How to convert a char array to a string?
The string class has a constructor that takes a NULL-terminated C-string:
arrays
Sort array of objects by string property value
It’s easy enough to write your own comparison function: Or inline (c/o Marco Demaio):
Array.size() vs Array.length
Array.size() is not a valid method Always use the length property There is a library or script adding the size method to the array prototype since this is not a native array method. This is commonly done to add support for a custom getter. An example of using this would be when you want to … Read more
How can I remove a specific item from an array?
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. Run code snippet The second parameter of splice is the number of elements to remove. Note that splice modifies the array in place and returns a … Read more
Java Error “Exception in thread “main” java.util.InputMismatchException” On an Array program
First of all, remember to indent your code for readability. Concept 1. Concept 2. // compare Strings using compareTo method (which returns 0 if equal Rest of your code and concepts are correct 🙂
Passing an array by reference
It’s a syntax for array references – you need to use (&array) to clarify to the compiler that you want a reference to an array, rather than the (invalid) array of references int & array[100];. EDIT: Some clarification. These three are different ways of declaring the same function. They’re all treated as taking an int * parameter, you can pass … Read more
Converting array to list in Java
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.
Split string into array
Use the .split() method. When specifying an empty string as the separator, the split() method will return an array with one element per character.
numpy matrix vector multiplication
Simplest solution Use numpy.dot or a.dot(b). See the documentation here. This occurs because numpy arrays are not matrices, and the standard operations *, +, -, / work element-wise on arrays. Note that while you can use numpy.matrix (as of early 2021) where * will be treated like standard matrix multiplication, numpy.matrix is deprecated and may … Read more
How do I create an array of strings in C?
If you don’t want to change the strings, then you could simply do When you do it like this you will allocate an array of two pointers to const char. These pointers will then be set to the addresses of the static strings “blah” and “hmm”. If you do want to be able to change the actual string content, … Read more