7,936 questions
1197
votes
13
answers
1.4m
views
How to get first N number of elements from an array
I am working with Javascript(ES6) /FaceBook react and trying to get the first 3 elements of an array that varies in size. I would like do the equivalent of Linq take(n).
In my Jsx file I have the ...
- 17.3k
687
votes
11
answers
344k
views
The difference between bracket [ ] and double bracket [[ ]] for accessing the elements of a list or dataframe
R provides two different methods for accessing the elements of a list or data.frame: [] and [[]].
What is the difference between the two, and when should I use one over the other?
- 17.7k
329
votes
20
answers
1.1m
views
How do you extract a column from a multi-dimensional array?
Does anybody know how to extract a column from a multi-dimensional array in Python?
jaweria
272
votes
15
answers
719k
views
How to extract all values from a dictionary in Python?
I have a dictionary d = {1:-0.3246, 2:-0.9185, 3:-3985, ...}.
How do I extract all of the values of d into a list l?
- 3,345
236
votes
2
answers
94k
views
How do I move a Git branch out into its own repository?
I have a branch that I'd like to move into a separate Git repository, and ideally keep that branch's history in the process. So far I've been looking at git filter-branch, but I can't make out ...
- 6,055
218
votes
7
answers
249k
views
Accessing last x characters of a string in Bash
I found out that with ${string:0:3} one can access the first 3 characters of a string. Is there a equivalently easy method to access the last three characters?
- 4,864
217
votes
7
answers
351k
views
How can I extract the folder path from file path in Python?
I would like to get just the folder path from the full path to a file.
For example T:\Data\DBDesign\DBDesign_93_v141b.mdb and I would like to get just T:\Data\DBDesign (excluding the \...
- 2,419
191
votes
15
answers
318k
views
How to extract text from a PDF? [closed]
Can anyone recommend a library/API for extracting the text and images from a PDF?
We need to be able to get at text that is contained in pre-known regions of the document, so the API will need to give ...
- 1,943
189
votes
9
answers
401k
views
Extract first item of each sublist in Python
I'm wondering what is the best way to extract the first item of each sublist in a list of lists and append it to a new list. So if I have:
lst = [[a,b,c], [1,2,3], [x,y,z]]
And, I want to pull out a, ...
- 3,716
187
votes
17
answers
262k
views
How to get the first word of a sentence in PHP?
I want to extract the first word of a variable from a string. For example, take this input:
<?php $myvalue = 'Test me more'; ?>
The resultant output should be Test, which is the first word of ...
- 1,937
175
votes
17
answers
274k
views
How to extract one column of a csv file
If I have a csv file, is there a quick bash way to print out the contents of only any single column? It is safe to assume that each row has the same number of columns, but each column's content would ...
- 17.6k
167
votes
15
answers
431k
views
Javascript - How to extract filename from a file input control
When a user selects a file in a web page I want to be able to extract just the filename.
I did try str.search function but it seems to fail when the file name is something like this: c:\uploads\ilike....
- 5,251
165
votes
7
answers
378k
views
How to extract a floating number from a string [duplicate]
I have a number of strings similar to Current Level: 13.4 db. and I would like to extract just the floating point number. I say floating and not decimal as it's sometimes whole. Can RegEx do this or ...
- 8,376
143
votes
5
answers
314k
views
Get string after character [duplicate]
I have a string that looks like this:
GenFiltEff=7.092200e-01
Using bash, I would like to just get the number after the = character. Is there a way to do this?
- 17.6k
119
votes
23
answers
211k
views
Extract images from PDF without resampling, in python? [closed]
How might one extract all images from a pdf document, at native resolution and format? (Meaning extract tiff as tiff, jpeg as jpeg, etc. and without resampling). Layout is unimportant, I don't care ...
- 18.1k
107
votes
4
answers
30k
views
What algorithm does Readability use for extracting text from URLs?
For a while, I've been trying to find a way of intelligently extracting the "relevant" text from a URL by eliminating the text related to ads and all the other clutter.After several months of ...
- 1,433
95
votes
6
answers
241k
views
Read Content from Files which are inside Zip file
I am trying to create a simple java program which reads and extracts the content from the file(s) inside zip file. Zip file contains 3 files (txt, pdf, docx). I need to read the contents of all these ...
- 1,553
93
votes
8
answers
161k
views
Extract and delete all .gz in a directory- Linux [closed]
I have a directory. It has about 500K .gz files.
How can I extract all .gz in that directory and delete the .gz files?
- 963
89
votes
9
answers
534k
views
how to extract only the year from the date in sql server 2008?
In sql server 2008, how to extract only the year from the date.
In DB I have a column for date, from that I need to extract the year.
Is there any function for that?
- 56.5k
89
votes
5
answers
232k
views
pandas extract year from datetime: df['year'] = df['date'].year is not working
I import a dataframe via read_csv, but for some reason can't extract the year or month from the series df['date'], trying that gives AttributeError: 'Series' object has no attribute 'year':
date ...
- 1,623
84
votes
8
answers
125k
views
How to parse the Manifest.mbdb file in an iOS 4.0 iTunes Backup
In iOS 4.0 Apple has redesigned the backup process.
iTunes used to store a list of filenames associated with backup files in the Manifest.plist file, but in iOS 4.0 it has moved this information to ...
- 1,569
84
votes
8
answers
51k
views
Extracting an information from web page by machine learning
I would like to extract a specific type of information from web pages in Python. Let's say postal address. It has thousands of forms, but still, it is somehow recognizable. As there is a large number ...
- 8,816
78
votes
5
answers
81k
views
Extract files from zip without keeping the structure using python ZipFile?
I try to extract all files from .zip containing subfolders in one folder. I want all the files from subfolders extract in only one folder without keeping the original structure. At the moment, I ...
- 1,063
73
votes
11
answers
191k
views
Extract the text out of HTML string using JavaScript
I am trying to get the inner text of HTML string, using a JS function(the string is passed as an argument). Here is the code:
function extractContent(value) {
var content_holder = "";
for ...
- 855
72
votes
8
answers
99k
views
How to extract top-level domain name (TLD) from URL
how would you extract the domain name from a URL, excluding any subdomains?
My initial simplistic attempt was:
'.'.join(urlparse.urlparse(url).netloc.split('.')[-2:])
This works for http://www.foo....
- 29.5k
69
votes
8
answers
307k
views
Extract MSI from EXE
I want to extract the MSI of an EXE setup to publish over a network.
For example, using Universal Extractor, but it doesn't work for Java Runtime Environment.
- 840
62
votes
6
answers
94k
views
How to extract just plain text from .doc & .docx files? [closed]
Anyone know of anything they can recommend in order to extract just the plain text from a .doc or .docx?
I've found this - wondered if there were any other suggestions?
- 693
56
votes
6
answers
16k
views
How to extract one file with commit history from a Git repo with index-filter & co?
I have a Git repo converted from SVN to Mercurial to Git, and I wanted to extract just one source file. I also had weird characters like aÌ (an encoding mismatch corrupted Unicode ä) and spaces in the ...
- 1,576
56
votes
4
answers
215k
views
Java: export to an .jar file in eclipse
I'm trying to export a program in Eclipse to a jar file.
In my project I have added some pictures and PDF:s. When I'm exporting to jar file, it seems that only the main has been compiled and ...
- 804
51
votes
9
answers
155k
views
Get min and max value in PHP Array
I have an array like this:
array (0 =>
array (
'id' => '20110209172713',
'Date' => '2011-02-09',
'Weight' => '200',
),
1 =>
array (
'id' => '20110209172747',
'Date' => '...
- 1,296
47
votes
17
answers
31k
views
Why is calling extract() on submission data (ex. $_GET, $_POST) risky / bad practice?
I was recently reading this thread, on some of the worst PHP practices.
In the second answer there is a mini discussion on the use of extract(), and im just wondering what all the huff is about.
I ...
- 28.2k
45
votes
3
answers
138k
views
Extract string before "|" [duplicate]
I have a data set wherein a column looks like this:
ABC|DEF|GHI,
ABCD|EFG|HIJK,
ABCDE|FGHI|JKL,
DEF|GHIJ|KLM,
GHI|JKLM|NO|PQRS,
BCDE|FGHI|JKL
.... and so on
I need to extract the ...
43
votes
3
answers
109k
views
Extract string from between quotations
I want to extract information from user-inputted text. Imagine I input the following:
SetVariables "a" "b" "c"
How would I extract information between the first set of quotations? Then the second? ...
- 1,285
42
votes
6
answers
46k
views
Extract .xip file into a folder from command line?
Apple occasionally uses a proprietary XIP file format, particularly when distributing versions of Xcode. It is an analog to zip, but is signed, allowing it to verified on the receiving system. When a ...
- 2,078
42
votes
3
answers
55k
views
C# regex pattern to extract urls from given string - not full html urls but bare links as well
I need a regex which will do the following
Extract all strings which starts with http://
Extract all strings which starts with www.
So i need to extract these 2.
For example there is this given ...
- 23.9k
42
votes
8
answers
136k
views
How to extract data from a PDF file while keeping track of its structure?
My objective is to extract the text and images from a PDF file while parsing its structure. The scope for parsing the structure is not exhaustive; I only need to be able to identify headings and ...
- 6,320
41
votes
5
answers
110k
views
How to extract metadata from an image using python?
How can I extract metadata from an image using Python?
- 431
41
votes
12
answers
30k
views
Extracting information from PDFs of research papers [closed]
I need a mechanism for extracting bibliographic metadata from PDF documents, to save people entering it by hand or cut-and-pasting it.
At the very least, the title and abstract. The list of authors ...
- 4,535
40
votes
3
answers
205k
views
Use binwalk to extract all files
I have a file music.mp3. After using binwalk, I get the result:
pexea12@DESMICE:~/Downloads$ binwalk music.mp3
DECIMAL HEXADECIMAL DESCRIPTION
----------------------------------------------...
- 1,209
40
votes
3
answers
76k
views
JAR - extracting specific files
I have .class and .java files in JAR archive. Is there any way to extract only .java files from it?
I've tried this command but it doesn't work:
jar xf jar-file.jar *.java
- 585
38
votes
7
answers
87k
views
Extract digits from string - Google spreadsheet
In Google spreadsheets, I need a formula to extract all digits (0 to 9) contained into an arbitrary string, that might contain any possible character and put them into a single cell.
Examples (Input -...
- 2,694
37
votes
6
answers
80k
views
How do you extract a url from a string using python?
For example:
string = "This is a link http://www.google.com"
How could I extract 'http://www.google.com' ?
(Each link will be of the same format i.e 'http://')
- 10.1k
37
votes
3
answers
54k
views
Extract a ZIP file programmatically by DotNetZip library?
I have a function that get a ZIP file and extract it to a directory
(I use DotNetZip library.)
public void ExtractFileToDirectory(string zipFileName, string outputDirectory)
{
ZipFile zip = ...
- 3,491
37
votes
2
answers
13k
views
Extract part of a git repository?
Assume my git repository has the following structure:
/.git
/Project
/Project/SubProject-0
/Project/SubProject-1
/Project/SubProject-2
and the repository has quite some commits. Now one of the ...
- 1,918
35
votes
3
answers
71k
views
How can I untar a tar.bz file in unix?
I've found tons of pages saying how to untar tar.bz2 files, but how would one untar a tar.bz file?
- 4,365
34
votes
6
answers
93k
views
Extracting text from PDFs in C# [closed]
Pretty simply, I need to rip text out of multiple PDFs (quite a lot actually) in order to analyse the contents before sticking it in an SQL database.
I've found some pretty sketchy free C# libraries ...
- 2,065
34
votes
3
answers
26k
views
Java library for keywords extraction from input text [closed]
I'm looking for a Java library to extract keywords from a block of text.
The process should be as follows:
stop word cleaning -> stemming -> searching for keywords based on English linguistics ...
- 507
32
votes
11
answers
68k
views
How can I extract multiple 7z files in folder at once in Ubuntu?
How can I extract about 900 7z files which are all located in the same folder (all have only one file inside) without doing it one by one?
I am using Ubuntu 10.10. All files are located in /home/...
- 1,138
31
votes
4
answers
62k
views
Regular expressions C# - is it possible to extract matches while matching?
Say, I have a string that I need to verify the correct format of; e.g. RR1234566-001 (2 letters, 7 digits, dash, 1 or more digits). I use something like:
Regex regex = new Regex(patternString)...
- 27.7k
31
votes
3
answers
57k
views
Extract first word from a column and insert into new column [duplicate]
I have a dataframe below and want to extract the first word and insert it into a new column
Dataframe1:
COL1
Nick K Jones
Dave G Barros
Matt H Smith
Convert it to this:
Dataframe2:
COL1 ...
- 863