serval | Simple Scheme interpreter in Python | Interpreter library
kandi X-RAY | serval Summary
kandi X-RAY | serval Summary
Serval is a high-level Scheme interpreter written in Python. It implements a subset of R5RS. The code closely follows Scheme meta-circular evaluator implementation from Ch.4 of the SICP book.
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Top functions reviewed by kandi - BETA
- Evaluate expression .
- Parse a list .
- Main function .
- Parse a token .
- Expand a list of clauses .
- Write a pair .
- Normalize to URL .
- Convert a pair into a list .
- Load expression .
- Perform comparison .
serval Key Features
serval Examples and Code Snippets
Community Discussions
Trending Discussions on serval
QUESTION
in my project I want to add the textinput from a Textfield into a List to build a Listview.builder. The Problem is that I dont know how to add the String to the List (I want to use the string like in a todo app to make serval dates). (for example) time.add(time1) isnt working and I hope someone can help me. Is there a completly other way to transport the Inputtext to the list, Im open for everything
First Page
...ANSWER
Answered 2021-Mar-11 at 12:53There is too much wrong tbh in the code. Let us help you.
Firstly, time.add(time1) is not working because you are everytime creating New HomeScreen after addition and List time is reinitialised again and again. thus adding a value wont work here.
To save data you have to actually put that data somewhere in another class with static reference or may be persist them using sharedprefs/anything but that different case.
for example you can create a class like this
QUESTION
I am dealing a problem that assigns serval numbers in a column to be its corresponding characterized intervals. The intervals and its original values examples are shown below
...ANSWER
Answered 2021-Mar-04 at 17:42have you checked if the cut function would not do just what you want ?
QUESTION
I'm trying to send emails in .NET over SMTP. I linked serval custom aliases to the account in office365. (For example no-reply@domain-a.com, no-reply@domain-b.com)
But the mails arrive from No-Reply@mydomain.onmicrosoft.com. Even if I pass in a custom domain in the "from" parameter.
Here is my code:
...ANSWER
Answered 2021-Feb-22 at 17:48Both Google (GMail) and Microsoft (Office365) replace the From header with the email address of the account used to send the mail in order to curtail spoofing.
If you do not want this, then you'll need to use another SMTP server or set up your own.
QUESTION
I recently added a settings pane to my app, and tried to connect it to core data to let the users mange their api and url settings.
But unfortunately when I launch my app and open the settings pane I alway get a bunch of errors telling me that core data is not connected correctly or something like that. - error messages below
-----------------------------------------
This is my App.swift file where I added the settings pane.
...ANSWER
Answered 2021-Jan-25 at 22:33I finally found a very easy way to solve my problem.
The following code works perfect for me in Xcode 12.3.
To access the PersistenceController.shared we need to connect our view to the "main" PersistenceController.shared, which is called in the App file.
QUESTION
As the title mentioned, I'm confusing about where is the debug info stored in .Framework file.
I googled for serval days, what I gots are:
Framework binary compiled by debug mode will include a debug info segment, to indicate the symbol location. Release mode compiling will move it to a dSYM file.
But, what confused me is, I build a framework with ninja, and it doesn't generate dSYM file. Meanwhile I can't find the symbol location by dwarfdump command or MachOView app. As Regards strings command can get some relative file path results, like ../../flutter/fml/memory/task_runner_checker.cc.
Here dwarfdump prints:
...ANSWER
Answered 2020-Dec-24 at 09:15Debug information on Darwin systems exists in one of two places: In the .o files, and later after dsymutil is run to create a .dSYM, it exists in the .dSYM bundle, all collected together, relocated to the actual binary's addresses.
This was a build-link-debug performance enhancement. Linking all of the debug information -- updating all the symbol addresses, copying it all around -- is very slow, so leaving the debug information in the .o files for this common iterative development cycle, and having the debugger locate the .o files and update the addresses of the functions internally, allows for rapid development.
Leaving all of the debug information in the .o files requires that they all be present, of course! And at the same file paths. So it is not good when you need to move a binary between computers, or save it for later debugging. For these cases, you link the debug information with dsymutil and you get a .dSYM bundle.
QUESTION
I'm trying to upload product to my PHP upload system, that includes multiple variables, images among them.
I'm using ajax function to transfer string variables and newForm() (that related to images fetched from input[type="file"]). The main goal is to upload the image and strings in upload.php file using the data I'm fetching from ajax.
But there are troubles transfering the image value, once I send all the data together (including images) the system fails to transfer the data, because I'm forced to use processData: false, otherwise it fail to run the ajax function.
This attribute blocks the entire data transfer to my PHP file.
How can I over come processData: false influence, and transfer multiple strings and newForm() using AJAX to upload.php file?
AJAX:
...ANSWER
Answered 2020-Jun-05 at 18:36Here, I would use only one instance of the FormData class.
QUESTION
I am new to the database and am following tutorials and doing experiments. So my apology if that question turned out to be stupid.
I set up a table like that:
...ANSWER
Answered 2020-Oct-18 at 19:47when you separately inserts rows one by one, for the second insert already sees 111 row and it doesn't violate the FK but when you are loading a file it tries to insert all rows in one batch ( transaction) , so row 111 doesn't exists just yet.
QUESTION
I using https://github.com/cloudposse/terraform-aws-acm-request-certificate to generate certificate using terraform and aws.
I want to run this module on serval domains: "example.com", "cdn.example.com"...
I don't want to use subject_alternative_names for cdn.example.com because it will be appear on the subject field inside the certificate, and when everyone open the certificate I don't want to him to see cdn domain.
For cdn.example.com I want a new certificate.
So I try to run terraform apply with my code below but I getting errors:
Error: no matching Route53Zone found
on .terraform\modules\acm_request_certificate_example\main.tf line 19, in data "aws_route53_zone" "default": 19: data "aws_route53_zone" "default" {
Error: no matching Route53Zone found
on .terraform\modules\acm_request_certificate_cdn_example\main.tf line 19, in data "aws_route53_zone" "default": 19: data "aws_route53_zone" "default" {
I can't run more than more module? How to solve it anyway?
main.tf
...ANSWER
Answered 2020-Sep-20 at 05:59Based on the comments.
The issue was caused by using process_domain_validation_options = true. This checks if the hosted zone exists in Roure53 prior requesting a certificate. This is done to enable automated validation of the SSL certificate to be issued.
Since in the OP's case SSL certificates are requested for domains without corresponding zones, the terraform was erroring out.
The solution was to use process_domain_validation_options = false, but this requires manual validation procedure for the SSL to be issued. To automation of this procedure must be done through a custom solution. In very broad terms, such solution could involve created required record for the validation using aws_route53_record, a lambda function or local-exec provisioner to created needed records.
QUESTION
I am new to flutter, and I am working on a project, and I am limited in time.
So, I am facing this problem, the Texfields are not updating their values after calling the "getuserinfo" function.
I tried serval solutions, but none of them worked for me.
What I want to do is building the view after getting the required data from the future function. Am I missing something? Here is my code:
...ANSWER
Answered 2020-Sep-10 at 22:53Move the setTextFields method from the initState because your future might not be done, Instead, call the setTextFields method in the FutureBuilder.
I added a demo using your code as an example:
InitState:
QUESTION
I have a viewmodel with multiple counters which are used in serval methods. In the view model there is also a collection of class MenuItem which holds information the create the dynamic menuitems in the ribbon. On some of those menuitems i want to display the counter through a badge.
But to do this i need the bind the badge to the counter property. In my menuitem class i have the path for the binding, but how can i thell my menuitem template to bind to the path it has in it's own binding.
Examples are simplified
...ANSWER
Answered 2020-Aug-07 at 16:50You cannot bind the Path property in the Binding markup extension, it is not a DependencyProperty.
You could identify the target counter with e.g. a Counter property of type int. Apply a Style to your TextBlock with triggers that provide the bindings to the corresponding counter properties on the ViewmodelSample. You need a RelativeSource binding as the counters are in the parent DataContext.
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Vulnerabilities
No vulnerabilities reported
Install serval
Using buildout (useful for local development and testing) $ cd serval $ python bootstrap.py $ bin/buildout Run the interpreter's REPL $ bin/serval
Using pip or easy_install (no need for sudo if using virtualenv) $ sudo pip install serval (or run alternatively easy_install: `$ sudo easy_install serval`) Run the interpreter's REPL $ serval
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