Line By Line is a NodeJS module that helps you reading large text files, line by line, without buffering the files into memory.
Questions tagged [line-by-line]
114 questions
0
votes
0 answers
Contradictory behaviour while applying RegEx.exec() while reading a file line-by-line
i am trying to do this:
render(argv,function() {
var fileHandle = argv.output + '/docu.html';
var regex_ca_id = new RegExp('[A-Za-z1-9]{16}#[A-Za-z1-9]{5}',"g");
var rd = readline.createInterface({
input:…
user3472094
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- 1
0
votes
1 answer
How to read in a text file (line-by-line) and use the output as nameS to create .pdf Files in java?
I'm writing a program that would allow me to create several PDF Files with a set of given names (from a text file, each name represented by a line in the file). These PDF Files will have a watermark on each page.
Here's the code I'm using:
…
Zestos
- 15
- 1
- 7
0
votes
3 answers
Ruby script to read file line by line and do if statments with puts?
I am trying to write a script that will fill out a mapping of equipment by using if statments on a text file.
Here is the code I have tried:
input.txt:
SWITCH
ROUTER
FIREWALL
ROUTER
ROUTER
FIREWALL
SWITCH
SWITCH
Ruby code:
IO.foreach("input.txt")…
emvee
- 304
- 4
- 17
0
votes
2 answers
Index elements of large CSV file when reading line by line
I'm reading a large CSV file (>15 GB) line by line in R. I'm using
con <- file("datafile.csv", open = "r")
while (length(oneLine <- readLines(con, n = 1, warn = FALSE)) > 0) {
# code to be written
}
In the "code to be written" section, I need…
ostionalzax
- 25
- 3
0
votes
1 answer
Python extracting one and two word sentence from a csv line by line and writing it to other
Hi I have a csv with sentences in quotes, I want to leave out any sentence which has no more than three words and copy it to the other csv line by line. All help highly appreciated.
Thanks
Input csv:
"9795e7dc9a5b032bdb39ace56c08b0e1","Top …
yadavabhishek
- 17
- 1
- 4
0
votes
1 answer
Reading text files with strtol in C line by line
OK so I've got this function which finds the average of all numbers in a file:
float averageOfNumbers(FILE *fp_in)
{
int n=0,S=0;
char red[1024];char *ptr;
int p_a_h;
float sr;
while(!feof(fp_in)){
…
glavata
- 45
- 4
0
votes
4 answers
C# Reading line by line from file to listbox
I have a problem with reading text from file line by line.
System.IO.StreamReader file = new System.IO.StreamReader("ais.txt");
while ((line = file.ReadLine()) != null)
{
listBox1.Items.Add(line);
}
This code only read last line from file and…
Paweł Karczewski
- 1
- 1
0
votes
1 answer
LIne-by-line file-io not working as expected in Windows
I'm using Perl 5.16.1 from Strawberry in a Windows environment. I have a Perl script reading very large text files. The smallest text file is 30M. When reading files that do not have a line feed at the end of the very last line I get very peculiar…
-1
votes
1 answer
Whey does splitting a line of code into (that does many things) into many smaller lines run *so* much slower
This is all in python 3. I have a line of code that essentially does this:
somefloat += someDict(someList(someIndex1)))(someIndex2)
In essence what I have is a list of dictionaries, each dictionary containing multiple entries that point to a list…
user6916458
- 400
- 2
- 7
- 19
-1
votes
1 answer
How to read integers line by line from a text file in c++?
So I have a problem about a graph and I have to read from an input file multiple cases and check a propriety. Each case has on the first line n, the number of nodes it has, and on the second line a sequence of integers x y, where (x, y) is an edge.…
-1
votes
1 answer
How to split input text file that has string and doubles?
I am to read from an .txt input and sort into array by line (read: first name, last name, grade1, grade 2, grade3) but I am having issues. I am assuming that I would have to create arrays for each person, but I cannot get past sorting each line…
Michael Lewis
- 11
- 2
-1
votes
1 answer
Prinft line by line of file single thread C
I'm very stuck with one single problem, I need prinft file's line one by one in order with one thread. This is the code:
#include
#include
#include
#include
/* Prototypes */
…
StAx
- 272
- 1
- 3
- 16
-1
votes
1 answer
Visual c++ how to read from rich text box
I am trying to read from a rich text box line by line in Visual c++ but don't know how to do it.
Can anyone provide a small example of how it works? I am really new to visual studio and Visual C++.
What I would like to do,is to store each line from…
Cata
- 101
- 1
- 12
-1
votes
4 answers
For each line in file execute command synchronously and save to newline of another file
I have a wget script named Chktitle.sh -- this script takes a command like below
$ Chktitle.sh "my url"
I then have a file name url.txt with over 100 lines with urls and ips to check for web-page titles.
Then i have results.txt as a blank file.
Is…
Leo Bishop
- 9
- 2
