Ruby Hash with duplicate keys?

Two ways of achieving duplicate keys in a hash: h1 = {} h1.compare_by_identity h1[“a”] = 1 h1[“a”] = 2 p h1 # => {“a”=>1, “a”=>2} h2 = {} a1 = [1,2,3] a2 = [1,2] h2[a1] = 1 h2[a2] = 2 a2 << 3 p h2 # => {[1, 2, 3]=>1, [1, 2, 3]=>2}

Why must dictionary keys be immutable?

On my computer, there’s a file /etc/dictionaries-common/words containing a large collection of English words: >>> with open(“/etc/dictionaries-common/words”) as f: … words = [line.strip() for line in f] … >>> “python” in words True >>> “BDFL” in words False Let’s create a dictionary storing the lengths of all those words: >>> word_lengths = {w: len(w) for … Read more

Get the keys for duplicate values in an array

function get_keys_for_duplicate_values($my_arr, $clean = false) { if ($clean) { return array_unique($my_arr); } $dups = $new_arr = array(); foreach ($my_arr as $key => $val) { if (!isset($new_arr[$val])) { $new_arr[$val] = $key; } else { if (isset($dups[$val])) { $dups[$val][] = $key; } else { $dups[$val] = array($key); // Comment out the previous line, and uncomment the following … Read more

Simulating Key Press event using Python for Linux

Have a look at this https://github.com/SavinaRoja/PyUserInput its cross-platform control for mouse and keyboard in python Keyboard control works on X11(linux) and Windows systems. But no mac support(when i wrote this answer). from pykeyboard import PyKeyboard k = PyKeyboard() # To Create an Alt+Tab combo k.press_key(k.alt_key) k.tap_key(k.tab_key) k.release_key(k.alt_key)