How To Get The Number Of Elements In An Array With Lua? [Solved]

Answer (1 of 2): You can easily do #(array). You can easily do #(array).

The Lua # operator only counts entries with integer keys, and so does table.getn: tbl = {} tbl["test"] = 47 tbl[1] = 48 print(#tbl, table.

How can I find out the number of items containing an array in a LUA file? I would like to be able to turn it to an integer from C++.

array = {"Lua", "Tutorial"} for i = 0, 2 do print(array[i]) end When we run the above code, we wil get the following output. nil Lua Tutorial As you can see in the above code, when we are trying to access an element in an index that is not there in the array, it returns nil. In Lua, indexing generally starts at index 1. But it is possible to create objects at index 0 and below 0 as well.

The task is to count number of elements occurs between the given points (excluding num1 and num2). If there are multiple occurrences of num1 and num2, we need to consider leftmost occurrence of num1 and rightmost occurrence of num2.

For example: local arr1, arr2, arr3 = {2, 7, -9, 0, 27, 36, 16}, {0,1}, {5,6,7} The unpack function (in some versions of Lua it's inside table.unpack instead) transforms an array-like table into a list of values. local x,y,z = unpack ( {1,2,3}) print (x) -- 1.

function max (t, fn) if #t == 0 then return nil, nil end local key, value = 1, t [1] for i = 2, #t do if fn (value, t [i]) then key, value = i, t [i] end end return key, value end. Which is used like this: print (max ( {1,2,3,4,1,2,37,1,0}, function (a,b) return a < b end)) --> 7 37. Share. Improve this answer.

However, there are in fact 10 elements in this 2D array. In the case of multi-dimensional arrays, len() gives you the length of the first dimension of the array i.e. import numpy as np len(a) == np.shape(a)[0] To get the number of elements in a multi-dimensional array of arbitrary shape: import numpy as np size = 1 for dim in np.

Well, We can use count for non-zero elements in the array,The Code is Below:: public class SomeElementOfArrayUsingCount{ public static void main(String[] args){ double total;//The sum of non-zero numbers in the Array. total=0; double average;//The average of non-zero numbers. int i; double count;//The number of non-zero numbers. count = 0; int[] list; list = new int[5];//make a container of 5. list[0]=2; list[1]=4; list[2]=4; list[3]=5; list[4]=2; for(i=0;i