multidimensional-array

问题 I have two arrays, both will always be the same count length. One has doubles mixed with integers, the second has textual (string only) values. They do correlate so I need them both to stay in order. Sorry no keys to work with (by design). I need to sum the values where I have duplicates in the array that has strings. Example $dataLabelGraph = array(3, 8, 1, 4.85, 1, 0.5, 6.01, 7); $dataCalcGraph = array("Coding", "Web development - Coding", "Meeting", "Coding", "Coding", "Content", "Coding",

问题 I want to pass a 2d array i defined using malloc to a function. First i define the array using code from a blog post. int** Make2DIntArray(int arraySizeX, int arraySizeY) { int** theArray; theArray = (int**) malloc(arraySizeX*sizeof(int*)); for (int i = 0; i < arraySizeX; i++) theArray[i] = (int*) malloc(arraySizeY*sizeof(int)); return theArray; } int main(){ int** myArray = Make2DIntArray(nx, ny); } I can then use it as myArray[i][j]. After that,i want to pass this array to a function.I

问题 I need to build a method in Java where the input is a 2D array of integers and get as a result a 2D array of integers where each element makes reference to a position of an element in a column. Let me explain that with an example. Consider as an input for the method a 2D arrays of 5x5 as follow: int[][] array = new int[][]{ {124, 188, 24, 254, 339}, {0, 7, 77, 145, 159}, {206, 340, 280, 523, 433}, {310, 265, 151, 411, 398}, {24, 104, 0, 183, 198}}; Now I need to build a new 2D array of

问题 I need to build a method in Java where the input is a 2D array of integers and get as a result a 2D array of integers where each element makes reference to a position of an element in a column. Let me explain that with an example. Consider as an input for the method a 2D arrays of 5x5 as follow: int[][] array = new int[][]{ {124, 188, 24, 254, 339}, {0, 7, 77, 145, 159}, {206, 340, 280, 523, 433}, {310, 265, 151, 411, 398}, {24, 104, 0, 183, 198}}; Now I need to build a new 2D array of

问题 If I create a 2D int array in Java, and then make a copy of it using Arrays.copyOf() , like so - jshell> int[][] c1 = {{1,2}, {3,4}} c1 ==> int[2][] { int[2] { 1, 2 }, int[2] { 3, 4 } } jshell> int[][] d1 = Arrays.copyOf(c1, c1.length) d1 ==> int[2][] { int[2] { 1, 2 }, int[2] { 3, 4 } } If I then change an element in the copy, why does the corresponding cell in the original 2D array get mutated in the process? jshell> d1[0][0] = 0 $21 ==> 0 jshell> d1 d1 ==> int[2][] { int[2] { 0, 2 }, int[2

问题 just a simple problem here. I have the following array: Array(21) { [0] => Array(7) { ["punti"] => Integer 418 ["vittorie"] => Integer 9 ["podi"] => Integer 18 ["gv"] => Integer 14 ["id_pilota"] => Integer 1 ["team"] => String(15) "Red Bull Racing" ["naz"] => String(2) "it" } [1] => Array(7) { ["punti"] => Integer 353 ["vittorie"] => Integer 6 ["podi"] => Integer 16 ["gv"] => Integer 3 ["id_pilota"] => Integer 19 ["team"] => String(16) "Scuderia Ferrari" ["naz"] => String(2) "it" } [2] =>

问题 I have a mongo collection that looks like this db.users.find().pretty() { "_id" : ObjectId("57c3d5b3d364e624b4470dfb"), "fullname" : "tim", "username" : "tim", "email" : "tim@gmail.com", "password" : "$2a$10$.Z9CnK4oKrC/CujDKxT6YutohQkHbAANUoAHTXQp.73KfYWrm5dY2", "workout" : [ { "workoutId" : "Bkb6HIWs", "workoutname" : "chest day", "BodyTarget" : "Chest", "date" : "Monday, August 29th, 2016, 2:27:04 AM", "exercises" : [ { "exerciseId" : "Bym88LZi", "exercise" : "bench press", "date" :

问题 When I create a nested array, say: let x = [[0, 1], 2, [3, [4, 5]]]; and convert it to a string with .toString(): x.toString(); -> "0,1,2,3,4,5" It doesn't preserve the nested structure of the array. I would like to get something like: x.toString(); -> "[0,1],2,[3,[4,5]]" Is there any smarter way of doing this other than looping through elements of x, testing if an element is an array etc.? 回答1: You can use JSON.stringify and replace ^\[|\]$ let x = [[0, 1], 2, [3, [4, 5]]]; let final = JSON

问题 So I have homework that asked me to: Write a method that takes two parameters: an array of integers and an integer that represents a number of elements. It should return a two-dimensional array that results from dividing the passed one-dimensional array into rows that contain the required number of elements. Note that the last row may have less number of elements if the length of the array is not divisible by the required number of elements. For example, if the array {1,2,3,4,5,6,7,8,9} and

问题 So I have homework that asked me to: Write a method that takes two parameters: an array of integers and an integer that represents a number of elements. It should return a two-dimensional array that results from dividing the passed one-dimensional array into rows that contain the required number of elements. Note that the last row may have less number of elements if the length of the array is not divisible by the required number of elements. For example, if the array {1,2,3,4,5,6,7,8,9} and