rowan | Rowan is a library for lossless syntax trees
kandi X-RAY | rowan Summary
kandi X-RAY | rowan Summary
Rowan is a library for lossless syntax trees, inspired in part by Swift's libsyntax. A conceptual overview is available in the rust-analyzer repo. See examples/s_expressions for a tutorial, and rust-analyzer for real-world usage.
Support
Quality
Security
License
Reuse
Top functions reviewed by kandi - BETA
Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of rowan
rowan Key Features
rowan Examples and Code Snippets
Community Discussions
Trending Discussions on rowan
QUESTION
I have two large-ish data frames I am trying to append...
In df1, I have state codes, county codes, state names (Alabama, Alaska, etc.), county names, and years from 2010:2020.
In df2, I have county names, state abbreviations (AL, AK), and data for the year 2010 (which I am trying to merge into df1. The issue lies in that without specifying the state name and simply merging df1 and df2, some of the data which I am trying to get into df1 is duplicated due to there being some counties with the same name...hence, I am trying to also join by state to prevent this, but I have state abbreviations, and state names.
Is there any way in which I can make either the state names in df1 abbreviations, or the state names in df2 full names? Please let me know! Thank you for the help.
Edit: dput(df2)
...ANSWER
Answered 2022-Apr-18 at 03:52Here's one way you could turn state abbreviations into state names using R's built in state vectors:
QUESTION
I am making an app that has information about different woods, herbs and spices, and a few other things. I am including the ability to save their favorite item to a favorites list, so I have a heart button that the user can press to add it to the favorites. Pressing the button toggles the isFavorite property of the item and then leaving the page calls a method that encodes the data to save it to the user's device. The problem that I am running into is that it is not encoding the updated value of the isFavorite property. It is still encoding the value as false, so the favorites list is not persisting after closing and reopening the app.
Here is my Wood.swift code, this file sets up the structure for Wood items. I also included the test data that I was using to make sure that it displayed properly in the Wood extension:
...ANSWER
Answered 2022-Apr-11 at 20:19Your problem is that structs are value types in Swift. Essentially this means that the instance of Wood that you have in WoodsDetailView is not the same instance that is in your array in your model (WoodData); It is a copy (Technically, the copy is made as soon as you modify the isFavourite property).
In SwiftUI it is important to maintain separation of responsibilities between the view and the model.
Changing the favourite status of a Wood is something the view should ask the model to do.
This is where you have a second issue; In your detail view you are creating a separate instance of your model; You need to refer to a single instance.
You have a good start; you have put your model instance in the environment where views can access it.
First, change the detail view to remove the binding, refer to the model from the environment and ask the model to do the work:
QUESTION
I have a large table in SQL with the following columns:
CompanyId(int) Email(Varchar 255) First_Name(Varchar 50) Last_Name(Varchar 50) 1 jim_halpert@dundermifflin.com Jim Halpert 2 bvance@vancerefridgerations.com Bob Vance 1 michael_scott@dundermifflin.com Michael ScottCompanyId can repeat several times as the companies are attached to various emails.
My employer wants me to find Company emails that belong to a specific type. After several IF statements, the end result would print a message like:
"CompanyId" has firstName_lastName@companyName.domain type email
"CompanyId" has firstInitial_lastName@companyName.domain type email
My employers told me to use Cursor to find my solution, but once I start my cursor I need to check the CompanyId to see if that id has already been looped and a type found. If the CompanyId has already gone through the cycle, I want to skip it.
This is my code thus far
...ANSWER
Answered 2021-Nov-03 at 14:06Cursors are slow and inefficient, and are rarely needed.
This doesn't need a cursor at all. A simple filtered join with a group by will suffice
QUESTION
I have a list of team members and a list of 2 substitutes:
team = Samson, Max, Rowan, Flynn, Jack
subs = Struan, Harry
I need to randomly swap the 2 subs into the team. I'm getting stuck because I need to ensure that only these 2 elements are swapped and that both are swapped in. I tried just looping through the subs array and randomly swapping each element with an element from the team array, but too frequently it swapped Struan with Max and then Harry with Struan, so that in the end Struan was still in the subs array and not in the team.
So: I need to exclusively swap the 2 elements in the sub array with random elements from the team array. How can I do that?
ANSWER
Answered 2021-Oct-05 at 19:08This should work:
QUESTION
I have run into a problem were my data is being listed as an object at some point, and then given an error due to being a 'float'
I have columns that are typed as objects right now here:
...ANSWER
Answered 2021-Mar-18 at 05:04Firstly creates a list of columns which contains '%' symbol and whom you want to convert into int:-
QUESTION
I am currently building a react application, and i want to pass the hamburgerToggle prop down to the PortfolioItem component, just as i did with Nav.
The thing is, when i try to do this, i get undefined returned. I think this has to do something with the ReactFullpage and ReactFullpage.Wrapper components. See the code down below. Does anyone know how to fix this?
ANSWER
Answered 2021-Feb-23 at 15:53This seems like a perfect example for useContext() hook, since you need to pass data to several components on different tree levels.
Your code might look like this:
QUESTION
In pandas, I wanted to compare only 3 columns(chosen by name), of the total 8 columns, and get the "Outcome".
- [You will find many similar questions, but 99% of them are irrelavent as they are comparing all the columns in the dataframe, and not just random ones from a larger dataset as it happens in the real world analysis... I want to choose the columns by name which have to be compared]
ANSWER
Answered 2021-Jan-06 at 12:33Try this:
QUESTION
I have a count of stems by tree species for different plots.
...ANSWER
Answered 2021-Jan-05 at 15:21You can use :
QUESTION
hello there is a json data as below.
...ANSWER
Answered 2020-Sep-07 at 12:22What you can do is to use the delete operator when parentID is equal to 0. This will delete the property from the object, hence not displaying it.
QUESTION
Please help me out to create treeview by javascript array. The scenario is I want to create treeview with reverse level. For Example:
...ANSWER
Answered 2020-Aug-19 at 13:09 tree = function(array) {
var o = {
ID: 0
}
function arrGet(o) {
if (Array.isArray(o.children)) {
o.children.forEach(arrGet);
}
}
array.forEach(function(a) {
o[a.ID] = o[a.ID] || {
ID: a.ID,
parentID: a.parentID,
Phone: a.Phone,
City: a.City,
Name: a.Name
};
a.children = o[a.ID].children;
o[a.parentID] = o[a.parentID] || {
ID: a.parentID
};
o[a.parentID].children = o[a.parentID].children || [];
o[a.parentID].children.push(o[a.ID]);
});
arrGet(o[0]);
return o[0].children;
}(arr);
console.log('Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install rowan
Rust is installed and managed by the rustup tool. Rust has a 6-week rapid release process and supports a great number of platforms, so there are many builds of Rust available at any time. Please refer rust-lang.org for more information.
Support
Reuse Trending Solutions
Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items
Find more librariesStay Updated
Subscribe to our newsletter for trending solutions and developer bootcamps
Share this Page
