Arrays

Javascript array

//create an array like so:
var colors = ["red","blue","green"];

//you can loop through an array like this:
for (var i = 0; i < colors.length; i++) {
    console.log(colors[i]);
}

160

Arrays

int[] numbers = new int[10];

int[] names = new String[]{"John", "Jack"};

int length = names.length;

for (String name: names) {
    System.out.println(name);
}

Source: github.com

Arrays

itemp:integer

Arrays

arrays

Arrays

// splice() returns NEW array !!!let array = ['today', 'was', 'not', 'so', 'great'];array.splice(2, 2); //['today', 'was', 'great']//*************************************************************************'*/let array = ['I', 'am', 'feeling', 'really', 'happy'];let newArray = array.splice(3, 2); // newArray has the value ['really', 'happy']//*************************************************************************'*/// Add items with splice()const numbers = [10, 11, 12, 12, 15];const startIndex = 3;const amountToDelete = 1;numbers.splice(startIndex, amountToDelete, 13, 14);console.log(numbers);// The second entry of 12 is removed, and we add 13 and 14 at the same index.// The numbers array would now be [ 10, 11, 12, 13, 14, 15 ]//*************************************************************************'*/// Copying array items with splice()let weatherConditions = ['rain', 'snow', 'sleet', 'hail', 'clear'];let todaysWeather = weatherConditions.slice(1, 3);//todaysWeather would have the value ['snow', 'sleet'], while weatherConditions//would still have ['rain', 'snow', 'sleet', 'hail', 'clear'].//In effect, we have created a new array by extracting elements from an existing array.//*************************************************************************'*/// slice() return NEW array  (NOTICE slice()!!! )let weatherConditions = ['rain', 'snow', 'sleet', 'hail', 'clear'];let todaysWeather = weatherConditions.slice(1, 3);//todaysWeather would have the value ['snow', 'sleet'], while weatherConditions//would still have ['rain', 'snow', 'sleet', 'hail', 'clear'].//*************************************************************************'*/// Combine arrays
 with spreadlet thisArray = ['sage', 'rosemary', 'parsley', 'thyme'];let thatArray = ['basil', 'cilantro', ...thisArray, 'coriander'];// thatArray would have the value ['basil', 'cilantro', 'sage', 'rosemary', 'parsley', 'thyme', 'coriander']//*************************************************************************'*/// indexOf()let fruits = ['apples', 'pears', 'oranges', 'peaches', 'pears'];fruits.indexOf('dates');fruits.indexOf('oranges');fruits.indexOf('pears');// indexOf('dates') returns -1, indexOf('oranges') returns 2, and// indexOf('pears') returns 1 (the first index at which each element exists).//*************************************************************************'*/function filteredArray(arr, elem) { let newArr = []; for (let i = 0; i < arr.length; i++) {  // if elem is NOT in the array... push arr to the newArr  if (arr[i].indexOf(elem) === -1) newArr.push(arr[i]); } return newArr;}console.log( filteredArray(  [   [3, 2, 3],   [1, 6, 3],   [3, 13, 26],   [19, 3, 9],  ],  3 // <------------------------ ));

ARRAYS

ia = np.array([[0, 0], [2, 2]])
ja = np.array([[0, 0], [3, 3]])
ka = np.array([[0, 3], [0, 3]])

Source: scipython.com

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