За създателите на библиотеки и конструкторите на рамки може да им бъде от полза наличието на няколко допълнителни функции за динамично прилагане на функции към елементи от списък. Ето 4 функции, вдъхновени от еквиваленти на JavaScript и PHP, внедрени в Sass.
разходка()
Най- walk()функцията се прилага дадена функция към всеки елемент от списъка.
/// Apply `$function` with `$args` to each item from `$list`. /// @author Hugo Giraudel /// @param (List) $list - List of items /// @param (String) $function - Function to apply to every item from `$list` /// @param (Arglist) $args - Extra arguments to pass to `$function` /// @return (List) /// @throw There is no `#($function)` function. @function walk($list, $function, $args… ) ( @if not function-exists($function) ( @error "There is no `#($function)` function."; ) @for $i from 1 through length($list) ( $list: set-nth($list, $i, call($function, nth($list, $i), $args… )); ) @return $list; )Употреба
walk ( walk: walk(red green blue, invert); walk: walk(red green blue, lighten, 20%); walk: walk(2 4 6 8 10, sqrt); )walk ( walk: cyan #ff7fff yellow; walk: #ff6666 #00e600 #6666ff; walk: 1.41421 2 2.44949 2.82843 3.16228; )някои ()
На some()връща функция дали някои елементи от тест списък пас дал (като функция).
/// Return whether some items from `$list` passed `$function` test. /// @author Hugo Giraudel /// @param (List) $list - List of items /// @param (String) $function - Function to run on every item from `$list` /// @param (Arglist) $args - Extra arguments to pass to `$function` /// @return (Boolean) /// @throw There is no `#($function)` function. @function some($list, $function, $args… ) ( @if not function-exists($function) ( @error "There is no `#($function)` function."; ) @each $item in $list ( @if call($function, $item, $args… ) ( @return true; ) ) @return false; )Употреба
some ( some: some(round ceil floor, function-exists); some: some(round ceil unknown, function-exists); some: some(completely unknown function, function-exists); some: some(4px 10px 20px, comparable, 42px); some: some(4px 10% 20px, comparable, 42%); some: some(4px 10px 20px, comparable, 42%); )some ( some: true; some: true; some: false; some: true; some: true; some: false; )всеки ()
На every()връща функция дали всеки елементи от тест списък пас дал (като функция).
/// Return whether all items from `$list` passed `$function` test. /// @author Hugo Giraudel /// @param (List) $list - List of items /// @param (String) $function - Function to run on every item from `$list` /// @param (Arglist) $args - Extra arguments to pass to `$function` /// @return (Boolean) /// @throw There is no `#($function)` function. @function every($list, $function, $args… ) ( @if not function-exists($function) ( @error "There is no `#($function)` function."; ) @each $item in $list ( @if not call($function, $item, $args… ) ( @return false; ) ) @return true; )Употреба
every ( every: every(round ceil floor, function-exists); every: every(round ceil unknown, function-exists); every: every(completely unknown function, function-exists); every: every(4px 10px 20px, comparable, 42px); every: every(4px 10% 20px, comparable, 42%); every: every(4px 10px 20px, comparable, 42%); )every ( every: true; every: false; every: false; every: true; every: false; every: false; )функции-разходка ()
Най functions-walk()функцията връща списък, направен от резултата от всяко извикване на функция.
/// Return a list made of the result of each function call from `$functions` with `$args`. /// @author Hugo Giraudel /// @param (List) $functions - List of functions to call /// @param (Arglist) $args - Extra arguments to pass to each function in `$functions` /// @return (List) /// @throw There is no `#($function)` function. @function functions-walk($functions, $args… ) ( $list: (); @each $function in $functions ( @if not function-exists($function) ( @error "There is no `#($function)` function."; ) $list: append($list, call($function, $args… )); ) @return $list; )Употреба
functions-walk ( functions-walk: functions-walk('red' 'blue' 'green', #BADA55); functions-walk: functions-walk('round' 'ceil' 'floor', 3.1415279); )functions-walk ( functions-walk: 186 85 218; functions-walk: 3 4 3; )