Regex for selecting words ending in 'ing' unless
I want to select words ending in with a regular expression, but I want exclude words that end in thing. For example:
everything
running
catching
nothing
Of these words, running and catching should be selected, everything and nothing should be excluded.
I've tried the following:
.+ing$
But that selects everything. I'm thinking look aheads/look arounds could be the solution, but I haven't been able to get one that works.
Solutions that work in Python or R would be helpful.
regex regex-negation regex-lookarounds
asked Nov 12 '18 at 21:08
Todd Shannon
537
add a comment |
I want to select words ending in with a regular expression, but I want exclude words that end in thing. For example:
everything
running
catching
nothing
Of these words, running and catching should be selected, everything and nothing should be excluded.
I've tried the following:
.+ing$
But that selects everything. I'm thinking look aheads/look arounds could be the solution, but I haven't been able to get one that works.
Solutions that work in Python or R would be helpful.
regex regex-negation regex-lookarounds
asked Nov 12 '18 at 21:08
Todd Shannon
537
Usebw*ingb(?<!thing)orbw*(?<!th)ingb
– Wiktor Stribiżew
Nov 12 '18 at 21:11
add a comment |
I want to select words ending in with a regular expression, but I want exclude words that end in thing. For example:
everything
running
catching
nothing
Of these words, running and catching should be selected, everything and nothing should be excluded.
I've tried the following:
.+ing$
But that selects everything. I'm thinking look aheads/look arounds could be the solution, but I haven't been able to get one that works.
Solutions that work in Python or R would be helpful.
regex regex-negation regex-lookarounds
asked Nov 12 '18 at 21:08
Todd Shannon
537
I want to select words ending in with a regular expression, but I want exclude words that end in thing. For example:
everything
running
catching
nothing
Of these words, running and catching should be selected, everything and nothing should be excluded.
I've tried the following:
.+ing$
But that selects everything. I'm thinking look aheads/look arounds could be the solution, but I haven't been able to get one that works.
Solutions that work in Python or R would be helpful.
regex regex-negation regex-lookarounds
regex regex-negation regex-lookarounds
asked Nov 12 '18 at 21:08
Todd Shannon
537
asked Nov 12 '18 at 21:08
Todd Shannon
537
asked Nov 12 '18 at 21:08
Todd Shannon
537
asked Nov 12 '18 at 21:08
Todd Shannon
537
asked Nov 12 '18 at 21:08
Todd Shannon
537
537
Usebw*ingb(?<!thing)orbw*(?<!th)ingb
– Wiktor Stribiżew
Nov 12 '18 at 21:11
add a comment |
Usebw*ingb(?<!thing)orbw*(?<!th)ingb
– Wiktor Stribiżew
Nov 12 '18 at 21:11
Use
bw*ingb(?<!thing) or bw*(?<!th)ingb– Wiktor Stribiżew
Nov 12 '18 at 21:11
Use
bw*ingb(?<!thing) or bw*(?<!th)ingb– Wiktor Stribiżew
Nov 12 '18 at 21:11
add a comment |
3 Answers
3
active
oldest
votes
In python you can use negative lookbehind assertion as this:
^.*(?<!th)ing$
RegEx Demo
(?<!th) is negative lookbehind expression that will fail the match if th comes before ing at the end of string.
Note that if you are matching words that are not on separate lines then instead of anchors use word boundaries as:
w+(?<!th)ingb
answered Nov 12 '18 at 21:11
anubhava
520k46316390
add a comment |
Something like bw+(?<!th)ingb maybe.
answered Nov 12 '18 at 21:11
sln
26.3k31636
add a comment |
You might also use a negative lookahead (?! to assert that what is on the right is not 0+ times a word character followed by thing and a word boundary:
b(?!w*thingb)w*ingb
Regex demo | Python demo
answered Nov 12 '18 at 21:15
The fourth bird
20.8k71326
Think you need to addingto the end of your regex so that it does not match words that do not end in "ing".
– benvc
Nov 12 '18 at 21:17
@benvc You are correct, thank you!
– The fourth bird
Nov 12 '18 at 21:21
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
In python you can use negative lookbehind assertion as this:
^.*(?<!th)ing$
RegEx Demo
(?<!th) is negative lookbehind expression that will fail the match if th comes before ing at the end of string.
Note that if you are matching words that are not on separate lines then instead of anchors use word boundaries as:
w+(?<!th)ingb
answered Nov 12 '18 at 21:11
anubhava
520k46316390
add a comment |
In python you can use negative lookbehind assertion as this:
^.*(?<!th)ing$
RegEx Demo
(?<!th) is negative lookbehind expression that will fail the match if th comes before ing at the end of string.
Note that if you are matching words that are not on separate lines then instead of anchors use word boundaries as:
w+(?<!th)ingb
answered Nov 12 '18 at 21:11
anubhava
520k46316390
add a comment |
In python you can use negative lookbehind assertion as this:
^.*(?<!th)ing$
RegEx Demo
(?<!th) is negative lookbehind expression that will fail the match if th comes before ing at the end of string.
Note that if you are matching words that are not on separate lines then instead of anchors use word boundaries as:
w+(?<!th)ingb
answered Nov 12 '18 at 21:11
anubhava
520k46316390
In python you can use negative lookbehind assertion as this:
^.*(?<!th)ing$
RegEx Demo
(?<!th) is negative lookbehind expression that will fail the match if th comes before ing at the end of string.
Note that if you are matching words that are not on separate lines then instead of anchors use word boundaries as:
w+(?<!th)ingb
answered Nov 12 '18 at 21:11
anubhava
520k46316390
answered Nov 12 '18 at 21:11
anubhava
520k46316390
answered Nov 12 '18 at 21:11
anubhava
520k46316390
answered Nov 12 '18 at 21:11
anubhava
520k46316390
520k46316390
add a comment |
add a comment |
Something like bw+(?<!th)ingb maybe.
answered Nov 12 '18 at 21:11
sln
26.3k31636
add a comment |
Something like bw+(?<!th)ingb maybe.
answered Nov 12 '18 at 21:11
sln
26.3k31636
add a comment |
Something like bw+(?<!th)ingb maybe.
answered Nov 12 '18 at 21:11
sln
26.3k31636
Something like bw+(?<!th)ingb maybe.
answered Nov 12 '18 at 21:11
sln
26.3k31636
answered Nov 12 '18 at 21:11
sln
26.3k31636
answered Nov 12 '18 at 21:11
sln
26.3k31636
answered Nov 12 '18 at 21:11
sln
26.3k31636
26.3k31636
add a comment |
add a comment |
You might also use a negative lookahead (?! to assert that what is on the right is not 0+ times a word character followed by thing and a word boundary:
b(?!w*thingb)w*ingb
Regex demo | Python demo
answered Nov 12 '18 at 21:15
The fourth bird
20.8k71326
Think you need to addingto the end of your regex so that it does not match words that do not end in "ing".
– benvc
Nov 12 '18 at 21:17
@benvc You are correct, thank you!
– The fourth bird
Nov 12 '18 at 21:21
add a comment |
You might also use a negative lookahead (?! to assert that what is on the right is not 0+ times a word character followed by thing and a word boundary:
b(?!w*thingb)w*ingb
Regex demo | Python demo
answered Nov 12 '18 at 21:15
The fourth bird
20.8k71326
Think you need to addingto the end of your regex so that it does not match words that do not end in "ing".
– benvc
Nov 12 '18 at 21:17
@benvc You are correct, thank you!
– The fourth bird
Nov 12 '18 at 21:21
add a comment |
You might also use a negative lookahead (?! to assert that what is on the right is not 0+ times a word character followed by thing and a word boundary:
b(?!w*thingb)w*ingb
Regex demo | Python demo
answered Nov 12 '18 at 21:15
The fourth bird
20.8k71326
You might also use a negative lookahead (?! to assert that what is on the right is not 0+ times a word character followed by thing and a word boundary:
b(?!w*thingb)w*ingb
Regex demo | Python demo
answered Nov 12 '18 at 21:15
The fourth bird
20.8k71326
edited Nov 12 '18 at 21:48
answered Nov 12 '18 at 21:15
The fourth bird
20.8k71326
answered Nov 12 '18 at 21:15
The fourth bird
20.8k71326
answered Nov 12 '18 at 21:15
The fourth bird
20.8k71326
20.8k71326
Think you need to addingto the end of your regex so that it does not match words that do not end in "ing".
– benvc
Nov 12 '18 at 21:17
@benvc You are correct, thank you!
– The fourth bird
Nov 12 '18 at 21:21
add a comment |
Think you need to addingto the end of your regex so that it does not match words that do not end in "ing".
– benvc
Nov 12 '18 at 21:17
@benvc You are correct, thank you!
– The fourth bird
Nov 12 '18 at 21:21
Think you need to add
ing to the end of your regex so that it does not match words that do not end in "ing".– benvc
Nov 12 '18 at 21:17
Think you need to add
ing to the end of your regex so that it does not match words that do not end in "ing".– benvc
Nov 12 '18 at 21:17
@benvc You are correct, thank you!
– The fourth bird
Nov 12 '18 at 21:21
@benvc You are correct, thank you!
– The fourth bird
Nov 12 '18 at 21:21
add a comment |
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bw*ingb(?<!thing)orbw*(?<!th)ingb– Wiktor Stribiżew
Nov 12 '18 at 21:11