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Update array.js #7

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Update array.js #7

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40 changes: 34 additions & 6 deletions src/array.js
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Original file line number Diff line number Diff line change
Expand Up @@ -11,7 +11,10 @@
* [0, 1, 2, 3, 4, 5], 5 => 5
*/
function findElement(arr, value) {
throw new Error("Not implemented");
for (var i = 0; i<arr.length; i++)
if (value == arr[i])
return i;
return -1;
}

/**
Expand All @@ -27,7 +30,11 @@ function findElement(arr, value) {
* [] => []
*/
function doubleArray(arr) {
throw new Error("Not implemented");
var newArr = [];
for (var i = 1; i<3; i++)
for (var j = 0; j<arr.length; j++)
newArr[i*arr.length+j] = arr[j];
return newArr;
}

/**
Expand All @@ -42,7 +49,13 @@ function doubleArray(arr) {
* [] => []
*/
function getArrayOfPositives(arr) {
throw new Error("Not implemented");
var newArr = [];
var count = 0;
arr.forEach(element => {
if (element>0)
newArr[count++] = element;
});
return newArr;
}

/**
Expand All @@ -59,7 +72,13 @@ function getArrayOfPositives(arr) {
* [ false, 0, NaN, '', undefined ] => [ ]
*/
function removeFalsyValues(arr) {
throw new Error("Not implemented");
var newArr = [];
var count = 0;
arr.forEach(element => {
if (element == true || element.length != 0)
newArr[count++] = element;
})
return newArr;
}

/**
Expand All @@ -73,7 +92,12 @@ function removeFalsyValues(arr) {
* [ 'angular', 'react', 'ember' ] => [ 7, 5, 5 ]
*/
function getStringsLength(arr) {
throw new Error("Not implemented");
var newArr = [];
var count = 0;
arr.forEach(element => {
newArr[count++] = element.length;
})
return newArr;
}

/**
Expand All @@ -89,7 +113,11 @@ function getStringsLength(arr) {
* [ 1, 10, 100, 1000 ] => 1111
*/
function getItemsSum(arr) {
throw new Error("Not implemented");
var sum = 0;
arr.forEach(element => {
sum += element;
})
return sum;
}

module.exports = {
Expand Down