Created
January 29, 2018 19:16
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Breakout about higher order functions
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| const ancestry = [ | |
| {"name": "Emma de Milliano", "sex": "f", | |
| "born": 1876, "died": 1956, | |
| "father": "Petrus de Milliano", | |
| "mother": "Sophia van Damme"}, | |
| {"name": "Carolus Haverbeke", "sex": "m", | |
| "born": 1832, "died": 1905, | |
| "father": "Carel Haverbeke", | |
| "mother": "Maria van Brussel"}, | |
| {"name": "Marcus Pillus", "sex": "m", | |
| "born": 1901, "died": 1905, | |
| "father": "Carel Haverbeke", | |
| "mother": "Maria van Brussel"} | |
| ] | |
| function filter(array, test ) { | |
| const filteredArray = [] | |
| for (let element of array) { | |
| // element contains each object one at a time | |
| if (test(element)) { | |
| // if (element.born > 1900 && element.born < 1925) { | |
| filteredArray.push(element); | |
| } | |
| } | |
| return filteredArray; | |
| } | |
| function map(array, transform) { | |
| // const transform = function(inputObj) { return inputObj.name}; | |
| const mappedArray = []; | |
| for (let element of array) { | |
| mappedArray.push( transform(element) ); | |
| } | |
| return mappedArray; | |
| } | |
| const over50 = filter(ancestry, function(inputObj){ | |
| return inputObj.died - inputObj.born > 50; | |
| }) | |
| console.log(map(over50, function(inputObj) { return inputObj.name} )); | |
| // ouput the names of the persons over 90 | |
| // ["Clara Aernoudts", "Emile Haverbeke", | |
| // "Maria Haverbeke"] |
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