If you’re using ruby 1.8.7 or 1.9, you can use the fact that iterator methods like each_with_index, when called without a block, return an Enumerator object, which you can call Enumerable methods like map on. So you can do: arr.each_with_index.map { |x,i| [x, i+2] } In 1.8.6 you can do: require ‘enumerator’ arr.enum_for(:each_with_index).map { |x,i| … Read more
int* arr[8]; // An array of int pointers. int (*arr)[8]; // A pointer to an array of integers The third one is same as the first. The general rule is operator precedence. It can get even much more complex as function pointers come into the picture.
One is an array of arrays, and one is a 2d array. The former can be jagged, the latter is uniform. That is, a double[][] can validly be: double[][] x = new double[5][]; x[0] = new double[10]; x[1] = new double[5]; x[2] = new double[3]; x[3] = new double[100]; x[4] = new double[1]; Because each … Read more
You just need to add [FromUri] before parameter, looks like: GetCategories([FromUri] int[] categoryIds) And send request: /Categories?categoryids=1&categoryids=2&categoryids=3
if (typeof image_array !== ‘undefined’ && image_array.length > 0) { // the array is defined and has at least one element } Your problem may be happening due to a mix of implicit global variables and variable hoisting. Make sure you use var whenever declaring a variable: <?php echo “var image_array = “.json_encode($images);?> // add … Read more
Arrays on the type level An array type is denoted as T[n] where T is the element type and n is a positive size, the number of elements in the array. The array type is a product type of the element type and the size. If one or both of those ingredients differ, you get … Read more
Here’s what I figured out: Submitting multi-value form fields, i.e. submitting arrays through GET/POST vars, can be done several different ways, as a standard is not necessarily spelled out. Three possible ways to send multi-value fields or arrays would be: ?cars[]=Saab&cars[]=Audi (Best way- PHP reads this into an array) ?cars=Saab&cars=Audi (Bad way- PHP will only … Read more
var index = items.indexOf(3452); if (index !== -1) { items[index] = 1010; } Also it is recommend you not use the constructor method to initialize your arrays. Instead, use the literal syntax: var items = [523, 3452, 334, 31, 5346]; You can also use the ~ operator if you are into terse JavaScript and want … Read more
As swift is in some regards more functional than object-oriented (and Arrays are structs, not objects), use the function “find” to operate on the array, which returns an optional value, so be prepared to handle a nil value: let arr:Array = [“a”,”b”,”c”] find(arr, “c”)! // 2 find(arr, “d”) // nil Use firstIndex and lastIndex – … Read more
A 100% pure Bash function that supports multi-character delimiters is: function join_by { local d=${1-} f=${2-} if shift 2; then printf %s “$f” “${@/#/$d}” fi } For example, join_by , a b c #a,b,c join_by ‘ , ‘ a b c #a , b , c join_by ‘)|(‘ a b c #a)|(b)|(c join_by ‘ %s … Read more