lambda.r | Functional programming in R | Functional Programming library
kandi X-RAY | lambda.r Summary
kandi X-RAY | lambda.r Summary
Provides a syntax for writing functional programs in R. Lambda.r has a clean syntax for defining multi-part functions with optional guard statements. Simple pattern matching is also supported. Types can be easily defined and instantiated using the same functional notation. Type checking is integrated and optional, giving the programmer complete flexibility over their application or package.
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Trending Discussions on lambda.r
QUESTION
I'm starting a small project with AWS CDK. I have created a bucket with CDK.
...ANSWER
Answered 2021-May-24 at 13:45In your lambda you can do this
QUESTION
I'm using cdk to add a lambda on edge to a cloudfront web distribution (details see code below).
...ANSWER
Answered 2021-May-16 at 11:25AWS Lambda@Edge functions are ONLY deployed in us-east-1 region. Reference
So you can do 2 things. Try cdk destroy
and deploy again to see if it fixes the problem.
Alternatively create a new version of lambda function and try again. Reference for version of Lambda function is here
Verify your Lambda function is in us-east-1 region to verify the root cause of issue.
QUESTION
How to I define a specific API Gateway endpoint configuration for this stack? I receive the following error when deploying the API gateway resource (apigw.LambdaRestApi): Endpoint Configuration type EDGE is not supported in this region: us-gov-west-1. I found information on the endpointConfiguration property to change the endpoint type, but am struggling with how to define this to update the code successfully. Any help would be greatly appreciated.
...ANSWER
Answered 2021-May-06 at 20:02So just to be clear, you don't want EDGE type endpoint configuration? You want REGIONAL, or perhaps PRIVATE?
https://docs.aws.amazon.com/cdk/api/latest/python/aws_cdk.aws_apigateway/LambdaRestApi.html
Judging by this I think you might just do:
QUESTION
I'm trying to use the AWS CDK to deploy a Lambda function that will be triggered by an S3 upload event. When I try doing cdk ls
or cdk synth
, I get the error:
ANSWER
Answered 2021-May-03 at 23:36Have you tried using the bucket reference using the Bucket and from_bucket_name ?
QUESTION
Experimenting with aws-cdk and it's easy to see how the stack/backend construct class files could get quite large. In this cdk Stack class example (copied and pruned from the aws-cdk api-cors-lambda-crud-dynamodb example) is there an idiomatic way to extract the dynamodb, lambda and apigateway constructor definitions out of the stack class constructor function into separate files? They all take this
as the first argument. I'd like to have a separate file for all the lambda defs, one for the db def, api gateway config, etc that are still referenced inside the main stack class. Is there a way to do this without having to create new classes for each of the definitions?
ANSWER
Answered 2021-Apr-16 at 04:51Yeah you can separate them into their own stacks. 'LambdaStack', 'DynamoDbStack', etc.
Or you can have just separate 'helper' classes if you don't want it directly in the constructor. Here's a simple C# example:
QUESTION
I'm using AWS CDK (node js) to create a lambda function. Below is the definition of my function:
...ANSWER
Answered 2021-Mar-22 at 10:34As lambda role is created inside Function construct. We can use cdk escape hatches to set the path.
You can use below code to set path
or any other variable.
QUESTION
I have some TypeScript code that uses CDK to create an API Gateway and a Lambda. It works and deploys to a standard AWS URL. So far so good.
I now need to transfer the API Gateway so that it operates on a custom domain, so that it can set a cookie in a web app. This is proving far harder, and I suspect I am having difficulty because I am new to TypeScript, AWS, and CDK all at the same time. There are a number of documentation resources on the web, but most would require me to rewrite the precious little working code I have, which I am reluctant to do.
I have created a certificate manually, because that requires validation and thus it does not make sense to create it in code. Other than that I want all other resources to be created by CDK code in a Stack. In my view, it defeats the purpose of CDK if I have to configure things manually.
ProblemThe below code deploys everything I need to gatekeeper.d.aws.example.com
- a HostedZone, an ARecord, a LambdaRestApi and a Function (lambda). However it does not work because the NS records newly assigned to gatekeeper.d.aws.example.com
do not match the ones in the parent d.aws.example.com
.
I think this means that although d.aws.example.com
is "known", the gateway
subdomain cannot delegate to it.
Here is my working code:
...ANSWER
Answered 2021-Mar-17 at 20:23I have consulted two AWS experts, and they do not favour cross-account operations. One said:
This is an anti-pattern, since it requires permissions to remain even after the stack is deployed. What happens if a cross-account operation has to roll back and that permission is revoked? It would result in the app being stuck in a middle/undefined state (the local part is rolled back, but the remote part cannot be rolled back due to an access violation).
The other advised:
Cross-account CDK is hard.
It is much better to split your stacks into two or more operations, so you can run them independently. This applies nicely to "one off" operations like DNS delegation - realistically you are not going to change the zone delegation for your Stack unless you destroy it, which you are not going to do until you actually don't need it. Thus, there is no reason for the zone information to change for the lifetime of the system.
This also works well where you have an app and a database, and you want the ability to take down your app without destroying the data.
So, this is an answer in the sense that some folks will say "don't do it". However, it looks like AWS has the ability to do it, so answers in that direction are still welcome.
QUESTION
I want to get the following example code from https://docs.aws.amazon.com/cdk/latest/guide/serverless_example.html working, but I get a "Argument of type 'Function' is not assignable to parameter of type 'IFunction'" error.
...ANSWER
Answered 2021-Mar-11 at 18:45This error Argument of type 'SomeClass' is not assignable to parameter of type 'ISomeClass'
typically occurs when version of CDK dependencies are at different versions. To solve the issue, we need to bring all the dependencies to same version.
- Delete
node_modules
folder - Delete
package-lock.json
- Ensure all dependencies in package.json are using same version.
- Remove carrot ^ symbol before dependencies for example from "@aws-cdk/aws-lambda": "^1.90.0" to "@aws-cdk/aws-lambda": "1.90.0" , to avoid different minor versions getting installed.
npm install
QUESTION
I have worked with CDK for a couple of months now and I am facing a problem that probably has a simple solution. I have searched the internet for quite some time, without finding a solution. I am creating a lambda function:
...ANSWER
Answered 2021-Mar-02 at 11:13According to the docs, the arn of a function is:
functionArn - string - ARN of this function.
QUESTION
I have used the devhr python lambda function as a model for my Swift Lambda function using Soto for AWS. The Lambda function will be triggered by an S3 event when an image is uploaded to the S3, and using the AWS Rekognition service to add labels (description of objects in the image) to a DynamoDB database. I have problems getting the rekFunction function correct, and I hope someone can advice how to make it work.
The Swift code I have made so far:
...ANSWER
Answered 2021-Feb-28 at 18:37There are a number of issues to cover here.
- As you are triggering this from an S3 Event. The
MyLambda.In
typealias should beS3.Event
and given there isn't anything waiting on the resultsMyLambda.Out
should beVoid
. - You can extract environment variables using
Lambda.env("TABLE")
. - As for writing into your DynamoDB table the best way is probably to use the Soto DynamoDB Codable support. In the example below I will assume your are use a combination of your s3 bucket and key as the key.
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