
VBScript
JScript
Perl
none; use range iteration from 0 to $#a and use index to look up value in the loop body
PHP
$a = array("do", "re", "mi" "fa");
foreach ($a as $i => $s) {
echo "$s at index $i\n";
}
Python
a = ['do', 're', 'mi', 'fa']
for i, s in enumerate(a):
print('%s at index %d' % (s, i))
Ruby
a = %w(do re mi fa)
a.each_with_index do |s,i|
puts "#{s} at index #{i}"
end