this is where itertools.groupby may come in handy: from itertools import groupby a = [“a”, “a”, “b”, “b”, “a”, “a”, “c”, “c”] res = [key for key, _group in groupby(a)] print(res) # [‘a’, ‘b’, ‘a’, ‘c’] this is a version where you could ‘scale’ down the unique keys (but are guaranteed to have at leas … Read more
add these following css : h50{ padding-left: 35px !important; } summary::after{ position: absolute; } will bring + icon on left. 2 solved How do I move the + sign to the left?
You want to print the naem which you are receiving by the input and not a single character which is what you’d get if you used .charAt(). 1 solved Unable to print all the characters of a string by charAt() in Java? [closed]
isset($var) checks that the variable is defined in the current scope and its value is not null. Some examples: <?php isset($var); //false ?> <?php $var = null; isset($var); //false ?> <?php $var = “some string”; isset($var); //true ?> <?php $var = “”; isset($var); //true ?> <?php $var = false; isset($var); //true ?> solved How isset() … Read more
The example that you give is for plotting maps, usually starting from a shapefile. In that case the data contains a column named group which is used by geom_polygon to ensure that boundaries and shapes are connected correctly. If the column were named something else, e.g. xxx, then you’d use group = xxx. This question … Read more
The main() method in java acts as an entry point for the program. In android however there are different methods to define entry points. Such as onCreate() for Activities and onCreateView() for fragments. So you do not need to have any main() method in android. 2 solved Can I put a main method in java … Read more
regex.test(str); is the thing you want to check. It looks in str if it is mathing regex, true if it does, else false var a = “hey”; var b = “h~y”; var c = “he’”; var reg = /[’~]/ ; console.log(reg.test(a)); // false console.log(reg.test(b)); // true console.log(reg.test(c)) // true solved Regular expression match in javascript … Read more
You explicitly ask the compiler to generate unoptimized code with -O0. The result is indeed rather slow as the nested loops do not get optimized away. The java compiler probably does that and removes the empty loops, a rather easy optimization. If you could require the java compiler to generate unoptimized byte code and prevent … Read more
result of new should be assigned to a pointer ExtendedElement *extendedElement = new ExtendedElement(); elements should be a vector of pointers class Wrapper { private: std::vector<Element*> elements; public: void execute() { for (Element *element : elements) { element->execute(); } } void addTask(Element *element) { elements.push_back(element); } }; 0 solved How to do inheritance [duplicate]
It helps to read the documentation, that would have told you queue<int> q; … int cur = q.front(); q.pop(); solved Assign first item of queue to int [closed]
You can take advantage of CSS selector span[id$=lblResultsRaceName], which finds all spans that’s id ends with lblResultsRaceName and ‘td > span’, which finds all spans that have direct parent <td>: This code snippet will go through all racing result and prints all races: import requests from bs4 import BeautifulSoup url = “https://www.thedogs.com.au/Racing/Results.aspx?SearchDate=3-Jun-2018” def get_info(session,link): session.headers[‘User-Agent’] … Read more
Your code is confuse, but for what I understood, you want to analyse a certain phrase. First, the constructor of the class that handles the analyse must receive the String to analyse, since it is it’s job. (Every class has a job, the result it’s obtained from the classes methods). Second, there is a convention … Read more
The value 65533 is 0xFFFD. This is the Unicode “Replacement Character” which is used in place of a character that is unrepresentable. It is normally displayed as “�”. The reason you are getting this could be because your standard input (keyboard?) is not capable of producing the character “Δ. Try putting this character into a … Read more
Your first clause in your WHERE is only going to match rows where died is not null. given that, you can reorder the clauses something like: WHERE first_name NOT IN (‘Hannah’, ‘Julia’, ‘Frasier’) AND last_name NOT LIKE ‘%o%’ AND (nationality <> ‘German’ OR speciality <> ‘Photo’) AND ((died – born BETWEEN 50 AND 80 AND … Read more
The issue is here: int [] NumArray; element = NumArray.length -1 Details: you declared NumArray but never initialize it until the constructor is called (this is 100% ok) but the next line you are trying to get NumArray.length of the non initialized array and that is the reason… Solution: place this line inside the constructor, … Read more