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To encode custom python objects as BSON with Pymongo, you have to write a SONManipulator. From the docs:SONManipulator instances allow you to specify transformations to be applied automatically by PyMongo.from pymongo.son_manipulator import SONManipulator class Transform(SONManipulator): def transform_incoming(self, son, collection): for (key, value) in son.items(): if isinstance(value, Custom): son[key] = encode_custom(value) elif isinstance(value, dict): # Make sure we recurse into sub-docs son[key] = self.transform_incoming(value, collection) return son def transform_outgoing(self, son, collection): for (key, value) in son.items(): ... Read More
To detect if there is any cycle in the undirected graph or not, we will use the DFS traversal for the given graph. For every visited vertex v, when we have found any adjacent vertex u, such that u is already visited, and u is not the parent of vertex v. Then one cycle is detected. We will assume that there are no parallel edges for any pair of vertices.Input and Output: Adjacency matrix 0 1 0 0 0 1 0 1 1 0 0 1 0 0 1 0 1 ... Read More
Yes, you can define an interface inside a class and it is known as a nested interface. You can’t access a nested interface directly; you need to access (implement) the nested interface using the inner class or by using the name of the class holding this nested interface.ExampleLive Demopublic class Sample { interface myInterface { void demo(); } class Inner implements myInterface { public void demo() { System.out.println("Welcome to Tutorialspoint"); } } public static void main(String args[]) { Inner obj ... Read More
Generally, to print the contents of an array you need to use for loops, in addition to that you can directly print an array using the toString() method of this class. This method accepts an array as a parameter and returns it in String format.ExampleLive Demoimport java.util.Arrays; public class PrintingArrays { public static void main(String args[]) { int[] myArray = {23, 93, 30, 56, 92, 39}; System.out.println(Arrays.toString(myArray)); } }Output[23, 93, 30, 56, 92, 39]
The flex-column-reverse is used to display reversed flex items with vertical orientation. Add the flex-column-reverse class as in the following code snippet −After that, add flex items inside it − Demo 1 Demo 2 Demo 3 You can try to run the following code to show flex items vertically and reversed −ExampleLive Demo Bootstrap Example Implementing Column Reverse Demo 1 Demo 2 Demo 3
The Arrays class of the java.util package provides you a method named asList(). This method accepts an array (of objects) and converts them into a list and returns it.ExampleLive Demoimport java.util.Arrays; import java.util.List; public class ArrayToList { public static void main(String args[]) { Integer[] myArray = {23, 93, 56, 92, 39}; List list = Arrays.asList(myArray); System.out.println(list); } }Output[23, 93, 56, 92, 39]
Java does not support the concept of default parameter however, you can achieve this usingMethod overloadingUsing method overloading if you define method with no arguments along with parametrized methods. Then you can call a method with zero arguments.Variable argumentsIn Java methods parameters accept arguments with three dots. These are known as variable arguments. Once you use variable arguments as a parameter method, while calling you can pass as many number of arguments to this method (variable number of arguments) or, you can simply call this method without passing any arguments.ExampleLive Demopublic class Sample { void demoMethod(String... args) { ... Read More
In JavaScript, the functions wrapped with parenthesis are called “Immediately Invoked Function Expressions" or "Self Executing Functions.The purpose of wrapping is to namespace and control the visibility of member functions. It wraps code inside a function scope and decrease clashing with other libraries. This is what we call Immediately Invoked Function Expression (IIFE) or Self Executing Anonymous Function.Here’s the syntax −(function() { // code })();As you can see above, the following pair of parentheses converts the code inside the parentheses into an expression −function(){...}In addition, the next pair, i.e. the second pair of parentheses continues the operation. It calls ... Read More
To set an outline on a button that indicates positive action, you need to use the btn-outline-success class in Bootstrap.Here is how you can set it: More (Green Outline) You can try to run the following code to implement the btn-outline-success class −ExampleLive Demo Bootstrap Example Python The following are the Python Technologies : Jython WxPython For more, click below: More (Green Outline)
decodeURIComponentTo decode a URL component in JavaScript, use the decodeURLComponent() method.ExampleYou can try to run the following code to decode a URL component − Check function display() { var uri = "http://example.com/welcome msg.jsp?name=åmit&sub=programming"; // first encode var encode = encodeURIComponent(uri); var decode = decodeURIComponent(encode); var result = "Encode= " + ... Read More