expression

问题 Can someone please help me understand how to call this JS function expression var math = { 'factorial': function factorial(n) { if (n <= 1) return 1; return n * factorial(n - 1); } }; 回答1: Here you go. Should be self-evident: var math = { 'factorial': function factorial(n) { if (n <= 1) return 1; return n * factorial(n - 1); } }; var result = math.factorial(3); // For the purposes of illustration, we will use document.write to output // the result. document.write is generally not a good idea,

问题 I want to create a generic validation class, so I can do something like: Validation v = new Validation(); v.AddRequired(x => this.Name); v.AddRange(x => x.this.Age, 5, 65); I'm unsure as to how to write the method definition and make the evaluation? Where AddRequired would take a string and AddRange would take a numeric type ( int , primarily but also double , decimal , etc) 回答1: An approach would be: class ObjectToBeValidated { public string Name { get; set; } public int Age { get; set; } }

问题 It is a long story ): I have some types look like this: public class Model { private readonly SomeType _member; private readonly AnotherType _member2; public Model(SomeType member, AnotherType member2) { _member = member; _member2 = member2; } public SomeType Member { get { return _member; } } public AnotherType Member2 { get { return _member2; } } } I'm trying to create some expressions to create an instance of class, reads properties from some other objects (anon objects usually), and write

问题 I have 2 files one is in qliksense and other is in power bi .. both have same tables and relationships.. qliksense expression is if([Billing Doc. currency_WAERK] = 'USD', sum({<[Billing Type_FKART] -={'ZG2','ZL2'}>}[Billing Sales Amount_NETWR])*139.2, sum({<[Billing Type_FKART] -={'ZG2','ZL2'}>}[Billing Sales Amount_NETWR])) and power bi expression is UPDATED Total Sales Variable = CALCULATE ( SUMX ( VALUES ( test_billing_doc_header[Billing Doc. currency_WAERK] ), IF ( test_billing_doc_header

问题 I've a FilterAsync method to do the query with where clause and includes the navigation properties. Below is the method for the FilterAsync. public async Task<IQueryable<T>> FilterAsync<T>(Expression<Func<T, bool>> predicate, params Expression<Func<T, object>>[] includes) where T : class { return await Task.Run(() => { //Return first 250 records/objects from var query = _context.Set<T>().Where(predicate).AsQueryable().Take(250); return includes.Aggregate(query, (current, includeProperty) =>

问题 All, I have a query called "WCR_Q" and a report called "WCR_R" based off of this query. My report is filtered based off a record selection from a form. When I use the expression =Count[FacilityID] becuse I get a total number of records in the query instead of the total number of records as displayed in my report. The query has (6) records for [FacilityID] but there's only (2) [FacilityID] in my report. This is due to the query having duplicates. I need an expression formula to place in my

问题 I have a variable set as <set-variable variableName="productIdvar" value="#[xpath://productId]" doc:name="Variable" /> On logging its coming right, I want to use the value of the variable productIdvar in my xpath expression, <when expression="//*[local-name()='itemid']=?" evaluator="xpath"> or <when expression="#[xpath://*[local-name()='itemid']=?]"> What should i use in place of ? to get the value of the variable? Thanks Rahul. 回答1: The following expression should work for you. <when

问题 Ok so here is the example query: SELECT DISTINCT id, amount FROM tbl_recurring_payment AS t WHERE ADDDATE(t.start_date, INTERVAL (t.period) UPPER(t.unit)) = CURDATE()); The area in question is UPPER(t.unit) where I want that expr to be treated as a mysql keyword (possible values of this column are day, week, month, year). It throws an error since it cant use the expr as a keyword. Is there anything I can do to get this to work or should I just add a check for the unit and hardcode the keyword

问题 How do I change a label's colour (for example labelname = myLBL) programmatically? Thanks Andy 回答1: Ehrm... how about: myLBL.Foreground = Brushes.Black; 来源： https://stackoverflow.com/questions/3712938/how-do-you-change-the-text-colour-of-a-label-programmatically-in-microsoft-expre

问题 Essentials of Programming Languages says References are sometimes called L-values. This name reflects the association of such data structures with variables appearing on the left-hand side of assignment statements. Analogously, expressed values , such as the values of the right-hand side expressions of assignment statements, are known as R-values . while https://course.ccs.neu.edu/csg111/lectures/lec06.html from a course based on the book says References are sometimes called L-values because