dak | Static type checker using Hindley–Milner type signatures
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Static type checker using Hindley–Milner type signatures
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QUESTION
I am doing a project that let the students add books. And for these books there is quantity that shows how much quantity do the library have of a selected book. So my question is that When Book quantity have (0) value I want the book to be hidden from the dataGridView so student can't see it.
How do hide the row of the book that has 0 value?
C#, WPF, SQL
Best Regards
Omar Dak Elbab
...ANSWER
Answered 2021-May-15 at 18:42simple where
:
QUESTION
I have a dataframe that I'm importing from a text file. The file is organized where certain columns include multiple pieces of data separated by comma. In effect, for certain indices in the df the column value is a list. However pandas isn't reading the data as such, rather as a string that happens to include commas. (Example in the MRE below)
What I ultimately want to do is use df.explode
to expand these columns into separate rows but first I need to get pandas to recognize the data as a list. Obviously I could loop through the whole df but there's got to be a vectorized solution here.
Sample code:
...ANSWER
Answered 2021-Apr-04 at 12:54IIUC, you can convert your Visit2 to Visit with str.split()
:
QUESTION
We have a process that imports jira data into an oracle database for reporting. The issue I am having at the moment is extracting custom fields and converting a row into a column in oracle.
This is how I am extracting the query, the problem here is that the performance just does not scale.
...ANSWER
Answered 2021-Feb-11 at 11:46To really understand where the bottleneck is we'd need to get an execution plan and info about indexes that exists, at least.
Assuming you have indexes on issue_id
and project
in both tables, what I'd try next is to get rid of the 3 separate selects and join your jira_data to pivoted jira_custom_fields
QUESTION
I am playing around with some NFL data and I have a column in a dataframe that looks like:
...ANSWER
Answered 2020-Sep-17 at 04:34This might help.
QUESTION
Hello every one i have a dashboard that has a menu of all the components : i want when i m logged in with the role admin i want to display all the components and if i m logged with the responsable role i want to show just the commandes component
i don t know what to add in my guard to do this
this is my menu.ts import { MenuItem } from "./menu.model";
...ANSWER
Answered 2020-Sep-11 at 03:07i don t know what to add in my guard to do this
Route guards prevent accessing a particular route if conditions are not met. They will not prevent the display of route links(anchors).
If you are trying to hide the route links, you will need to hide the display of the route links through maybe *ngIf or [hidden] or some other way. If your route links are coming from an array, the array should only contain route links that are available to the current user role.
QUESTION
I start with a pandas dataframe of historical places. I pass a column of place names to geopy for geocoding. I extract the coordinates, and turn them into points. I also save the geocoder's returned geopy.location.Location in a column for further use. This all seems to work fine if I run it on the whole (geo)dataframe.
The problem arises when I want to overwrite a few of the entries. For instance, I want to overwrite wherever the geocoder has tried and failed to locate 'Fargo N Dak' (the historical abbreviation) correctly. I can re-run the geocoder on a single, modernized place name and extract the data, but I can't figure out how to insert it in the original gdf.
...ANSWER
Answered 2020-Jul-09 at 11:22I guess it's due to how you are indexing your GeoDataFrame. When you are doing
gdf.loc[gdf.rawPOB == 'Fargo N Dak', '_TEMP']
you get a pandas.Series in return (because you are using the boolean indexing with gdf.rawPOB == '..'
). So you can't do the assignement your are trying (and should get an error like ValueError: Must have equal len keys and value when setting with an iterable
which isn't that helpful).
What I suggest is that you reindex your GeoDataFrame using your rawPOB
column, then you will be able to easily set/get a value for a specific pair of (index, column name) using the DataFrame.at
method like so :
QUESTION
Hi I am using the following code:
...ANSWER
Answered 2020-Aug-04 at 16:17You have forgot to add connection.execute("select * from data")
Here is the correct code
QUESTION
I am working on a project in which a user selects 1 choice from 3 random options. There are twenty total rounds of this. I set the "draft" or selection up on one file, where the rounds are separated into divs and when the user picks an option from the first round, then that round disappears and a new round appears using "display:none." I recently added localStorage commands to the file, and ever since I did this, the code no longer successfully switches from round to round. When a selection is made, it stays on the same round and the "display:none" command does nothing. What should I do differently?
Here is the JS file:
...ANSWER
Answered 2020-Jul-24 at 23:36The HTML and the Javascript provided here are incomplete, but the most likely cause I can think of is if your HTML document didn't contain elements with the IDs of:
- overall
- cumovr
- qbTeam
I had to add these as well as as a shuffle method and "showTeam" and qbselect2 and qbselect3 in order to get the example to run. Once I did that, it worked, so it seems to me that you probably have errors in your console relating to one of the elements above, which is stopping the execution of your Javascript method BEFORE the display:none is reached.
EDIT: Sorry, yes I also had to add a the data for the half-backs and allow the team selection block to be initially visible and remove the stray brace. I think you may have damaged the code in trying to reduce it for this example.
QUESTION
I am working on a project in which I have three arrays and an element in one array corresponds to the element in the other arrays with the same index. I find a random element of one array by generating a random number, but when I search for the elements in the arrays with this random number as the index, they don't correspond. How can I make them correspond?
...ANSWER
Answered 2020-Jul-19 at 06:32You are only removing the randomly selected index from one of the arrays. You should do that also for the other two:
QUESTION
I am trying to store all the information from the td tags that have width="82"
or maybe there is a more efficient method.
ANSWER
Answered 2020-Jul-01 at 18:47You can .extract()
the tables with widht="100%
from the soup and then get all rows.
For example (txt
contains your HTML snippet from the question):
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