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BER Katarzyna Roszak #124

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3 changes: 3 additions & 0 deletions package-lock.json
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320 changes: 320 additions & 0 deletions starter-code/package-lock.json
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46 changes: 32 additions & 14 deletions starter-code/src/array-functions.js
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Original file line number Diff line number Diff line change
@@ -1,33 +1,51 @@
var ArrayFunctions = function (){}
// var ArrayFunctions = function() {};

// 1) Define a function that takes an array with numbers and prints all the elements of the array, separated by " --- "
// ArrayFunctions.printSpecial([12, 33, 144, 122])
// 12 -- 33 -- 144 -- 122

ArrayFunctions.prototype.printSpecial = function (array) {
return array.join(" --- ");
};
// ArrayFunctions.prototype.printSpecial = function (array) {
// return array.join(" --- ");
// };

class ArrayFunctions {
printSpecial(array) {
return array.join(' --- ');
}

doubleArray(array) {
return array.map(number => {
return number * 2;
});
}

superPower(array) {
return array.reduce((sum, number, index) => {
return sum + number * Math.pow(10, index);
});
}
}

// 2) Define a function that takes an array with numbers and returns another array where each element contains double each element in the array
// ArrayFunctions.doubleMyArray([10, 20, 35, 12])
// [20, 40, 70, 24]

ArrayFunctions.prototype.doubleArray = function(array){
return array.map(function(number){
return number * 2;
});
};
// ArrayFunctions.prototype.doubleArray = function(array) {
// return array.map(function(number) {
// return number * 2;
// });
// };

// 3) Define a function that takes an array with numbers and returns the result of multiplying each element by ten to the power of the position it's in:
// ArrayFunctions.superPower([1,2,3,4,5])
// 54321
// explanation: (1 x 10^0) + (2 x 10^1) + (3 x 10^2) + (4 x 10^3) + (5 x 10^4)
// explanation: (1) + (20) + (300) + (4000) + (50000)

ArrayFunctions.prototype.superPower = function(array){
return array.reduce(function(sum, number, index){
return sum + (number * (Math.pow(10, index)));
});
}
// ArrayFunctions.prototype.superPower = function(array) {
// return array.reduce(function(sum, number, index) {
// return sum + number * Math.pow(10, index);
// });
// };

module.exports = ArrayFunctions;
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