lambda

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Using a lambda for a model default in Web2py

I\'m try to use a lambda to set a default value based on a value in another table. Here is my model: db.define_table(\'trip_instance\', timestamp, sos_table,[详细]

2023-04-02 17:31 分类：问答
C# Explanation about a lambda expression

I just found this lambda expression: myCustomerList.GroupBy(cust => cust.CustomerId).Select(grp => grp.First());[详细]

2023-04-02 12:04 分类：问答
How do I dynamically create an Lambda Expression

How to I crate Expression Tree dynamically that looks somet开发者_运维知识库hing like... p => new { p.FAMILY, p.CACHE_FAMILY, p.CUSTOMER_CODE, p.CCC, p.OPERATION, p.EVAL_CODE, p.VDT_FLAG, p.TEST_P[详细]

2023-04-02 10:32 分类：问答
Correct way to write a LINQ or Lambda to retrieve items with a matching supplier ID

Given the following classes Product - int ProductID - Supplier[] Suppliers ... Supplier - int SupplierID - string SupplierName[详细]

2023-04-02 00:39 分类：问答
Problems with nested lambdas in VC++

Does anyone know why this code is not compilable with VC++ 2010 class C 开发者_运维技巧{ public: void M(string t) {}[详细]

2023-04-01 18:22 分类：问答
Lambda expression for querying an array of KeyValuePairs using Expression<Func<T, bool>>

I have an array of KeyValuePairs like this: KeyValuePair<long,int>[] orderItems; The \'long\' component of this KeyValuePair corresponds to an Id (primary key) value on a database table.[详细]

2023-04-01 07:36 分类：问答
Using Extension methods versus lambda expression in c#

Suppose I have an extension method public static IEnumerable<Product> Filter( this IEnumerable<Product> productEnum,[详细]

2023-04-01 05:56 分类：问答
Boost lambda::_1 in C++ 0x

int main() { std::vector<int> v; v.push_back(1); v.push_back(3); v.push_back(2); std::for_each(v.begin(), v.end(), std::cout << boost::lambda::_1 << \"\\n\");开发者_高级运维[详细]

2023-03-31 19:59 分类：问答
Better way to write this method using lambda expression and generics

I need a method for retrieving data from an IDataRecord without using the annoying \"magic strings\" to express field names.[详细]

2023-03-31 19:50 分类：问答
Create method with unlimited expression parameters?

I have created a repository method with the following signature: T Get<TProperty>(int id, Expression<Func<T, TProperty>> include)[详细]

2023-03-31 05:53 分类：问答