11<!DOCTYPE html>
22< html lang ="en ">
3+
34< head >
45 < meta charset ="UTF-8 ">
56 < title > Array Cardio 💪</ title >
67</ head >
8+
79< body >
810 < script >
911 // Get your shorts on - this is an array workout!
2729
2830 // Array.prototype.filter()
2931 // 1. Filter the list of inventors for those who were born in the 1500's
32+ const inventors_from_1500s = inventors . filter ( ( inventor ) => inventor . year >= 1500 && inventor . year < 1600 )
33+ console . table ( inventors_from_1500s )
3034
3135 // Array.prototype.map()
32- // 2. Give us an array of the inventory first and last names
36+ // 2. Give us an array of the inventors first and last names
37+ const inventors_full_name = inventors . map ( ( inventor ) => `${ inventor . first } ${ inventor . last } )
38+ console . table ( inventors_full_name )
3339
3440 // Array.prototype.sort()
3541 // 3. Sort the inventors by birthdate, oldest to youngest
42+ const inventors_by_date = inventors . sort ( ( a , b ) => a . year - b . year )
43+ console . table ( inventors_by_date )
3644
3745 // Array.prototype.reduce()
3846 // 4. How many years did all the inventors live?
39-
47+ const total_years_lived = inventors . reduce ( ( currValue , inventor ) => currValue += ( inventor . passed - inventor . year ) , 0 )
48+ console . log ( total_years_lived ) ;
4049 // 5. Sort the inventors by years lived
50+ const inventors_by_lifespan = inventors . sort ( ( a , b ) => ( a . passed - a . year ) - ( b . passed - b . year ) ) ;
51+ console . table ( inventors_by_lifespan ) ;
4152
4253 // 6. create a list of Boulevards in Paris that contain 'de' anywhere in the name
4354 // https://en.wikipedia.org/wiki/Category:Boulevards_in_Paris
44-
55+ /*
56+ This code will be run directly from the browser console
57+ after navigating to the Wikipedia link above.
58+
59+ const blvd_with_de = Array.from(document.querySelectorAll('.mw-category a'))
60+ .map(link => link.textContent)
61+ .filter((blvd) => blvd.includes('de'))
62+ */
4563
4664 // 7. sort Exercise
4765 // Sort the people alphabetically by last name
66+ const people_by_last_name = people . sort (
67+ ( a , b ) => a . split ( ', ' ) [ 0 ] > b . split ( ', ' ) [ 0 ] ? - 1 : 1 ) ;
4868
69+ console . table ( people_by_last_name ) ;
4970 // 8. Reduce Exercise
5071 // Sum up the instances of each of these
51- const data = [ 'car' , 'car' , 'truck' , 'truck' , 'bike' , 'walk' , 'car' , 'van' , 'bike' , 'walk' , 'car' , 'van' , 'car' , 'truck' ] ;
72+ const data = [ 'car' , 'car' , 'truck' , 'truck' , 'bike' , 'walk' , 'car' , 'van' , 'bike' , 'walk' , 'car' , 'van' , 'car' , 'truck' ] ;
73+
74+ const data_instance_count = data . reduce ( ( tallyObject , item ) => {
75+ if ( ! tallyObject [ item ] ) {
76+ tallyObject [ item ] = 0 ;
77+ }
78+ tallyObject [ item ] ++ ;
79+ return tallyObject ;
80+ } , { } ) ;
81+
82+ console . table ( data_instance_count ) ;
5283
5384 </ script >
5485</ body >
55- </ html >
86+
87+ </ html >
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