Fonksiyonel Programlama Fonksiyonları - CSS Hileleri

Anonim

Kütüphane oluşturucular ve çerçeve oluşturucular için, işlevleri bir listedeki öğelere dinamik olarak uygulamak için birkaç ekstra işleve sahip olmak kullanışlı olabilir. İşte JavaScript ve PHP eşdeğerlerinden esinlenen, Sass'ta uygulanan 4 işlev.

yürümek ()

walk()İşlevi, bir listenin her öğeye verilen fonksiyon uygular.

/// 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; )

Kullanım

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; )

biraz()

some()İşlev, bir listedeki bazı öğelerin verilen testi geçip geçmediğini ( işlev olarak) döndürür.

/// 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; )

Kullanım

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; )

her()

every()İşlev, bir listedeki her öğenin verilen testi geçip geçmediğini ( işlev olarak) döndürür.

/// 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; )

Kullanım

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; )

functions-walk ()

functions-walk()Fonksiyon her işlev çağrısının sonucu yapılmış bir listesini döndürür.

/// 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; )

Kullanım

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; )