FAQ Database Discussion Community

## Create list of sublists [closed]

python,list,sublist
I have a list of 50,000 integers: I want to create a list of sublists from this large list. The sublist is created by finding within the list the position that has a difference with the first value of the list of 1,000,000. Below is my code: sub_pos_list = []...

## Python, comparison sublists and making a list

python,comparison,append,sublist
I have a list that contains a lot of sublists. i.e. mylst = [[1, 343, 407, 433, 27], [1, 344, 413, 744, 302], [1, 344, 500, 600, 100], [1, 344, 752, 1114, 363], [1, 345, 755, 922, 168], [2, 345, 188, 1093, 906], [2, 346, 4, 950, 947], [2, 346,...

## how to find max element from dictionary that has list of lists in python

python,list,dictionary,sublist
I'm a newbie to python, i was thinking of writing a function that basically outputs the largest among sublists present inside a dictionary based on a threshold value. ex: champs = create_champion_index({'a': [[0, 10], [1, 20], [2,15]], 'b': [[0, 20], [1, 15], [2, 10]]}, 2) >>champs['a'] [[1, 20], [2, 15]]...

## Prolog Length of Evens in a List [duplicate]

list,recursion,prolog,sublist,variable-length
This question already has an answer here: How to count all even numbers in a list 2 answers I am a Prolog beginner, and I have the following length function: mylen([H|Lc],N) :- mylen(Lc,M),N is M+1. mylen([],0). I would like to know if there's an easy way to query the...

## How to check if a list is a non-empty sublist of another list in Prolog

prolog,sublist
I am trying to create an included_list(X,Y) term that checks if X is a non-empty sublist of Y. I already use this for checking if the elements exist on the Y list check_x(X,[X|Tail]). check_x(X,[Head|Tail]):- check_x(X,Tail). And the append term append([], L, L). append([X | L1], L2, [X | L3]) :-...

## Sublists in a 2D List, Referencing

java,reference,sublist
I have a 2D List of objects. I'm trying to access a list and replace it with a sublist of itself. I made up a simple example below, I want to replace dList.get(0) with dList.get(0).subList(1,3). I use a reference variable, which updates the values in the original list, but the...

## python- searching dictionary sublists; converting dictionary keys to values

python,search,dictionary,sublist
Say I have the following dictionary (the one I'm using is much, much larger): dict1={1:["item", "word", "thing"], 2:["word", "item"], 3:["thing", "item", "item"]} and have every word used in the dictionary stored in a list: all_words=["item", "word", "thing"] I want to run each word of the list through the dictionary sublists,...

## Extract the data from the sublist into dataframe

r,list,extract,dataframes,sublist
the structure of the list as follow (the list goes on with the same structure): > str(parsedData) > List of 1658 > \$ :List of 2 > ..\$ Date : chr "2010-08-16" > ..\$ Volatility: num 11.1 > \$ :List of 2 > ..\$ Date : chr "2010-08-17" > ..\$...

## Python matching-item based concatenation of list of sublists?

python,list,merge,sublist
Without getting too deep, the Input below represents the following: [geometry,name,z-coord,key-region, ... ] Any key-regions matching between sublists influence the merger of the sublists where the geometry fields are combined into a single string, and the name fields are combined into a single string. All while retaining the remainder of...

## Haskell Split list into Sublist using pattern recognition

I am trying to split a Array containing I and Os, if a certain pattern occurs. lets assume i have an input, looking like this: data Bit = O | I deriving (Eq, Show) let b = [I,I,O,O,O,O,O,I,I,O,O,O,I,O] that is what i am generating, when encoding [[Bool]] -> [Bit] corresponding...

## PYTHON: Create sublists of same values from nested list into one list

python,list,sublist
I have a nested list with lists that have two values, a word and a number (sorted by first value - the word): data=[["apple",2],["cake",5],["cake",8],["chocolate",3],["chocolate",9],["chocolate",10],["grapes",6]] How can I make it so that it groups items with the same word together as efficiently as possible? So to make the list look like...

## count sublists that has a specific term in python

python,list,sublist
I'm a newbie I want to write a function that outputs the count of sublists that contain a particular element. But my function just outputs the total count of that particular term in all the sublists. My function: def count(myList): tmp = [] d = {} for item in myList:...

## Sublists of a list in java

java,list,sorting,arraylist,sublist
There are N buildings in a certain one-dimensional landscape. Each building has a height given by hi,i∈[1,N]. If you join K adjacent buildings, they will form a solid rectangle of area K×min(hi,hi+1,…,hi+k−1). Given N buildings, find the greatest such solid area formed by consecutive buildings. Input Format The first line...

## Sort list from a specific index value in python

python,list,sorting,indexing,sublist
I want to sort a python list from a specific index. Here is what I want to achieve. Consider a list al = [1,2,4,3] Now what I want to do is, start from the last index, go back and swap the number which is smaller than the last index, i.e...

## How to create a list of sublists in Lisp without map?

list,recursion,lisp,sublist
I'm trying to make a function that creates a list of all sublists in the given list. What I mean is, when I've got a list: (4 (a g b) g (1 2 3) g (4 5 6)) I want a list: ((a g b) (1 2 3) (4 5...

## Java - Create sublist from a list based on suffix

java,arraylist,collections,iterator,sublist
I'm trying to create sublists from a list based on the suffix. public class Test { public static void main(String args[]) { List<List<String>> subList = new ArrayList<List<String>>(); List<String> myList = new ArrayList<String>(); myList.add("Text_1"); myList.add("XYZ_3"); myList.add("ABC_1"); myList.add("Text_2"); myList.add("Text_3"); myList.add("XYZ_1"); myList.add("XYZ_2"); myList.add("ABC_2"); for (String item : myList) { List<String> tempList = new...

## Sublisting list of integers into lists of same integers

algorithm,list,divide,sublist
Hi I have a simple question. I am grabbing data from an API and the way that they have their data setup is that objects have an id and I return it into a list. So I will get a list of objects like so: List = {Object1, Object2, Object3,...

## Android - FATAL EXCEPTION: main when adding subList

android,listview,arraylist,sublist
I'm currently working on my first Android application. It parses JSON Data and puts it in a ListView (see below). protected void onPostExecute(String result){ try { JSONArray json = new JSONArray(result); for(int i = 0; i < json.length(); i++) { listItems.add(json.getJSONObject(i).getString(("title"))); adapter.notifyDataSetChanged(); } } catch (JSONException e) { e.printStackTrace(); }...

## To check if sublist exists in another list

list,python-3.x,sublist
coll = [[3, 3], [2, 2, 2], [2, 4], [2, 3], [2, 2]] main = [4, 3, 3, 2, 2, 2, 2, 2, 2, 2] I have 2 lists. 'coll' is a list of lists with each sublist containing integers which might have duplicates(ex- [2, 2, 2]). And main is...