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PHP 2021-09-13 09:40:02
singleton in php
// General singleton class. class Singleton { // Hold the class instance. private static $instance = null; // The constructor is private // to prevent initiation with outer code. pri... Add solution -
Other 2021-09-12 23:12:03
react-image-lightbox npm
import React, { Component } from 'react';import Lightbox from 'react-image-lightbox';import 'react-image-lightbox/style.css'; // This only needs to be imported once&... Add solution -
C++ 2021-09-12 23:08:01
c++ vector allocator example
// vector::get_allocator #include <iostream> #include <vector> int main () { std::vector<int> myvector; int * p; unsigned int i; // allocate an array with space for 5 elements using vector's allocator: p = myvector.get_alloca... Add solution -
Java 2021-09-12 21:06:02
abstraction java
bstraction: Hiding the implementation details, concentrating on essentials things, without worrying about the details ■ In java, abstraction is achieved via abstract class or interface ■ Abstraction cannot exist without inheritance 3.1. Abstract cla... Add solution -
Other 2021-09-12 19:43:01
_pickle.unpicklingerror: invalid load key,
pickling is recursive, not sequential. Thus, to pickle a list, pickle will start to pickle the containing list, then pickle the first element… diving into the first element and pickling dependencies and sub-elements until the first element is ser... Add solution
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