6. 함수형 프로그래밍 - pipe
function reduce( $list, $fn, $memo ) { let memo = $memo; each( $list, ( $item ) => memo = $fn( memo, $item )); return memo; } function each( $list, $fn ){ for( let item of $list ){ $fn( item ); } } function pipe() { let fns = arguments; return ( arg ) => reduce( fns, ( arg, fn ) => fn( arg ), arg ); } let f1 = pipe( ( a ) => a + 1, ( a ) => a + 2, ( a ) => a * a ); console.log( f1( 1 )); console..
5. 함수형 프로그래밍 - reduce
function reduce( $list, $fn, $memo ) { let memo = $memo; each( $list, ( $item ) => memo = $fn( memo, $item )); return memo; } function each( $list, $fn ){ for( let item of $list ){ $fn( item ); } } const add = ( a, b ) => a + b; const minus = ( a, b ) => a - b; console.log( reduce([ 1, 2, 3 ], add, 0 )); console.log( reduce([ 1, 2, 3 ], minus, 6 ));
4. 함수형 프로그래밍 - each
const users = [ { isView : false, id : 1, name : "A", age : 36 }, { isView : true, id : 2, name : "B", age : 32 }, { isView : true, id : 3, name : "C", age : 31 }, { isView : false, id : 4, name : "D", age : 27 }, { isView : true, id : 5, name : "E", age : 25 }, { isView : false, id : 6, name : "F", age : 31 } ]; function filter( $list, fn ){ let nList = []; each( $list, ( $item ) => { if( fn( $..
3. 함수형 프로그래밍 - filter + map
const users = [ { isView : false, id : 1, name : "A", age : 36 }, { isView : true, id : 2, name : "B", age : 32 }, { isView : true, id : 3, name : "C", age : 31 }, { isView : false, id : 4, name : "D", age : 27 }, { isView : true, id : 5, name : "E", age : 25 }, { isView : false, id : 6, name : "F", age : 31 } ]; function filter( $list, fn ){ let nList = []; let item; for( item of $list ){ if( f..
2. 함수형 프로그래밍 - map
const users = [ { isView : false, id : 1, name : "A", age : 36 }, { isView : true, id : 2, name : "B", age : 32 }, { isView : true, id : 3, name : "C", age : 31 }, { isView : false, id : 4, name : "D", age : 27 }, { isView : true, id : 5, name : "E", age : 25 }, { isView : false, id : 6, name : "F", age : 31 } ]; function map( $list, fn ){ let nList = []; let item; for( item of $list ){ nList.pu..
1. 함수형 프로그래밍 - Filter
const users = [ { isView : false, id : 1, name : "A", age : 36 }, { isView : true, id : 2, name : "B", age : 32 }, { isView : true, id : 3, name : "C", age : 31 }, { isView : false, id : 4, name : "D", age : 27 }, { isView : true, id : 5, name : "E", age : 25 }, { isView : false, id : 6, name : "F", age : 31 } ]; function filter( $list, fn ){ let nList = []; let item; for( item of $list ){ if( f..
