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62 lines
2.0 KiB
62 lines
2.0 KiB
// //Exercise in Array
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// Exercise Level 1
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/**
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*
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* ## 💻 Exercise
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### Exercise: Level 1
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```js
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const countries = [
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'Albania',
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'Bolivia',
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'Canada',
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'Denmark',
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'Ethiopia',
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'Finland',
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'Germany',
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'Hungary',
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'Ireland',
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'Japan',
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'Kenya'
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]
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const webTechs = [
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'HTML',
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'CSS',
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'JavaScript',
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'React',
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'Redux',
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'Node',
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'MongoDB'
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]
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```
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1. Declare an _empty_ array;
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2. Declare an array with more than 5 number of elements
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3. Find the length of your array
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4. Get the first item, the middle item and the last item of the array
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5. Declare an array called _mixedDataTypes_, put different data types in the array and find the length of the array. The array size should be greater than 5
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6. Declare an array variable name itCompanies and assign initial values Facebook, Google, Microsoft, Apple, IBM, Oracle and Amazon
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7. Print the array using _console.log()_
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8. Print the number of companies in the array
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9. Print the first company, middle and last company
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10. Print out each company
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11. Change each company name to uppercase one by one and print them out
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12. Print the array like as a sentence: Facebook, Google, Microsoft, Apple, IBM,Oracle and Amazon are big IT companies.
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13. Check if a certain company exists in the itCompanies array. If it exist return the company else return a company is _not found_
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14. Filter out companies which have more than one 'o' without the filter method
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15. Sort the array using _sort()_ method
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16. Reverse the array using _reverse()_ method
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17. Slice out the first 3 companies from the array
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18. Slice out the last 3 companies from the array
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19. Slice out the middle IT company or companies from the array
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20. Remove the first IT company from the array
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21. Remove the middle IT company or companies from the array
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22. Remove the last IT company from the array
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23. Remove all IT companies
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*/
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let myArr = Array(); //Empty array
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const animals = ['lion','dog','cat','pig','monkey'];
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const myArrayLength = animals.length();
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console.log(myArrayLength) |