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Other 2022-01-24 22:36:35
qgis canvas as pyqt widget
from PyQt5 import QtCore, QtGui, QtWidgets from qgis.gui import QgsMapCanvas from qgis.core import QgsVectorLayer class Ui_MainWindow(object): def setupUi(self, MainWindow): self.main_window = MainWindow self.main_window.setObjectName... Add solution -
C++ 2021-11-20 07:42:24
what does map.count() return in c++
int n; cin>>n; long val; map<int,long> mp3; long long res=0; while(n--){ cin>>val; if(mp3.count(val)) res+=mp3[val]; //mp3.count(val) returns 1 if val is present in the map already or //the number of times the key K is prese... Add solution -
Java 2021-11-14 07:17:24
when to use collections in java
LIST: Can store duplicate values, Keeps the insertion order. It allows multiple null values, Also we can read a certain value by index. - ArrayList not syncronized, array based class - LinkedList not synchronized, doubly linked - Vect... Add solution -
Java 2021-11-06 02:17:13
hadoop in mapper combiner
public static class Map extends Mapper<Object, Text, Text, IntWritable> { Map count = new HashMap<Integer, Integer>(); public void map(Object key, Text value, Context context) throws IOException, InterruptedException { StringT... Add solution -
Java 2021-11-04 13:04:09
java hashmap syntax
// Import the HashMap class import java.util.HashMap; // First Example // Create a HashMap object called capitalCities HashMap<String, String> capitalCities = new HashMap<String, String>(); // Add keys and values (Country, City)... Add solution