Category "dictionary"

Combine lists of dictionaries with specific value matches

Given a_list and b_list in python, I want to merge them so that the result is c_list. In the example below, only want to merge elements that have a matching 'A'

VBA: Creating a class property that is an array of dictionaries

In Microsoft Excel VBA I need to create a class that has two properties, "Name" and "Holdings". "Name" is just a string so the code for that is easy. But I ne

How to correctly define a dispatching function in C++?

I have the following problem: I receive commands through an AF_UNIX socket (no problems about network byte ordering). the first word in packet is the command, t

How to access an object inside another object in a map in react

react.js is complicated sometimes, I'm trying to access an information of a state, I have an array which has one object inside, and in this object, there is ano

Get a Map<String, List<String>> from List<Pojo>

I have a Student class with the following structure: class Student { String name; int age; String grade; } I have a List of Students (l

How can I count dictionary items with specific values inside list in Python?

I want to print and count the users who are 'male' and are born on 1973, 1980. Is there a way to search '1973' and '1980' in 'birthday' values so I can count th

Python: I have a list of dictionaries but when I try to call a specific Key and Value it is throwing a error

def readParksFile(fileName="national_parks(1).csv"): nationalParks = open(fileName) headers = nationalParks.readline() keys = headers.split(",")

Remove key from map kotlin

I have a map as follows val parentMap= mutableMapOf<String,String>() parentMap["key1"]="value1" parentMap["key2"]="value2" parentMap["key3"]

Python: Creating nested dictionaries, using keys stored in a list

EDIT: I forgot to mention that there are other dictionaries and lists, and the solutions suggested so far work very well for my example, but not if I want to ad

Is there a neat way of converting lists into maps with the keys set to the elements of original collection and values set to an enum in java

Java newbie... I have a dictionary like so: electronictypeModelsMap = { "laptops" => ["macbook", "thinkpad", "yoga"], "desktops" => ["macmini", "imac", "o

Is there a simple way to compare two class objects for all items that are not none?

I am looking to compare two instances of the same class, but only the items for which both are not None. for instance, I will have a Bolt class, and one instanc

How to make a dictionary of dictionaries with same keys in a loop [duplicate]

Hello i'm new to python and i'm trying to make a dictionary that can contain multiple dictionaries (depending on how many the user wants) and

Python: Best way to check if a key value match exists between two dictionaries?

edit I have 2 list of dictionaries and I am trying to compare the value of a key in the dictionaries list_1 to see if it that value exists in the value of a dif

creating dictionaries from values in pandas columns with repeating values

Considering this sample dataframe: location emp 0 fac_1 emp1 1 fac_2 emp2 2 fac_2 emp3 3 fac_3 emp4 4 fac_4 emp5 It can be recreated by

Dictionary difference similar to set difference

I have a dictionary and a list: dictionary = {'a':1, 'b':2, 'c':3, 'd':4, 'e':5, 'f':6} remove = ['b', 'c', 'e'] I need to split "dictionary" into two dictiona

Is there an expiring map in Java that expires elements after a period of time since *first* insertion?

I tried looking at cache mechanisms, such as Guava's Cache. Their expiration is only since last update. What I'm looking for is a data structure that stores ke

CSV adding values to an existing column and calling from a dictionary (no pandas)

I need to add some additional values to an existing column for my CSV file. So this is what I have so far: Sample input CSV file: Alfa,Beta,Charlie,Delta,Echo,F

Plotting nested lists seperately, which are inside nested dictionaries

I have a list consisting of multiple nested dictionaries and nested lists MyList = [{dict0}, {dict1}, {dict2} ... {dict2422}] dict0 = {'type': 'Feature', 'geom

Adding new key values in a dictionary that was imported from an CSV file?

Sorry But I can't use pandas. I have a sample input csv file that looks like this: Alfa,Beta,Charlie,Delta,Echo,Foxtrot,Golf,Hotel,India,Juliett,Kilo A1,B1,C1,D

converting a string to dot notation to access value in nested list in python

items={ "fruits": { "summerFruits": { "Mangoes":5, "melo

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