lambda

问题 I am trying to achieve an update operation using my API method to update the content of the table. I have following lambda code set up: def lambda_handler(event, context): param = event['queryStringParameters']['employeID'] name = event['queryStringParameters']['employeName'] dynamodb = boto3.resource('dynamodb', region_name="us-east-1") table = dynamodb.Table('api_demo_employe') response = table.update_item( Key = { 'employeID' : param } ) I need to figure out how can i set the

问题 I am trying to have two eachPixel functions. One returns an image, and the other returns nothing. I'm getting "call to eachPixel is ambiguous" even though I am specifying the return type of the lambda. How can I resolve the ambiguity? // this one does not return an image void eachPixel(const QImage &image, const std::function <void (uint)>& pixelFunc, const QRect &bounds=QRect()) { ... for (int y=region.y(); y<=region.bottom(); y++) { for (int x=region.x(); x<=region.right(); x++) { pixelFunc

问题 We’ve got an EF6 MVC3 codeFirst-site. Our Events may have a collection of EventRallies . And the EventRallies may have a collection of EventOccasions I want to order them so that events with any future occasions is at the top, followed by events where all occasions are in the past, and then events that doesn´t have any rallies or occasinons tied to them. The following attempt results in an :System.ArgumentException: DbSortClause expressions must have a type that is order comparable- error ;)

问题 Somebody that could point me into the right direction in order to simplify the following code using switch statement? var indicators = db.Sses .GroupBy(x => x.Estado) .Select(x => new IndicatorViewModel { Count = x.Count(), IndicatorType = x.Key.ToString(), IndicatorClass = EstadoServicio.Nuevo == x.Key ? "bg-red" : (EstadoServicio.Proceso == x.Key ? "bg-yellow" : (EstadoServicio.Aprobación == x.Key ? "bg-aqua" : "bg-green")) , IconClass = EstadoServicio.Nuevo == x.Key ? "fa-bookmark-o" :

问题 Somebody that could point me into the right direction in order to simplify the following code using switch statement? var indicators = db.Sses .GroupBy(x => x.Estado) .Select(x => new IndicatorViewModel { Count = x.Count(), IndicatorType = x.Key.ToString(), IndicatorClass = EstadoServicio.Nuevo == x.Key ? "bg-red" : (EstadoServicio.Proceso == x.Key ? "bg-yellow" : (EstadoServicio.Aprobación == x.Key ? "bg-aqua" : "bg-green")) , IconClass = EstadoServicio.Nuevo == x.Key ? "fa-bookmark-o" :

问题 I am trying to write some code that will send the value of an Entry box to a function based on a binding. I can technically get the behavior I want in the code below, but I'm a) not sure why it works and b) am quite sure I am not doing this in the most pythonic way. I'm pretty sure I'm misunderstanding the event or lambda or both. In the code below the Entry box called input_box1 when the binding triggers, the inp_var1.get() code only gets the default value, not anything that has been entered

问题 I have been trying for the past days to publish a sns however no matter what i code i just cant get it to send. Be aware i am not a coder, i just do this for fun. I have set up an IAM policy and rule as below and ran it with the policy simulator and it works fine. { "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Action": "sns:Publish", "Resource": "arn:aws:sns:us-east-1:*******:CallBell" } ] } i have this at the beginning of my code. var AWS = require("aws-sdk"); var sns = new

问题 This question is about fun() vs a lambda block definitions and scopes. i have tried define the expressions in two ways. Here is what i have tried: val myFunction = fun(){ println("i am in a function") } //but i also tried doing this: val myFunction = { println("i am in a lambda") } my problem is i do not know if they are equivalent and same thing ? 回答1: The differences are best described in https://kotlinlang.org/docs/reference/lambdas.html#anonymous-functions: Anonymous functions allow you

问题 This question already has answers here : Why are only final variables accessible in anonymous class? (15 answers) Closed 3 years ago . I just saw this question, and apparently it's obvious that Java should deny access to non-final variables inside the body of a lambda expression. Why? Edit: for example, I don't see why the following code is harmful: String[] numbers = new String[10]; // put some numerical strings in BigInteger sum = new BigInteger("0"); numbers.forEach(n -> sum = sum.add(new

问题 I am trying to build the PostgreSqlGeneration code from this repository on Mono. Unfortunately I get an error I do not understand. In the PostgreSqlMigrationSqlGenerator class the following method gives the build error "delegate System.Action does not take `1' arguments": private void GenerateStatements(IEnumerable<MigrationOperation> migrationOperations) { Check.NotNull(migrationOperations, "migrationOperations"); DetectHistoryRebuild(migrationOperations).Each<dynamic>(o => Generate(o)); //