line-by-line | NodeJS module that helps you reading large text files | Document Editor library
kandi X-RAY | line-by-line Summary
kandi X-RAY | line-by-line Summary
is a NodeJS module that helps you reading large text files, line by line, without buffering the files into memory.
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QUESTION
In the "Platforms State of the Union" video of WWDC2021 at 28:00 it was mentioned that
[Apple] even added support for asynchronously iterating line-by-line through a file
in Foundation for macOS 12/iOS 15 and Swift 5.5.
What is that new API, how can I now asynchronously iterate line-by-line through a file?
...ANSWER
Answered 2021-Jun-10 at 11:47The main thing they added that enables this, is AsyncSequence
. AsyncSequence
is like Sequence
, but its Iterator.next
method is async throws
.
Specifically, you can use URLSession.AsyncBytes.lines
to get an AsyncSequence
of the lines in a file.
Suppose you are in an async throws
method, you can do:
QUESTION
I have written a perl
script to read an input file line-by-line for a given search string. I have done two implementations using the inbuilt perl
functions grep
and index
, but I'm not able to get the output for the exact string match.
My sample code, input file and the desired output is shown below. Please help me understand the issue with this script which can help me to get the required output.
SAMPLE_CODE
...ANSWER
Answered 2021-Jun-07 at 15:32Your problem is that the matching you are doing, both grep /$var/
and index($line, $var)
allows for lines to match partially. I.e.
QUESTION
I am trying to read files using Common Lisp with-open-file
. In my environment, I am using SBCL, Emacs, and Slime.
I can open files like this one (bookmarks-to-read.lisp) using:
...ANSWER
Answered 2021-Jun-06 at 08:54Package HISTORY-TREE does not exist
That message is clear: the package HISTORY-TREE
does not exist. But you try to read symbols into this non-existent package, for example HISTORY-TREE:OWNER
.
Every package which is mentioned in a printed symbol in that file needs to exist, before one can successfully read the file.
The default Common Lisp reader does not create packages on the fly by just reading symbols.
Example:
QUESTION
First time trying to make an HTML/CSS Django website, thank you for the patience. I'm working from a simple resume template and trying to fix an error I found from the start (template in question https://github.com/resume/resume.github.com/tree/47aba3b380459c07967b4f38c9e77fbe42be07a6).
I have a section of my section of my website with the following visual error (https://imgur.com/a/GaIUXB4). The 1px thick section divider line is being placed below the headings rather than after the full content of the section. This is not an issue for other sections of the website, but the stacked, non line-by-line elements like these two sections have issues.
The html section is
...ANSWER
Answered 2021-Jun-03 at 18:27The floating of .talent
is most likely the culprit. When floating elements the parent looses track of their height, so if you check the dev tools you will most likely find out the divs with the class yui-gf
are actually ending there.
Remove the floating and width of the .talent
and try using grid on the parent to align its childs in columns.
QUESTION
I have started working with node js and am working with the line-by-line dependency. I have properly installed line-by-line and it is within the folder. Currently, my application will run but will not prompt the user to input an answer. My code is as follows:
...ANSWER
Answered 2021-Jun-02 at 17:32The problem here is that readline.question
is asynchronous and you need to wait for each callback to return, before you (a) can use the input and (b) create the next question. You are executing the console.log statement, however, directly after the question
call. It's probably the easiest way to wrap the question
into a promise, so that you can await the response.
Here is an example using promises: https://stackoverflow.com/a/47999168/3233827
QUESTION
My NestJS application has a simple purpose to:
- Loop through an array of large files ( 29 files where each one have about 12k to 70k lines)
- Read a file line by line and parse it
- Insert (each line) into my MongoDB collection
The most important part of my code consist of:
...ANSWER
Answered 2021-Jun-01 at 17:13I could make it work by changing the updateOne() to insertMany().
Quick explanation: instead of inserting one by one, we would be inserting by 100k.
So I just created an array of user and when it reached 100k documents, we would insert with insertMany()
QUESTION
My .gitconfig
currently includes this alias:
ANSWER
Answered 2021-May-30 at 15:05I was confused as well until I found this page of documentation. The part you are interested in is:
A line that defines a value can be continued to the next line by ending it with a
\
; the backslash and the end-of-line are stripped. Leading whitespaces aftername =
, the remainder of the line after the first comment character#
or;
, and trailing whitespaces of the line are discarded unless they are enclosed in double quotes. Internal whitespaces within the value are retained verbatim.Inside double quotes, double quote
"
and backslash\
characters must be escaped: use\"
for"
and\\
for\
.The following escape sequences (beside
\"
and\\
) are recognized:\n
for newline character (NL),\t
for horizontal tabulation (HT, TAB) and\b
for backspace (BS). Other char escape sequences (including octal escape sequences) are invalid.
So, here the correct alias in .git/config
:
QUESTION
I am trying to interpret line-by-line what is this assembly code doing but I found myself really confused when presented with this jump table which is in assembly.This is taken from the textbook exercise question 3.63 but there is no explanation on it - hence why I am asking it here. The goal is to reverse engineer provided assembly listing and write C code which could generate it (feel switch statement body). Please help :(
The textbook is : Randal E. Bryant, David R. O’Hallaron - Computer Systems. A Programmer’s Perspective [3rd ed.] (2016, Pearson)
qn 3.63
...ANSWER
Answered 2021-May-27 at 15:05There are apparently (5 or) 6 case
s of consecutive values, and the omnipresent default
.
The jump table contains one address per case, and you will find these addresses in your listing.
For example, 0x00000000004005a1 is the address of this part:
QUESTION
I have a text file of size 100-200 GB. So I wish to store in a compressed format (such as zip). However, I need to process it one line at a time due to its size. Though it is straightforward to read a text file one line at a time with io.Source.fromFile(fileName).getLines
, but that is only for unzipped files.
Is there some efficient way to read a compressed file in scala line-by-line? I couldn't find any examples but a closer implementation I saw was here but it loads file into memory. Unlike examples that are generally given that work with zip archive, I need to process only one text file that is compressed. I would be grateful for any pointers or leads.
...ANSWER
Answered 2021-May-24 at 22:25Consider better-files which gives an Iterator
into the compressed file
QUESTION
Consider this Ruby code:
...ANSWER
Answered 2021-May-20 at 16:18require
is implemented inside the VM, so it has access to internal functionality that normal Ruby code does not. For example it can manually escape its current scope and execute code at the top level. That is "how".
As for "why"? Imagining if you could require
into a specific scope, this would be extremely prone to breakage since it would change top-level self
from main
(which is an Object
) to... anything (in your example it would be A
, which is a Class
). It would be very hard to predict in general what would happen when your code is require
d.
By always executing loaded code at the top-level, the result is always consistent. And you can use the built-in hook mechanisms (included, extended, prepended, inherited) to access specific self
s from the scope that loaded you.
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