In your example, it is because you can’t have a List of a primitive type. In other words, List<int> is not possible. You can, however, have a List<Integer> using the Integer class that wraps the int primitive. Convert your array to a List with the Arrays.asList utility method. See this code run live at IdeOne.com.
Since Java 5 you can use Arrays.toString(arr) or Arrays.deepToString(arr) for arrays within arrays. Note that the Object[] version calls .toString() on each object in the array. The output is even decorated in the exact way you’re asking. Examples: Simple Array: String[] array = new String[] {“John”, “Mary”, “Bob”}; System.out.println(Arrays.toString(array)); Output: [John, Mary, Bob] Nested Array: … Read more
Preliminaries JavaScript has only one data type which can contain multiple values: Object. An Array is a special form of object. (Plain) Objects have the form Arrays have the form Both arrays and objects expose a key -> value structure. Keys in an array must be numeric, whereas any string can be used as key … Read more
but as for this method, I don’t understand the purpose of Integer.MAX_VALUE and Integer.MIN_VALUE. By starting out with smallest set to Integer.MAX_VALUE and largest set to Integer.MIN_VALUE, they don’t have to worry later about the special case where smallest and largest don’t have a value yet. If the data I’m looking through has a 10 … Read more
I’m currently working on a card game, and I’m having trouble with some initialization code: The trouble is that my compiler’s telling me that cards++ is not an l-value. I’ve read up on the whole pointer-array equivalence thing, and I thought I understood it, but alas, I can’t get it to work. My understanding is … Read more
Use the find() method: From MDN: The find() method returns the first value in the array, if an element in the array satisfies the provided testing function. Otherwise undefined is returned. If you want to find its index instead, use findIndex(): From MDN: The findIndex() method returns the index of the first element in the … Read more
Find the index of the array element you want to remove using indexOf, and then remove that index with splice. The splice() method changes the contents of an array by removing existing elements and/or adding new elements. Expand snippet The second parameter of splice is the number of elements to remove. Note that splice modifies … Read more
Since Java 5 you can use Arrays.toString(arr) or Arrays.deepToString(arr) for arrays within arrays. Note that the Object[] version calls .toString() on each object in the array. The output is even decorated in the exact way you’re asking. Examples: Simple Array:String[] array = new String[] {“John”, “Mary”, “Bob”}; System.out.println(Arrays.toString(array)); Output:[John, Mary, Bob] Nested Array:String[][] deepArray = new String[][] {{“John”, “Mary”}, {“Alice”, “Bob”}}; System.out.println(Arrays.toString(deepArray)); //output: … Read more
Use implode
Loops are also very useful to learn about, esp When using arrays,