keyvaluepair

I'm using a Dictionary<int, KeyValuePair<bool, int>> to hold data. From time to time I need to increment the int in the KeyValuePair , but it won't let me, because it has no setter. Is there a way to increment it? Code sample: Dictionary<int, KeyValuePair<bool, int>> mDictionary = new Dictionary<int, KeyValuePair<bool, int>>(); mDictionary[trapType].Value++; //Error: The property KeyValuePair<TKey, Tvalue>>.Value has no setter Is there a way to increment it? No. KeyValuePair is immutable - it's also a value type, so changing the value of the Value property after creating a copy wouldn't help

If I had an array as such: var myarray = []; myarray.push({ "Name": 'Adam', "Age": 33 }); myarray.push({ "Name": 'Emily', "Age": 32 }); This gives me an array where I can pull out values like myarray[0].Name which would give me "Adam". However, after this array is built, how can I add an "address" field with a value of "somewhere street" into the array at position [0], so that my fields in that object at position zero are now Name , Age , and Address with corresponding values? I was thinking splice() somehow but couldn't find an example using objects, just examples with simple arrays. You can

How can you use the value of a key-value pair as the key in a different key-value pair in javascript? I'd like to do the following: var gizmos = {gizmo1: "G1"}; var things = {gizmos.gizmo1: "T1"}; So that things essentially equals: var things = {"G1": "T1"}; Like this: var gizmos = {gizmo1: "G1"}; var things = {}; things[gizmos.gizmo1] = "T1"; There's no way to do it as part of the object initializer (aka object "literal"), you have to do it after. The reason it works is that in JavaScript, you can access (get or set) a property on an object in two ways: Either using dotted notation and a

I'm developing a React application where I need to convert a key-value object like this: { 0: 'John', 1: 'Tim', 2: 'Matt' }; To an array of just the values like this: ['John', 'Tim', 'Matt'] How do I accomplish this? const obj = { 0: 'John', 1: 'Tim', 2: 'Matt' }; const arr = /* ??? */; You can make use of Object.values command. According to the docs . Object.values() returns an array whose elements are the enumerable property values found on the object. The ordering of the properties is the same as that given by looping over the property values of the object manually Although it is an ES2017

I'm trying to load a list of KeyValuePairs from an EF / Linq query like this: return (from o in context.myTable select new KeyValuePair<int, string>(o.columnA, o.columnB)).ToList(); My problem is that this results in the error "Only parameterless constructors and initializers are supported in LINQ to Entities." Is there an easy way around this? I know I could create a custom class for this instead of using KeyValuePair but that does seem like re-inventing the wheel. Select only columnA and columnB from your table, and move further processing in memory: return context.myTable .Select(o => new {

I have two arrays , keys and commonkeys I want to create a key value pair using these two arrays and the output should be like langKeys How to do that? This is array one var keys=['en_US','es_ES', 'pt_PT','fr_FR','de_DE','ja_JP','it_IT'] This is array two var commonKeys=['en-*','es-*', 'pt-*','fr-*','de-*','ja-*','it-*', '*'] This is the output I need var langKeys = { 'en-*':'en_US', 'es-*':'es_ES', 'pt-*':'pt_PT', 'fr-*':'fr_FR', 'de-*':'de_DE', 'ja-*':'ja_JP', 'it-*':'it_IT', '*':'en_US' }; JavaScript is a very versatile language, so it is possible to do what you want in a number of ways.

I have a large PHP array, similar to: $list = array( array( 'id' = '3243' 'link' = 'fruits' 'lev' = '1' ), array( 'id' = '6546' 'link' = 'apple' 'lev' = '2' ), array( 'id' = '9348' 'link' = 'orange' 'lev' = '2' ) ) I want to get the sub-array which contains a particular id . Currently I use the following code: $id = '3243' foreach ($list as $link) { if (in_array($id, $link)) { $result = $link; } } It works but I hope there is a better way of doing this. You can write $link['id']==$id instead of in_array($id, $link) whitch will be less expensive. add a break; instruction after $result = $link;

This question already has an answer here: Reshaping multiple sets of measurement columns (wide format) into single columns (long format) 7 answers I want to gather two seperate groups of columns into two key-value pairs. Here's some example data: library(dplyr) library(tidyr) ID = c(1:5) measure1 = c(1:5) measure2 = c(6:10) letter1 = c("a", "b", "c", "d", "e") letter2 = c("f", "g", "h", "i", "j") df = data.frame(ID, measure1, measure2, letter1, letter2) df = tbl_df(df) df$letter1 <- as.character(df$letter1) df$letter2 <- as.character(df$letter2) I want the values of the two measure columns