CODEWITHSUNDEEP
regex
user2274204
user2274204

Reputation: 345

Regular expression to match last pattern of text

I have text like that: "2.3.7-SNAPSHOT-654", Witch means VERSION-SNAPSHOT-BUILD.

  1. I need to exclude the first part: "2.3.7-SNAPSHOT" separately
  2. And the build number "654" separately

so in my case i need two regex, i tried to do this:

[\d\.]

but it's give me all the numbers togohter. can you help me to build those two regex's

Upvotes: 1

Views: 178

Answers (4)

Moritz
Moritz

Reputation: 3225

Alternative regex for getting digits at the end of a string: "[1-9]+$".

  • [1-9] denotes one time any digit
  • [1-9]+ with the "+": any digit at least one or more times
  • $ denotes the end of the string

In Python that would be:

import re
text = "2.3.7-SNAPSHOT-654"
regex = re.compile(r"[1-9]+$")
output = re.search(regex, text)
print(output)
#output: <re.Match object; span=(15, 18), match='654'>

Then you can get the rest of the string by slicing the text string:

print(text[:output.regs[0][0]-1])
#output: 2.3.7-SNAPSHOT

Upvotes: 1

Wiktor Stribiżew
Wiktor Stribiżew

Reputation: 626845

You may use the following in Bash:

s="2.3.7-SNAPSHOT-654"
rx='([0-9.]+)-SNAPSHOT-([0-9]+)'
if [[ $s =~ $rx ]]; then
  echo ${BASH_REMATCH[1]}
  echo ${BASH_REMATCH[2]}
fi

See the online demo.

Regex details

  • ([0-9.]+) - Group 1: one or more digits or dots
  • -SNAPSHOT- - a literal string
  • ([0-9]+) - Group 2: one or more digits.

Upvotes: 1

Andrei Belov
Andrei Belov

Reputation: 44

Python:

text = "2.3.7-SNAPSHOT-654"
separator = "-"
text_list = text.split(separator)
number = text_list[-1]
first_part = text.replace(number, "")[:-1]
print(first_part)
print(number)

Or, in short

print("2.3.7-SNAPSHOT-654".split("-")[-1])
print("-".join("2.3.7-SNAPSHOT-654".split("-")[:-1]))

UPD in bash

#!/bin/bash

text="2.3.7-SNAPSHOT-654"
separator="-"
first_part=$(echo "$text" | sed "s/$separator[^$separator]*$//")
number=$(echo "$text" | awk -F  "$separator" '{print $NF}')
echo "$first_part"
echo "$number"

Or, in short

echo "2.3.7-SNAPSHOT-654" | sed "s/-[^-]*$//"
echo "2.3.7-SNAPSHOT-654" | awk -F  "-" '{print $NF}'

Output:

2.3.7-SNAPSHOT
654

Upvotes: 2

imraklr
imraklr

Reputation: 317

Hi I tried this in python:

import re
text = '2.3.7-SNAPSHOT-654'
first_part = re.sub('-[\d]+', '', text)
build_number = re.sub('[\d.]+-\w+-', '', text)
print(first_part)
print(build_number)

Output:

'2.3.7-SNAPSHOT'

'654'

Upvotes: 1

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