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QUESTION
I have a file which contains a POSTCODE column. A UK postcode typically looks like SW1A 0AA
with that space in the middle.
I know I can use drop_duplicates()
to get unique values but I want that to apply to only the first part of the postcode (i.e., the SW1A
part). I can probably manage it but converting it to a list then doing some string slicing e.g., .split(' ')[0]
, then getting the unique values but that seems overly cumbersome. So I wonder if there's a nicer way of doing this?
What I have so far is:
...ANSWER
Answered 2021-Jun-15 at 11:58You can extract the first word by .str.extract()
with regex (\w+)
and get the unique values by .unique()
before conversion to list, as follows:
QUESTION
I have a custom UITextView class that initializes a new TextView. The delegate of this class is itself as I need code to run when the text is changed, the delegate method runs. Here is that class.
...ANSWER
Answered 2021-Jun-15 at 04:34// This is the instance that you should assign secondDelegate for
textField = TextView(hintText: "Type a message")
// Not this one, this one never gets added as a subview
let test = TextView()
test.secondDelegate = self
// The fix is here
textField.secondDelegate = self
self.addSubview(textField)
QUESTION
I am learning flutter, and I would like to know how to pass a variable or a method between 2 different files (to add additional widgets). In my example, I took the code provided by flutter when we create a new project, to this code, I added a second file called "second.dart" in which I get the variable "_counter" in the file main "main.dart" which I multiply by 10.
main.dart
...ANSWER
Answered 2021-Jun-11 at 17:46There are some points that you should do in your codes:
when we use underscore as the first character of the variable name, it means that this variable is private! so you can not use
int counter10 = _MyHomePageState._counter * 10;
in the second widget!if you want to pass variables to the child widget, you need to create a constructor as follow:
QUESTION
In a simple test project at Github I am trying to display a Menu with 3 languages and the flags to allow users select the localization:
...ANSWER
Answered 2021-Jun-11 at 22:16You can get the nice string from your labels
dictionary. Here is the working version:
QUESTION
I'm trying to transform a pandas Series like:
Date Value 2020-01-01 -1175 2020-01-02 -475 2020-01-03 1945 2020-01-06 -1295 2020-01-07 -835 2020-01-08 -785 2020-01-09 895 2020-01-10 -665into a pandas DataFrame like:
date 0 1 2 3 4 2020-01-01 -1175 -475 1945 -1295 -665 2020-01-02 -475 1945 -1295 -835 -785 2020-01-03 1945 -1295 -835 -785 895 2020-01-06 -1295 -835 -785 895 -665Every 5 (or n) rows of the Series forms one row in the DataFrame.
Sample data along with my current (ugly but working) code is as follows:
...ANSWER
Answered 2021-Jun-08 at 20:21Try with sliding_window_view
from numpy
:
QUESTION
For the past day, I had a hard time coming up with a simple piece of code just to add some items to a ListView using a button. I wanted to create a list in my app and add items to this list simply by clicking a FloatingActionButton.
The problem was that when I clicked the button, nothing happened. But then when I HotReloaded the app, items magically appeared in the list (code block 1).
After some research, I found a simple solution that worked perfectly. I just wrapped the items in a Column widget and everything worked fine. But I cannot explain why. How is this working? What part of my initial code was wrong? Is this related to how the setState()
method works? How does setState()
work exactly??
My initial code:
...ANSWER
Answered 2021-Jun-08 at 09:12It's kind of buried in the documentation, but you can find it here:
https://api.flutter.dev/flutter/widgets/ListView/ListView.html
Like other widgets in the framework, this widget expects that the children list will not be mutated after it has been passed in here. See the documentation at SliverChildListDelegate.children for more details.
In Android Studio, if you hover over children:
, then it will show this same documentation.
Instead, you need to use a ListView.builder
:
QUESTION
I want to know how to use the highcharter
-package to create parallelplots. I already found an implementation in the MASS
-package, but this doesn't look nice. It results in
ANSWER
Answered 2021-Jun-06 at 22:27library(highcharter)
library(purrr)
library(dplyr)
series_lst <-
iris %>%
as_tibble() %>%
asplit(1) %>%
imap(~list(
name = paste("observation", .y),
data = as.numeric(.x[1:4]),
color = "steelblue"
))
hc <-
highchart() %>%
hc_chart(parallelCoordinates = TRUE, type = "spline") %>%
hc_xAxis(categories = names(iris)[1:4]) %>%
hc_add_series_list(series_lst)
QUESTION
I'm refactoring my code from one big browser javascript file into a nicer node JS structure, with webpack, and I'd really like to be able to import the OpenLayers node module into my node scripts.
My JS files and package.json are stored in /mymodule
, and the node_modules folder for my project is in /node_modules
- I have a symlink set up to /mymodule
from /node_modules/mymodule
. My /mymodule/index.js
file loads a bunch of other files into which I've been refactoring my code from my original browser javascript.
This is my package.json:
...ANSWER
Answered 2021-Jun-05 at 23:12Your code is mixing ESM and CommonJS, unfortunately you can not use both, you must use one or the other.
You want to use the Export keyword rather than module.exports/exports
QUESTION
I have a
which is not a very nice word-breaking.
How to ask the browser to do "nicer" breakings instead?
Example: Internationali-sation or -tion or -on but not n
alone in the next line.
Here is how to reproduce the problem (I've hardcoded 260px
here just to reproduce what I've seen on my device, but this is not really hardcoded in my code):
ANSWER
Answered 2021-Jun-03 at 11:04Well you could prevent breaking altogether...
QUESTION
This shows what I am trying to do
...ANSWER
Answered 2021-Jun-03 at 14:56For example
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