Develop Reference

How to add a new item into an specific position of a list of objects

I have two list of objects(authors1, authors2), notice the authors1 is already sorted by SDATE,
what I want to do is add the authors2 items into authors1 keeping same order, notice that all new items added needs to go to the end of each group of items
IList<Author> authors1 = new List<Author>
{
new Author { Book = "c#", Code="A11" , SDate = 1 },
new Author { Book = "c#", Code="A22" , SDate = 1 },
new Author { Book = "c#", Code="A31" , SDate = 1 },
new Author { Book = "js", Code="B43" , SDate = 2 },
new Author { Book = "js", Code="B33" , SDate = 2 },
new Author { Book = "js", Code="B41" , SDate = 2 },
new Author { Book = "java", Code="C27", SDate = 3 },
new Author { Book = "java", Code="C33", SDate = 3 },
new Author { Book = "java", Code="C78", SDate = 3 }
};
IList<Author> authors2 = new List<Author>
{
new Author { Book = "c#", Code = "A21" },
new Author { Book = "java", Code = "C23" }
};
EXPECTED
IList<Author> authors1 = new List<Author>
{
new Author { Book = "c#", Code="A11", SDate = 1 },
new Author { Book = "c#", Code="A22", SDate = 1 },
new Author { Book = "c#", Code="A31", SDate = 1 },
new Author { Book = "c#", Code="A21", SDATE = 1 }, // new item added to the end of this group
new Author { Book = "js", Code="B43", SDate = 2 },
new Author { Book = "js", Code="B33", SDate = 2 },
new Author { Book = "js", Code="B41", SDate = 2 },
new Author { Book="java", Code="C27", SDate=3 },
new Author { Book="java", Code="C33", SDate=3 },
new Author { Book="java", Code="C78", SDate=3 },
new Author { Book="java", Code="C23", SDATE=3 } // new item added to the end of this group
};
how can I accomplish this functionality?
I was trying with two foreach, and then push the items into a new list,
please help
IList<Author> response = new List<Author>();
foreach (var author in authors2.GroupBy(x => x.Book).ToList())
{
foreach (var item in author)
{

You could do something like:
foreach(Author a in authors2)
{
Author b = authors1.Where(x => x.Book == a.Book).LastOrDefault();
if (b != null)
{
int index = authors1.IndexOf(b);
a.SDate = b.SDate;
authors1.Insert(index + 1, a);
}
}

How do I write a strongly typed query filter where an array is a sub-array or equal to another array in MondoDB using C# driver?

Model:
{
_id: "1025",
CandidateName: "John"
Activities:["Programming", "Gaming"]
}
ChoicheOfActivities = ["Programming", "Gaming", "Singing", "Acting"];
Candidate1 = {_id:"1", Name: "John", Activities: ["Programming", "Gaming"]};
Candidate2 = {_id:"2", Name: "Mike", Activities: ["Programming", "Singing"]};
Candidate3 = {_id:"3", Name: "Joey", Activities: ["Gaming","Programming", "Singing", "Acting"]};
Candidate4 = {_id:"4", Name: "Ross", Activities: ["Programming", "Kayaking"]};
I want to filter the candidates who have activities that are sub or equal set to the ChoiceOfAtivities.
After applying the filter I want the results to be
Candidate1 = {_id:"1", Name: "John", Activities: ["Programming", "Gaming"]};
Candidate2 = {_id:"2", Name: "Mike", Activities: ["Programming", "Singing"]};
Candidate3 = {_id:"3", Name: "Joey", Activities: ["Gaming","Programming", "Singing", "Acting"]};
Candidate3 won't be selected because it has an activity "Kayaking" which is not in the ChoiceOfAtivities.
Note: I want to apply this when filtering not on a list or an Enumerable.

#varman query is correct, however, this is how we'd express it as C#/.NET
We'd start by creating a class that represents our document:
class Candidate
{
public string Id { get; set; }
public string Name { get; set; }
public string[] Activities { get; set; }
}
Then to get things started we'll just connect to mongo and insert your sample data in to the test database.
var client = new MongoClient();
var db = client.GetDatabase("test");
var collection = db.GetCollection<Candidate>("candidates");
var candidate1 = new Candidate { Id = "1", Name = "John", Activities = new[] { "Programming", "Gaming" } };
var candidate2 = new Candidate { Id = "2", Name = "Mike", Activities = new[] { "Programming", "Singing" } };
var candidate3 = new Candidate { Id = "3", Name = "Joey", Activities = new[] { "Gaming", "Programming", "Singing", "Acting" } };
var candidate4 = new Candidate { Id = "4", Name = "Ross", Activities = new[] { "Programming", "Kayaking" } };
await collection.InsertManyAsync(new[]
{
candidate1,
candidate2,
candidate3,
candidate4
});
Now we'll build up some filters using the filter builder.
var choiceOfActivities = new[] {"Programming", "Gaming", "Singing", "Acting"};
var filter = Builders<Candidate>.Filter.Not(
Builders<Candidate>.Filter.ElemMatch(candidate => candidate.Activities,
new BsonDocument("$nin", BsonArray.Create(choiceOfActivities))));
Then we can execute a find on our collection and get our the result
var results = await collection.Find(filter)
.ToListAsync();
foreach (var result in results)
{
Console.WriteLine($"{result.Id}, {result.Name}, {string.Join(" + ", result.Activities)}");
}
// 1, John, Programming + Gaming
// 2, Mike, Programming + Singing
// 3, Joey, Gaming + Programming + Singing + Acting

You can do like this way
db.collection.find({
Activities: {
$not: {
"$elemMatch": {
$nin: [
"Programming",
"Gaming",
"Singing",
"Acting"
]
}
}
}
})
Working Mongo playground

PayPal - How do I dynamically create line-items at the PayPal order request body?

I am currently trying to integrate the PayPal smart button to my asp.net core web application. I've referenced the following API documentation to set up a transaction with the PayPal API from my server: https://developer.paypal.com/docs/checkout/reference/server-integration/set-up-transaction/#on-the-server. However, the documentation hardcoded the line-items in the PayPal order request body. Right now, I have a variable called lineItems that contains a list of products that I want to send to PayPal. How do I dynamically create the lineItems at the BuildRequestBody() method? Below is my current code:
Update I am still trying to solve this issue. Help is greatly appreciated!
Update2 Still trying to solve this issue, help is greatly needed.
Update3 Is anyone having the same issue as me? The documentation is extremely vague and I need help.
Update4 No progress, still in need of help!
public async Task<HttpResponse> createPaypalTransaction()
{
List<Product> lineItems = new List<Product>();
decimal totalPrice = 4.00;
lineItems.Add(new Product
{
ProductId = 1,
ProductName = "T-Shirt",
Quantity = 2,
Price = 2.00M
});
lineItems.Add(new SanitizeProduct
{
ProductId = 2,
ProductName = "Shoe",
Quantity = 2,
Price = 2.00M
});
var request = new OrdersCreateRequest();
request.Prefer("return=representation");
request.RequestBody(BuildRequestBody());
//3. Call PayPal to set up a transaction
var response = await PayPalClient.client().Execute(request);
var result = response.Result<PayPalCheckoutSdk.Orders.Order>();
Console.WriteLine("Status: {0}", result.Status);
Console.WriteLine("Order Id: {0}", result.Id);
Console.WriteLine("Intent: {0}", result.Intent);
Console.WriteLine("Links:");
foreach (LinkDescription link in result.Links)
{
Console.WriteLine("\t{0}: {1}\tCall Type: {2}", link.Rel, link.Href, link.Method);
}
AmountWithBreakdown amount = result.PurchaseUnits[0].Amount;
Console.WriteLine("Total Amount: {0} {1}", amount.CurrencyCode, amount.Value);
return response;
}
/*
Method to generate sample create order body with CAPTURE intent
#return OrderRequest with created order request
*/
private static OrderRequest BuildRequestBody(decimal totalPrice, List<SanitizeProduct> lineItems)
{
OrderRequest orderRequest = new OrderRequest()
{
Intent = "CAPTURE",
ApplicationContext = new ApplicationContext
{
BrandName = "12345",
UserAction = "CONTINUE",
},
PurchaseUnits = new List<PurchaseUnitRequest>
{
new PurchaseUnitRequest{
ReferenceId = "PUHF",
Description = "Customisable Goods",
CustomId = "CUST-HighFashions",
SoftDescriptor = "HighFashions",
Amount = new AmountWithBreakdown
{
CurrencyCode = "SGD",
Value = "230.00",
Breakdown = new AmountBreakdown
{
// The subtotal for all items (quantity * price)
ItemTotal = new Money
{
CurrencyCode = "SGD",
Value = "230.00"
},
}
},
// How do i dynamically generate the list of items instead of hardcoding it?
Items = new List<Item>
{
new Item
{
Name = "T-shirt",
Description = "Green XL",
Sku = "sku01",
UnitAmount = new Money
{
CurrencyCode = "SGD",
Value = "90.00"
},
Tax = new Money
{
CurrencyCode = "SGD",
Value = "10.00"
},
Quantity = "1",
Category = "PHYSICAL_GOODS"
},
new Item
{
Name = "Shoes",
Description = "Running, Size 10.5",
Sku = "sku02",
UnitAmount = new Money
{
CurrencyCode = "SGD",
Value = "45.00"
},
Tax = new Money
{
CurrencyCode = "SGD",
Value = "5.00"
},
Quantity = "2",
Category = "PHYSICAL_GOODS"
}
},
}
}
};
return orderRequest;
}

Find an Object that contains a string in a list of strings using LINQ

I have these lists:
List<Author> MyAuthorList = new List<Author>();
List<string> BookListNo1 = new List<string>() { "The Girl with the Dragon Tattoo", "The Name of the Rose", "The Alienist", "In Cold Blood", "The Firm" };
List<string> BookListNo2 = new List<string>() { "And Then There Were None", "Mystic River", "The Shadow of the Wind", "Angels & Demons" , "The Big Sleep", "The Pelican Brief" };
List<string> BookListNo3 = new List<string>() { "One for the Money", "The Maltese Falcon", "In the Woods", "Presumed Innocent", "The Thirteenth Tale", "A is for Alibi", "Postmortem" };
List<string> BookListNo4 = new List<string>() { "Midnight in the Garden of Good and Evil", "The Strange Case of Dr. Jekyll and Mr. Hyde", "A Time to Kill", "The Historian" };
MyAuthorList.Add(new Author() { FirstName = "John", LastName = "Smith", Address = "Germany", Age = 13, NumberOfBooks = 5, EMBG = 123123, Books = BookListNo1, BankAccount = 1111, BankName = "Stupid Bank Name", BankAddress = "No One Knows" });
MyAuthorList.Add(new Author() { FirstName = "Max", LastName = "Warren", Address = "France", Age = 32, NumberOfBooks = 6, EMBG = 321321, Books = BookListNo2, BankAccount = 2222, BankName = "Stupid Bank Name", BankAddress = "Near The Bakery" });
MyAuthorList.Add(new Author() { FirstName = "Quinn", LastName = "Swanson", Address = "Russia", Age = 11, NumberOfBooks = 7, EMBG = 456456, Books = BookListNo3, BankAccount = 3333, BankName = "Stupid Bank Name", BankAddress = "On Some Desert Island" });
MyAuthorList.Add(new Author() { FirstName = "Ben", LastName = "Chaplin", Address = "Indonesia", Age = 34, NumberOfBooks = 4, EMBG = 654654, Books = BookListNo4, BankAccount = 4444, BankName = "Stupid Bank Name", BankAddress = "Moskovska 45" });
MyAuthorList.Add(new Author() { FirstName = "Jack", LastName = "Smirnoff", Address = "Germany", Age = 35, NumberOfBooks = 6, EMBG = 789789, Books = BookListNo2, BankAccount = 5555, BankName = "Stupid Bank Name 2", BankAddress = "Moskovska 452" });
Now I need to find all Authors from Germany with books that have the words "Girl" and "Blood" in them.
This is what I have tried so far:
I get all the authors from Germany like this:
var germanAuthors = MyAuthorList.Where(x => x.Address.Contains("Germany"));
..and all the books that have the words "Blood" and "Girl" in them like this:
var BooksOfAuthorsFromGermany = MyAuthorList.Where(x => x.Address.Contains("Germany")).SelectMany(y => y.Books);
List<string> words = new List<string> { "Blood", "Girl"};
var searchedListOfBooks = BooksOfAuthorsFromGermany.Where(s => words.Any(w => s.Contains(w)));
However, I can't combine these two together.
Do I need to do this in a completely different way?

Try this
var BooksOfAuthorsFromGermany = MyAuthorList
.Where(x => x.Address.Contains("Germany")
&& x.Books.Where(a => a.Contains("Girl")
|| a.Contains("Blood")).Count() > 0)
.ToList();

You can combine two query as follows ,
List<string> words = new List<string> { "Blood", "Girl"};
var AuthorList = MyAuthorList.Where(x => x.Address.Contains("Germany") && x.Books.Any(a => words.Any(w=> a.Contains(w)))).ToList();

According to your requirement you can use this
var germanAuthors = MyAuthorList.Where(x => x.Address.Contains("Germany") && x.Books.Any(y => y.Contains("Blood") && y.Contains("Girl"))).Select(Z => Z.FirstName);
var germanAuthorsWithBloodOrGirl = MyAuthorList.Where(x => x.Address.Contains("Germany") && x.Books.Any(y => y.Contains("Blood") || y.Contains("Girl"))).Select(Z => Z.FirstName);

NEST compound queries which must all be satisfied

var availableToField = Infer.Field<Project>(f => f.Availablity.AvailableTo);
var availableFromField = Infer.Field<Project>(f => f.Availablity.AvailableFrom);
var nameField = Infer.Field<Project>(f => f.Contact.Name);
var active_date_to = new DateRangeQuery(){
Name = "toDate",
Boost = 1.1,
Field = "availablity.availableTo",
GreaterThan = DateTime.Now,
TimeZone = "+01:00",
Format = "yyyy-MM-ddTHH:mm:SS||dd.MM.yyyy"
};
var active_date_from = new DateRangeQuery(){
Name = "from",
Boost = 1.1,
Field = "availablity.availableFrom",
LessThanOrEqualTo = DateTime.Now,
TimeZone = "+01:00",
Format = "yyyy-MM-ddTHH:mm:SS||dd.MM.yyyy"
};
public ISearchResult<Project> Search(SearchCriteria criteria)
{var ret = _client.Search<Project>(s =>
s.Query(q =>
active_date_from &&
active_date_to &&
q.Match(d => d.Query(criteria.FreeText))
).From(criteria.CurrentPage).Size(criteria.Take)
.From(criteria.CurrentPage)
.Take(criteria.Take)
);
result.Total = ret.Total;
result.Page = criteria.CurrentPage;
result.PerPage = criteria.Take;
result.Results = ret.Documents;
return result;
}
what im trying to do is get the results matching the freetext but are also withing the pricerange..
somehow though what i get is an invalid NEST response build from a unsuccessful low level call on POST... and in consequence an empty query.
there are no compiling errors.
does anyone have an idea where i could have gone wrong or what im missing?
the other thing i tried was
var mustClauses = new List<QueryContainer>();
mustClauses.Add(active_date_from);
mustClauses.Add(active_date_to);
mustClauses.Add(new TermQuery
{
Field = "contact.name",
Value = criteria.FreeText
});
var searchRequest = new SearchRequest<Project>()
{
Size = 10,
From = 0,
Query = new BoolQuery
{
Must = mustClauses
}
};
var ret = _client.Search<Project>(searchRequest);
result.Total = ret.Total;
result.Page = criteria.CurrentPage;
result.PerPage = criteria.Take;
result.Results = ret.Documents;
which got me pretty much the same results.. (read: none)
is there something im missing?
edit:
however.. this:
var ret = _client.Search<Project>(s => s.Query(q => q.Match(m => m.Field(f => f.DisplayName).Query(criteria.FreeText))));
gives me exactly what i want (without the validation of the dates of course and only looking at one field)

In your first example, the match query is missing a field property which is needed for the query. Because of NEST's conditionless query behaviour, the query is not serialized as part of the request. The two date range queries are serialized however.
Here's a simple example that you may find useful to get the correct query you're looking for
void Main()
{
var pool = new SingleNodeConnectionPool(new Uri("http://localhost:9200"));
var defaultIndex = "projects";
var connectionSettings = new ConnectionSettings(pool, new InMemoryConnection())
.DefaultIndex(defaultIndex )
.PrettyJson()
.DisableDirectStreaming()
.OnRequestCompleted(response =>
{
if (response.RequestBodyInBytes != null)
{
Console.WriteLine(
$"{response.HttpMethod} {response.Uri} \n" +
$"{Encoding.UTF8.GetString(response.RequestBodyInBytes)}");
}
else
{
Console.WriteLine($"{response.HttpMethod} {response.Uri}");
}
Console.WriteLine();
if (response.ResponseBodyInBytes != null)
{
Console.WriteLine($"Status: {response.HttpStatusCode}\n" +
$"{Encoding.UTF8.GetString(response.ResponseBodyInBytes)}\n" +
$"{new string('-', 30)}\n");
}
else
{
Console.WriteLine($"Status: {response.HttpStatusCode}\n" +
$"{new string('-', 30)}\n");
}
});
var client = new ElasticClient(connectionSettings);
var availableToField = Infer.Field<Project>(f => f.Availablity.AvailableTo);
var availableFromField = Infer.Field<Project>(f => f.Availablity.AvailableFrom);
var nameField = Infer.Field<Project>(f => f.Contact.Name);
var active_date_to = new DateRangeQuery
{
Name = "toDate",
Boost = 1.1,
Field = availableToField,
GreaterThan = DateTime.Now,
TimeZone = "+01:00",
Format = "yyyy-MM-ddTHH:mm:SS||dd.MM.yyyy"
};
var active_date_from = new DateRangeQuery
{
Name = "from",
Boost = 1.1,
Field = availableFromField,
LessThanOrEqualTo = DateTime.Now,
TimeZone = "+01:00",
Format = "yyyy-MM-ddTHH:mm:SS||dd.MM.yyyy"
};
var ret = client.Search<Project>(s => s
.Query(q =>
active_date_from &&
active_date_to && q
.Match(d => d
.Query("free text")
)
)
.From(0)
.Size(10)
);
}
public class Project
{
public Availibility Availablity { get; set; }
public Contact Contact { get; set; }
}
public class Contact
{
public string Name { get; set; }
}
public class Availibility
{
public DateTime AvailableFrom { get; set; }
public DateTime AvailableTo { get; set; }
}
Your current query generates
POST http://localhost:9200/projects/project/_search?pretty=true
{
"from": 0,
"size": 10,
"query": {
"bool": {
"must": [
{
"range": {
"availablity.availableFrom": {
"lte": "2017-07-21T10:01:01.456794+10:00",
"time_zone": "+01:00",
"format": "yyyy-MM-ddTHH:mm:SS||dd.MM.yyyy",
"_name": "from",
"boost": 1.1
}
}
},
{
"range": {
"availablity.availableTo": {
"gt": "2017-07-21T10:01:01.456794+10:00",
"time_zone": "+01:00",
"format": "yyyy-MM-ddTHH:mm:SS||dd.MM.yyyy",
"_name": "toDate",
"boost": 1.1
}
}
}
]
}
}
}
If a nameField is added as the field for the match query you get
POST http://localhost:9200/projects/project/_search?pretty=true
{
"from": 0,
"size": 10,
"query": {
"bool": {
"must": [
{
"range": {
"availablity.availableFrom": {
"lte": "2017-07-21T10:02:23.896385+10:00",
"time_zone": "+01:00",
"format": "yyyy-MM-ddTHH:mm:SS||dd.MM.yyyy",
"_name": "from",
"boost": 1.1
}
}
},
{
"range": {
"availablity.availableTo": {
"gt": "2017-07-21T10:02:23.896385+10:00",
"time_zone": "+01:00",
"format": "yyyy-MM-ddTHH:mm:SS||dd.MM.yyyy",
"_name": "toDate",
"boost": 1.1
}
}
},
{
"match": {
"contact.name": {
"query": "free text"
}
}
}
]
}
}
}
Remove InMemoryConnection from ConnectionSettings if you actually want to execute the query against Elasticsearch and see the results.
The range query is a structured query where a document either matches or doesn't match the predicate. Because of this, it can be wrapped in a bool query filter clause which will forgo calculating a score for it and perform better. Because no scoring occurs, boost is not needed.
Putting this together
var availableToField = Infer.Field<Project>(f => f.Availablity.AvailableTo);
var availableFromField = Infer.Field<Project>(f => f.Availablity.AvailableFrom);
var nameField = Infer.Field<Project>(f => f.Contact.Name);
var active_date_to = new DateRangeQuery
{
Name = "toDate",
Field = availableToField,
GreaterThan = DateTime.Now,
TimeZone = "+01:00",
Format = "yyyy-MM-ddTHH:mm:SS||dd.MM.yyyy"
};
var active_date_from = new DateRangeQuery
{
Name = "from",
Field = availableFromField,
LessThanOrEqualTo = DateTime.Now,
TimeZone = "+01:00",
Format = "yyyy-MM-ddTHH:mm:SS||dd.MM.yyyy"
};
var ret = client.Search<Project>(s => s
.Query(q =>
+active_date_from &&
+active_date_to && q
.Match(d => d
.Field(nameField)
.Query("free text")
)
)
.From(0)
.Size(10)
);
You may also want to explore modelling available from and to as a date_range type