Recent questions tagged dictionary

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dictionary - Efficient way to filter a Map by value in Elixir

In Elixir, what would be an efficient way to filter a Map by its values. Right now I have the following ... would be a more efficient solution? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dictionary - Java 8 stream join and return multiple values

I'm porting a piece of code from .NET to Java and stumbled upon a scenario where I want to use stream ... that resembles more like C# than java See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dictionary - OrderedDict vs Dict in python

In Tim Peter's answer to "Are there any reasons not to use an ordered dictionary", he says OrderedDict is a subclass ... of 3: 1.23 ms per loop See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dictionary - Using string object as a hash key in Common Lisp

I'm trying to create a "dictionary" type - ie hash table with a string as a key. Is this possible or wise in ... > (gethash "one" table) NIL NIL See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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725 views

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dictionary - Scala: Remove none elements from map and flatten

I have a map: Map("key1" -> Some("value1"), "key2" -> None, "key3" -> Some("value3")) I want to remove ... -> value3) Do you know a better way? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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651 views

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dictionary - Add two maps in Groovy while summing up values for common keys

I have two maps in Groovy [a: 1, b: 2] and [b:1, c:3] and would like to create from them a third ... two maps, if the keys are identical. Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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632 views

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dictionary - Python 2.6 TreeMap/SortedDictionary?

Is there a built-in sorted dictionary implementation in Python 2.6, or are hashtables the only kind? ... dictionarys, not ordered dictionaries! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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599 views

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dictionary - Computing the memory footprint (or byte length) of a map

I want to limit a map to be maximum X bytes. It seems there is no straightforward way of computing the ... this? Preferably a code example. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dictionary - Divide the values of two dictionaries in python

I have two dictionaries with the same keys and I would like to do division on the values to update or create ... for a more elegant solution. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dictionary - How to get X Y Z coordinates of tile by click on Leaflet map

I want to ask for help to deal with the possible use of non-standard coordinates on the map Leaflet. I want ... Thanks in advance for your help! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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540 views

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dictionary - How can I get the nested keys of a map in clojure?

if my structure is { :a :A :b :B :c { :d :D } :e { :f { :g :G :h :H } } } I would like ... sure that my-other-map has the same keys that my-map See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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500 views

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dictionary - How can I get the nested keys of a map in clojure?

if my structure is { :a :A :b :B :c { :d :D } :e { :f { :g :G :h :H } } } I would like ... sure that my-other-map has the same keys that my-map See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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522 views

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dictionary - How to get X Y Z coordinates of tile by click on Leaflet map

I want to ask for help to deal with the possible use of non-standard coordinates on the map Leaflet. I want ... Thanks in advance for your help! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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513 views

1 answer

dictionary - How can I get the nested keys of a map in clojure?

if my structure is { :a :A :b :B :c { :d :D } :e { :f { :g :G :h :H } } } I would like ... sure that my-other-map has the same keys that my-map See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

651 views

1 answer

dictionary - How to get X Y Z coordinates of tile by click on Leaflet map

I want to ask for help to deal with the possible use of non-standard coordinates on the map Leaflet. I want ... Thanks in advance for your help! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

556 views

1 answer

dictionary - How can I get the nested keys of a map in clojure?

if my structure is { :a :A :b :B :c { :d :D } :e { :f { :g :G :h :H } } } I would like ... sure that my-other-map has the same keys that my-map See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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513 views

1 answer

dictionary - Copying all elements of a map into another

Given var dst, src map[K]V I can copy all entries from src into dst by doing for k, v := range src { ... on slices (and string as a source). See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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661 views

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dictionary - Difference between dict and set (python)

So, I know that this, a = {} # dict constructs an empty dictionary. Now, I also picked up that ... am I missing something blatantly obvious? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.5k views

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dictionary - What is the best ordered dict implementation in python?

I've seen (and written) a number of implementations of this. Is there one that is considered the best or is ... clear that it is the winner. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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468 views

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dictionary - How to create an OrderedDict in Python?

I tried to maintain the order of a Python dictionary, since native dict doesn't have any order to it. Many ... 't preserve this order, though. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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564 views

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dictionary - How to combine filter and map in Scala?

I have List[Int] in Scala. The List is List(1,2,3,4,5,6,7,8,9,10). I want to filter the list ... multiply the numbers with 2. Is it possible? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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536 views

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dictionary - C# Binary Trees and Dictionaries

I'm struggling with the concept of when to use binary search trees and when to use dictionaries. In my ... either of the mentioned structures? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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975 views

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dictionary - golang - how to initialize a map field within a struct?

I'm confused about the best way to initialize a struct that contains a map. Running this code produces panic: ... -accepted way to do this. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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497 views

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dictionary - Python equivalent of zip for dictionaries

If I have these two lists: la = [1, 2, 3] lb = [4, 5, 6] I can iterate over them as follows: ... (da, db): print key, value_a, value_b See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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651 views

1 answer

dictionary - Does Groovy have method to merge 2 maps?

First map is default options [a: true, b: false]. Second map - options passed by user [a:false]. Does ... asking about method out of the box See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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757 views

1 answer

dictionary - How to convert interface{} to map

I am trying to create a function that could accept following *struct []*struct map[string]*struct Here struct could ... or get it's elements. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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531 views

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dictionary - Python update a key in dict if it doesn't exist

I want to insert a key-value pair into dict if key not in dict.keys(). Basically I could do it with: ... the pythonic solution to this problem? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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703 views

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dictionary - Nested maps in Golang

func main() { var data = map[string]string{} data["a"] = "x" data["b"] = "x" data["c"] ... there no multiple bracket support for nested maps? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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