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CONFIG.CONFIG
create state file${number_of_edges} {
{interval=60
idle_interval_notification="DISABLED"}
}
create state file${number_of_edges} {
{interval=60
idle_interval_notification="DISABLED"}
}
I have file which has content like above. I want to replace ${number_of_edges} string with consecutive numbers like 0,1,2 and so on
EXPECTED OUTPUT
create state file0 {
{interval=60
idle_interval_notification="DISABLED"}
}
create state file1{
{interval=60
idle_interval_notification="DISABLED"}
}
create state file2 {
{interval=60
idle_interval_notification="DISABLED"}
}
I got the solution.
Command -
awk -vRS=edge '{$0=n$0;ORS=RT}++n' FILE
A simple awk script:
awk 'sub("\\${number_of_edges}",cnt+1, $0){cnt++}1' input.txt
Explanation:
sub("\\${number_of_edges}",cnt+1, $0) For each input line, substitute, ${number_of_edges} with variable (cnt + 1)
{cnt++} If substituted more than 0, increment variable cnt
1 output each input line
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I'm looking to insert a quote in a string, but keep everything else. So, an example string:
' "2020-10-10",8000,"Hello" '
I want to put quotes around 8000 (or whatever number is there). so:
' "2020-10-10","8000","Hello" '
How would I do that in regex?
I'm not an expert on regex but you can do it you just have to do it twice. Because I couldn't figure out a way to look for ",char or char,".
function test() {
try {
let a = ' "2020-10-10",8000,"Hello" ';
a = a.replace(/,/g,'","');
a = a.replace(/""/g,'"');
console.log(a);
}
catch(err) {
console.log(err);
}
}
7:26:23 AM Notice Execution started
7:26:23 AM Info "2020-10-10","8000","Hello"
7:26:23 AM Notice Execution completed
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I have text column with following examplary data:
5,5,0.1;6,6,0.15;7,7,0.2;8,8,0.25;9,9,0.3;10,10,0.35;11,11,0.4;12,12,0.45;13,13,0.5;14,14,0.55;15,15,0.6;16,16,0.65;17,17,0.7;18,18,0.75;19,19,0.8;20,20,0.85;
I need to add some fixed value to each of numeric values (the one before semicolon)
so for example from:
5,5,0.1;6,6,0.15; I want add 0.15 so result would be:
5,5,0.25;6,6,0.3;
I guess I should try something with regexp_replace but I have no idea how to start here
The correct solution would be fix your broken data model and not store multiple, delimited values in a single column.
I wouldn't do this with a regex, but unnesting the elements of the string, adding the value to the third element, then aggregate everything back into the broken design:
update badly_designed_table
set denormalized_column =
(select string_agg(concat_ws(',', a, b, round(c + 0.15,2)), ';' order by idx)
from (
select split_part(val, ',', 1) as a,
split_part(val, ',', 2) as b,
split_part(val, ',', 3)::numeric as c,
idx
from unnest(string_to_array(bad_column, ';')) with ordinality as x(val,idx)
-- skip the "empty" element generated by the trailing ;
where nullif(val, '') is not null
) t)
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Basically here is my code and I cannot find the problem with this, So I'm looking for advice.
name = raw_input('What\'s your name? ')
if not re.match(r'[A-Za-z- ]+', name):
print 'Invalid name.\n' #error message
You must need to add end of the line anchor. Without the anchor foo? would be considered as a valid one. That is, it won't print the message Invalid name for this name.
if not re.match(r'[A-Za-z- ]+$', name):
print 'Invalid name.\n'
Example:
>>> s = 'foo?'
>>> if not re.match(r'[A-Za-z- ]+', s):
print('Invalid name.\n')
>>> if not re.match(r'[A-Za-z- ]+$', s):
print('Invalid name.\n')
Invalid name.
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The simulation code I use needs to read parameters from an input.txt file which looks like
paramA = 1,paramB = 2,
paramC = 3,paramD = 4,
When scanning a parameter (like paramC) in my simulation, I need to change the value of paramC every time manually. How can I do this with a perl script so that when I type
perl scriptname input.txt paramC 100
in the command line I can get a modified input file with paramC changed to 100
paramA = 1,paramB = 2,
paramC = 100,paramD = 4,
I can do this by creating a template file like
paramA = 1,paramB = 2,
paramC = <>,paramD = 4,
and then use perl to match the mark <> and replace it with the value I want. However is there a more direct way to match the parameter name and change its value ?
thanks.
The obvious answer is to use a regular expression. Perl is quite good at those.
So you could - for example - do:
s/paramC = \d+/paramC = $value/g;
Which'll do the trick I'd have thought?
Edit: Or use TLP's pattern in the comments:
s/^paramC = \K[^ ,]+/$value/g;
or perhaps:
s/^paramC = \K\d+/$value/g;
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arr1 = 1,2,3,4,5;
arr2 = 1,2,3;
want to compare and output as arr3=4,5;
Please help
thanks in advance
arry::utils error out, looks like some problem with the package, so that option is ruled out.
sub diff_array {
my ($a1, $a2) = #_;
my %h;
#h{#$a2} = ();
return grep !exists $h{$_}, #$a1;
}
my #arr1 = (1,2,3,4,5);
my #arr2 = (1,2,3);
my #arr3 = diff_array(\#arr1, \#arr2);