The same as in JavaScript, using Array.prototype.indexOf(): Or using ECMAScript 2016 Array.prototype.includes(): Note that you could also use methods like showed by @Nitzan to find a string. However you wouldn’t usually do that for a string array, but rather for an array of objects. There those methods were more sensible. For example Reference Array.find() Array.some() Array.filter()
Firstly, you can’t do new List(); it is an interface. To make a list of int Arrays, do something like this : P.S. As per the comment, package for List is java.util.List and for ArrayList java.util.ArrayList
There is a (somewhat) related question on StackOverflow: Showing an image with pylab.imshow() Here the problem was that an array of shape (nx,ny,1) is still considered a 3D array, and must be squeezed or sliced into a 2D array. More generally, the reason for the Exception TypeError: Invalid dimensions for image data is shown here: matplotlib.pyplot.imshow() needs a … Read more
You can’t resize an array in Java. You’d need to either: Create a new array of the desired size, and copy the contents from the original array to the new array, using java.lang.System.arraycopy(…); Use the java.util.ArrayList<T> class, which does this for you when you need to make the array bigger. It nicely encapsulates what you describe in your … Read more
I personally don’t like atoi function. I would suggest sscanf: It’s very standard, it’s in the stdio.h library 🙂 And in my opinion, it allows you much more freedom than atoi, arbitrary formatting of your number-string, and probably also allows for non-number characters at the end. EDIT I just found this wonderful question here on the site that explains and compares 3 different ways … Read more
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: In 1.8.6 you can do:
[…] How should Java Comparator class be declared to sort the arrays by their first elements in decreasing order […] Here’s a complete example using Java 8: Output: For Java 7 you can do: If you unfortunate enough to work on Java 6 or older, you’d do:
I’m trying to write a procedure in assembly that sorts an array using bubble-sort algorithm but I’m having a problem which is: In line 22, when the first iteration executed nothing is wrong, program loads array[i+1] perfectly into registrar $a1 and if the swap condition is valid, program swaps without any problem. However, in the … Read more
There is no way to do what you say in C++ with plain arrays. The C++ solution for that is by using the STL library that gives you the std::vector. You can use a vector in this way:
ECMAScript 6 introduces the easily polyfillable Object.assign: The Object.assign() method is used to copy the values of all enumerable own properties from one or more source objects to a target object. It will return the target object. The own length property of the array is not copied because it isn’t enumerable. Also, you can use … Read more