I'm just going through this post and having trouble understanding the code. Could you please explain the rindex function for me? I'm still learning..
'man nawk' yields:
Quote:
Originally Posted by King Kalyan
Also, why did you use rindex function and not the following. I'm just curious to know and want to improve the way I look at problems.
Thanks in advance!
'cause, I don't like 'magic numbers' and making unnecessary assumptions of the data format IF I can avoid it. E.g., what would happen if we could not guaranteed that the number of minutes/hours was always a TWO digit number: '05' vs '5'. Your '17' would not fly. Whereas looking for the LAST ':' would.
It looked to me like that assuming the leading '[' will always be in the field is safe enough for my taste. On the other hand, if I can avoid counting characters (17) and can identify a 'pattern' and use it to derive what I need, I'd always take this road.
Just my $.02
I want to find the top N entries for a certain field based on the values of another field.
For example if N=3, we want the 3 best values for each entry:
Entry1 ||| 100
Entry1 ||| 95
Entry1 ||| 30
Entry1 ||| 80
Entry1 ||| 50
Entry2 ||| 40
Entry2 ||| 20
Entry2 ||| 10
Entry2 ||| 50... (1 Reply)
Hi, all
I need to get fields in a line that are separated by commas, some of the fields are enclosed with double quotes, and they are supposed to be treated as a single field even if there are commas inside the quotes.
sample input:
for this line, 5 fields are supposed to be extracted, they... (8 Replies)
First, thanks for the help in previous posts... couldn't have gotten where I am now without it!
So here is what I have, I use AWK to match $1 and $2 as 1 string in file1 to $1 and $2 as 1 string in file2. Now I'm wondering if I can extend this AWK command to incorporate the following:
If $1... (4 Replies)
I am trying to parse the input in awk to include the |gc= in $4 but am not able to. The below is close:
awk so far:
awk '{sub(/\|]+]++/, ""); print }' input.txt Input
chr1 955543 955763 AGRN-6|pr=2|gc=75 0 +
chr1 957571 957852 AGRN-7|pr=3|gc=61.2 0 +
chr1 970621 ... (7 Replies)
We have a csv file as mentioned below and the requirement is to change the date format in file as mentioned below.
Current file (file.csv)
----------------------
empname,date_of_join,dept,date_of_resignation
ram,08/09/2015,sales,21/06/2016
"akash,sahu",08/10/2015,IT,21/07/2016
... (6 Replies)
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Hopefully the awk is a start but I... (2 Replies)
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In the awk below I am trying to set/update the value of $14 in file2 in
bold, using the matching NM_ in $12 or $9 in file2
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The lengths of $9 and $12 can be variable but what is consistent is the start pattern
will always be NM_ and the end pattern is always ;... (2 Replies)
Hi Team,
In the below input file, if I have the value 23,24,25 then for those records 1st field value should get updated from "a" to "b". I also want to pass these values in file as input as it can be done dynamically. Tried awk commands but not getting desired output.Using SunOS 5.10 version.... (14 Replies)
Hi,
So awk is driving me crazy on this one. I have searched everywhere and read man, docs and every related post Google can find and still no luck. The actual files I need to run this on are sensitive in nature, but it is the same thing as if I needed to calculate weighted grades for multiple... (15 Replies)