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Removing empty entries and adding them as a whitespace in the previous entry of a list


Removing empty entries and adding them as a whitespace in the previous entry of a list

By : user2950435
Date : November 17 2020, 11:55 AM
hop of those help? You can use regex for this, this will match all the spaces that come after the first space:
code :
>>> import re
>>> s = "The quick  brown fox"
>>> re.findall(r'\S+\s*(?=\s\S|$)', s)
['The', 'quick ', 'brown', 'fox']
\S+\s*(?=\s\S|$)
>>> s = "The quick  brown fox"
>>> re.findall(r'((?:(?<=^\s)\s*)?\S+\s*(?=\s\S|$))', s)
['The', 'quick ', 'brown', 'fox']
>>> s1 = "  The quick  brown fox"
>>> re.findall(r'((?:(?<=^\s)\s*)?\S+\s*(?=\s\S|$))', s1)
[' The', 'quick ', 'brown', 'fox']
((?:(?<=^\s)\s*)?\S+\s*(?=\s\S|$))


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Split a comma separated string while removing whitespace and empty entries

Split a comma separated string while removing whitespace and empty entries


By : Dyna
Date : March 29 2020, 07:55 AM
it should still fix some issue Using Trim with StringSplitOptions.RemoveEmptyEntries doesn't work because " " isn't considered an empty entry. You need to do a normal split, then trim each item, then filter out the empty strings.
code :
valueString.Split(',')
    .Select(x => x.Trim())
    .Where(x => !string.IsNullOrWhiteSpace(x))
    .ToArray();
Removing sublists of empty entries from a list

Removing sublists of empty entries from a list


By : RODRIGO DIAS FIGUEIR
Date : March 29 2020, 07:55 AM
help you fix your problem Use the any() function to select lists with non-empty values:
code :
clean_list = [sublist for sublist in some_list if any(sublist)]
R: get each entry's previous entries in data.table

R: get each entry's previous entries in data.table


By : user3082790
Date : March 29 2020, 07:55 AM
Any of those help The data I have consist of groups and each group has entries along a time dimension. , You can use a non-equi self join:
code :
library(data.table)
set.seed(42)
dat <- data.table(group=rep(1:2,each=5), t=rep(1:5,2), x=rnorm(10))
#    group t           x
# 1:     1 1  1.37095845
# 2:     1 2 -0.56469817
# 3:     1 3  0.36312841
# 4:     1 4  0.63286260
# 5:     1 5  0.40426832
# 6:     2 1 -0.10612452
# 7:     2 2  1.51152200
# 8:     2 3 -0.09465904
# 9:     2 4  2.01842371
#10:     2 5 -0.06271410

dat[dat, .(group, t.cons = i.t, t = x.t, x),
    on = c("group", "t < t"), allow.cartesian = TRUE,
    nomatch = NULL]
#    group t.cons t           x
# 1:     1      2 1  1.37095845
# 2:     1      3 1  1.37095845
# 3:     1      3 2 -0.56469817
# 4:     1      4 1  1.37095845
# 5:     1      4 2 -0.56469817
# 6:     1      4 3  0.36312841
# 7:     1      5 1  1.37095845
# 8:     1      5 2 -0.56469817
# 9:     1      5 3  0.36312841
#10:     1      5 4  0.63286260
#11:     2      2 1 -0.10612452
#12:     2      3 1 -0.10612452
#13:     2      3 2  1.51152200
#14:     2      4 1 -0.10612452
#15:     2      4 2  1.51152200
#16:     2      4 3 -0.09465904
#17:     2      5 1 -0.10612452
#18:     2      5 2  1.51152200
#19:     2      5 3 -0.09465904
#20:     2      5 4  2.01842371
Removing Last Empty Entry After Getting Drive List - Batch Script

Removing Last Empty Entry After Getting Drive List - Batch Script


By : user3462508
Date : March 29 2020, 07:55 AM
will help you Filter for the relevant lines: ... Get DeviceID^|find ":"') do ... to get rid of empty entries and echo %_DRIVE.LETTERS.USED:~0,-3% to delete the last space/semicolon/space:
code :
@echo off
setlocal enabledelayedexpansion
for /f "skip=1 tokens=1,2 delims=: " %%a in ('WMIC LogicalDisk Where "DriveType='3'" Get DeviceID ^|find ":"') do (
   set "_DRIVE.LETTERS.USED=!_DRIVE.LETTERS.USED!%%a:\ ; "
)
echo %_DRIVE.LETTERS.USED:~0,3%
Removing empty entries in an array list

Removing empty entries in an array list


By : Tonio
Date : March 29 2020, 07:55 AM
hop of those help? There are a lot of ways you can do. Here are just some examples
Adjust the index
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