How-to articles, tricks, and solutions about ARRAYS

To join array elements with a separator in Java, you can use the join method from the String class.

To add an element to an array in Java, you can use one of the following methods:

To add an element to the end of an array with a key-value pair in PHP, you can use the array_push() function.

To write a byte[] to a file in Java, you can use the following code:

Yes, you can pass an array as a parameter to a function in PHP.

In PHP, you can use the array_unique function to check if all values in an array are the same.

To convert an ArrayList<String> to a String[] array in Java, you can use the toArray method of the ArrayList class and pass it an empty array of the appropriate type:

To convert column integer values into date expressions in PHP, you can use the date function.

You can use the implode() function to convert an array to a delimited string in PHP.

To convert a List to an array in Java, you can use the toArray() method of the List interface. This method returns an array containing all of the elements in the list in the proper order.

To convert a multidimensional array into a single array in PHP, you can use the array_merge() function.

In pandas, you can convert a DataFrame to a NumPy array by using the values attribute.

You can use the toArray() method of the ArrayList class to convert an ArrayList of strings to a string array. Here's an example:

To convert a string to a character array in Java, you can use the toCharArray method of the String class. This method returns a new character array that represents the same sequence of characters as the string.

To create an array from a foreach loop in PHP, you can use the array push function array_push() inside the loop.

In Java, the length of a primitive array reflects the number of allocated elements in the array. This is the maximum number of elements that the array can hold.

Here's an example code snippet that demonstrates how to dump a NumPy array into a CSV file:

Using a foreach loop to clear the values of an array in PHP is an efficient way to do so.

To find the maximum value in an array of primitives in Java, you can use the Arrays.stream() method to create a stream from the array, and then use the Stream.max() method to find the maximum element in the stream. Here is an example of how to do this for

To get only a part of an array in Java, you can use the Arrays.copyOfRange() method, or you can use the System.arraycopy() method.

To get the length of a 2D array in Java, you can use the length field of the array.

In PHP, you can group an array of arrays (subarrays) by the value of a specific key in each subarray using the array_reduce() function.

To check if an array is null in Java, you can use the == operator and compare the array to null. For example:

To concatenate two arrays in Java, you can use the System.arraycopy method. Here's an example of how you can do this:

You can use the toArray() method of the List interface to convert a List<Integer> to an int[] in Java.