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Remove element from array containing empty or whitespace character in Perl


Remove element from array containing empty or whitespace character in Perl

By : user2953905
Date : November 21 2020, 07:31 AM
will help you
the first grep is sufficient, But doing a substitution in grep seems odd, better use map for this. See grep as a filter.
code :
use strict; use warnings;

my @x = ('aa','', 'bb','    ','cc', '\t');
my @y = ('aa','bb','cc');

@x = grep {s/^\s+|\s+$//g; $_ } @x;
print join "\n", @x;
grep { /\S/ } @x
aa
bb
cc
\t


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How to remove newline character and white spaces after them and replacing them with just whitespace character in Perl?

How to remove newline character and white spaces after them and replacing them with just whitespace character in Perl?


By : user2953896
Date : March 29 2020, 07:55 AM
help you fix your problem substitution operator
code :
use warnings;
use strict;

my $s = "foo\n    bar goo\nber";
$s =~ s/\n\s*/ /g;
print "$s\n";

__END__

foo bar goo ber
How to remove whitespace in array element?

How to remove whitespace in array element?


By : user2582735
Date : March 29 2020, 07:55 AM
Hope that helps HI I got so many empty & white-space element in array. anyone know how to remove it? IN PHP , Just used below code :
code :
$my[0] = ""
$my[1] = 5.21
$my[2] = 425
$my[3] = " "
$my[4] = " "
$my[5] = 75

print_r(array_filter(array_map("trim",$my)));
Delimited files - remove beginning and trailing whitespace, and empty whitespace values (Notepad++ and Excel)

Delimited files - remove beginning and trailing whitespace, and empty whitespace values (Notepad++ and Excel)


By : willibrord
Date : March 29 2020, 07:55 AM
like below fixes the issue I have a file that is pipe-delimited and semi-fixed width. What I mean by that, is that the values can look like this: , How about:
Find what: \s*\|\s*
Remove empty or whitespace strings from array - Javascript

Remove empty or whitespace strings from array - Javascript


By : Matti
Date : March 29 2020, 07:55 AM
seems to work fine filter works, but you need the right predicate function, which Boolean isn't (for this purpose):
code :
// Example 1 - Using String#trim (added in ES2015, needs polyfilling in outdated
// environments like IE)
arr = arr.filter(function(entry) { return entry.trim() != ''; });
// Example 2 - Using a regular expression instead of String#trim
arr = arr.filter(function(entry) { return /\S/.test(entry); });
// Example 3
var rex = /\S/;
arr = arr.filter(rex.test.bind(rex));
// Example 4
arr = arr.filter(entry => entry.trim() != '');
// Example 5
arr = arr.filter(entry => /\S/.test(entry));
var arr = ['Apple', '  ', 'Mango', '', 'Banana', ' ', 'Strawberry'];
snippet.log("Example 1: " + JSON.stringify(arr.filter(function(entry) { return entry.trim() != ''; })));
snippet.log("Example 2: " + JSON.stringify(arr.filter(function(entry) { return /\S/.test(entry); })));
var rex = /\S/;
snippet.log("Example 3: " + JSON.stringify(arr.filter(rex.test.bind(rex))));
<!-- Script provides the `snippet` object, see http://meta.stackexchange.com/a/242144/134069 -->
<script src="//tjcrowder.github.io/simple-snippets-console/snippet.js"></script>
var arr = ['Apple', '  ', 'Mango', '', 'Banana', ' ', 'Strawberry'];
snippet.log("Example 4: " + JSON.stringify(arr.filter(entry => !entry.trim() == '')));
snippet.log("Example 5: " + JSON.stringify(arr.filter(entry => /\S/.test(entry))));
<!-- Script provides the `snippet` object, see http://meta.stackexchange.com/a/242144/134069 -->
<script src="//tjcrowder.github.io/simple-snippets-console/snippet.js"></script>
Remove whitespace from beginning of each array element

Remove whitespace from beginning of each array element


By : V. Sec
Date : March 29 2020, 07:55 AM
may help you . I have text file like below(note the whitespaces at the start): , Ok to ltrim(), but use it with array_map():
code :
$lines = array_map( 'ltrim', $liness );
file_put_contents( 'file.txt', implode($lines) );
foreach( $lines as $line ) echo "$line\n";
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