ask | interactive command-line prompts for deno | Command Line Interface library
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interactive command-line prompts for deno
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QUESTION
I am new in Python, I would like to ask how can make my code work. in login() function, if the username and password are correct, log = True, then when go to main() function, log variable is not defined.
Then i found online where add log = login() in main() function, like this
...ANSWER
Answered 2021-Jun-15 at 06:55I modified your code.this will works fine
but the customerMian() and adminMain() function not defined.
QUESTION
I understand that after calling fork() the child process inherits the per-process file descriptor table of its parent (pointing to the same system-wide open file tables). Hence, when opening a file in a parent process and then calling fork(), both the child and parent can write to that file without overwriting one another's output (due to a shared offset in the open-file table entry).
However, suppose that, we call open() on some file after a fork (in both the parent and the child). Will this create a separate entries in the system-wide open file table, with a separate set of offsets and read-write permission flags for the child (despite the fact that it's technically the same file)? I've tried looking this up and I don't seem to be able to find a clear answer.
I'm asking this mainly since I was playing around with writing to files, and it seems like only one the outputs of the parent and child ends up in the file in the aforementioned situation. This seemed to imply that there are separate entries in the open file table for the two separate open calls, and hence separate offsets, so the slower process overwrites the output of the other process.
To illustrate this, consider the following code:
...ANSWER
Answered 2021-May-03 at 20:22There is a difference between a file and a file descriptor (FD).
All processes share the same files. They don't necessarily have access to the same files, and a file is not its name, either; two different processes which open the same name might not actually open the same file, for example if the first file were renamed or unlinked and a new file were associated with the name. But if they do open the same file, it's necessarily shared, and changes will be mutually visible.
But a file descriptor is not a file. It refers to a file (not a filename, see above), but it also contains other information, including a file position used for and updated by calls to read
and write
. (You can use "positioned" read and write, pread
and pwrite
, if you don't want to use the position in the FD.) File descriptors are shared between parent and child processes, and so the file position in the FD is also shared.
Another thing stored in the file descriptor (in the kernel, where user processes can't get at it) is the list of permitted actions (on Unix, read, write, and/or execute, and possibly others). Permissions are stored in the file directory, not in the file itself, and the requested permissions are copied into the file descriptor when the file is opened (if the permissions are available.) It's possible for a child process to have a different user or group than the parent, particularly if the parent is started with augmented permissions but drops them before spawning the child. A file descriptor for a file opened in this manner still has the same permissions uf it is shared with a child, even if the child would itself be able to open the file.
QUESTION
Sorry I don't show my variables or anything, tried to give information only pertaining to the questions. This 1 Sub is huge.
Currently my code allows a user to select multiple files, the files selected will be sorted in a specific format, then loaded into 2 different arrays. Currently loads Columns D:E into 1 array and Columns I:K into another array (from selected files QSResultFileWS
, and returns those arrays to my destination FormattingWS
. I'm still trying to learn arrays so if the methodology I used to do this isn't proper, be gentle.
ANSWER
Answered 2021-Jun-14 at 23:12You can use the FILTER
function to remove the blanks.
Replace you lines load the arrays
QUESTION
I am creating a dictionary with "Full Name": "Birthday" for numerous people as an exercise. The program should ask "Who's birthday do you want to look up?" I will input a name, say "Benjamin Franklin" And it will return his birthday: 1706/01/17.
Alright, the problem I am encountering is name capitalization. How can I input "benjamin franklin" and still find "Benjamin Franklin" in my dictionary? I am familiar with .lower() and .upper() functions, however I am not able to implement them correctly, is that the right way to approach this problem?
Here is what I have
...ANSWER
Answered 2021-Jun-15 at 19:48Probably the most straight forward way I can think of to solve this is the following:
QUESTION
I have a text file called listofhotelguests.txt where hotelguests are stored line by line with their first names separated by && as a delimiter. Can someone explain how I can have my Python program read it so it associates john with doe, ronald with macdonald, and george with washington?
My expected outcome I'm hoping for is if I prompt the user for their lastname to make sure their a valid guest on the list, the program will check it against what it has in the file for whatever the firstname they entered earlier was.
So if someone enters george as their first name, the program retrieves the line where it has george&&washington, prompts the user to enter their lastname and if it doesn't match what it has, either say it matches or doesn't. I can figure the rest out later myself.
Assuming there is nobody with the same names.
I know I have to split the lines with &&, and somehow store what's before && as something like name1 and whats after && as name2? Or could I do something where if the firstname and lastname are on the same line it returns name1 and password1?
Not sure on what to do. Python is one of my newer languages, and I'm the only CS student in my family and friend groups, so I couldn't ask anybody else for help. Got nowhere by myself.
Even just pointing me in the direction of what I need to study would help immensely.
Thanks
Here's what the text file looks like:
...ANSWER
Answered 2021-Jun-15 at 19:30Here's a solution:
QUESTION
Hi i want to ask about searchbar in django, i want to create something like if there is no results to show, show all or back to homepage. And my question is how to do it ?
Here is my code:
views:
...ANSWER
Answered 2021-Jun-15 at 17:31Something like this should work
QUESTION
How to get the return value? Attach my code. My intention: Want to check the QListWidget and if it's empty, a message Box popup will raise and ask the option from the user. Problem: At the stage of beginning itself, a Message box popup will display, (I don't want it at the beginning stage), If the QListwidget is empty then the MessageBox popup will display as desired, and if we select "Yes" or " No" Button, Nothing will return/print in the first file. How to resolve?
Main
...ANSWER
Answered 2021-Jun-15 at 16:49In first it is not necessary to make the verification be done in a new class, it is also logical that you invoke func_create_newitem since as you point out that method must be invoked when the item was not found.
QUESTION
I'm making a POC with Lumen and Vue.JS. For now it just has to send a "hello world" message from the Lumen back-end to the Vue.JS front-end (which works). I have made an event which is triggered upon loading the page like this:
...ANSWER
Answered 2021-Jun-15 at 16:42Fix composer.json
I have created an issue on the PHP package: https://github.com/pusher/pusher-http-php/issues/295
It is true this version is broken, but the fix should be in the composer.json
file. Mine looked like this:
QUESTION
I know this question has been asked multiple times but I cannot seem to find an answer. I have a component named DynamicTable which renders JSON as a data table. It has been tested in multiple other pages and works correctly. Here I have put it into a React-Bootstrap tab container. The data pull works correctly but the page is not re-rendering when the fetch is complete.
Here is the code I am using
...ANSWER
Answered 2021-Jun-15 at 15:00It looks like you have problem in mapStateToProps
QUESTION
I am trying to divide merged information from one cell into separate cells.
one cell:
amount:2 price:253,18 price2:59,24 EU status:WBB NAS MRR OWA PXA min:1 opt:3 category: PNE code z:195750divided data: (I want to export each part into another cell)
amount:2 price:253,18 price2:59,24 EU status:WBB NAS MRR OWA PXA min:1 opt:3 category: PNE code z:195750I can't simply divide by finding empty space, status cell which is case-sensitive | status:WBB NAS MRR OWA PXA| has a different data range with spaces that can't be divided.
Split ( expression [,delimiter] [,limit] [,compare] )
...ANSWER
Answered 2021-May-24 at 11:44As the order is the same one way is to simply search for adjacent key names & parse out whats in-between:
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