I am making a program which got to split the phone-number apart, each part has been divided by a hyphen (or spaces, or '( )' or empty).
Exp: Input: 0xx-xxxx-xxxx or 0xxxxxxxxxx or (0xx)xxxx-xxxx
Output: code 1: 0xx
code 2: xxxx
code 3: xxxx
But my problem is: sometime "Code 1" is just 0x -> so "Code 2" must be xxxxx (1st part always have hyphen or a parenthesis when 2 digit long)
Anyone can give me a hand, It would be grateful.
According to your comments, the following regex will extract the information you need
^\(?(0\d{1,2})\)?[- ]?(\d{4,5})[- ]?(\d{4})$
Break down:
^\(?(0\d{1,2})\)? matches 0x, 0xx, (0xx) and (0x) at he beggining of the string
[- ]? as parenthesis can only be used for the first group, the only valid separators left are space and the hyphen. ? means 0 or 1 time.
(\d{4,5}) will match the second group. As the length of the 3rd group is fixed (4 digits), the regex will automatically calculate the length of the Group1 and 2.
(\d{4})$ matches the 4 digits at the end of the number.
See it in action
You can the extract data from capture group 1,2 and 3
Note: As mentionned in the comments of the OP, this only extracts data from correctly formed numbers. It will match some ill-formed numbers.
Related
I would like to check if a specific column in one of my tables meets the following conditions:
String must contain at least three characters
String must contain at least two different numbers [e.g. 123 would work but 111 would not]
Characters which are allowed in the string:
Numbers (0-9)
Uppercase letters
Lowercase letters
Underscores (_)]
Dashes (-)
I have some experience with Regex but am having issues with Snowflake's syntax. Whenever I try using the '?' regex character (to mark something as optional) I receive an error. Can someone help me understand a workaround and provide a solution?
What I have so far:
SELECT string,
LENGTH(string) AS length
FROM tbl
WHERE REGEXP_LIKE(string,'^[0-9]+{3,}[-+]?[A-Z]?[a-z]?$')
ORDER BY length;
Thanks!
Your regex looks a little confusing and invalid, and it doesn't look like it quite meets your needs either. I read this expression as a string that:
Must start with one or more digits, at least 3 or more times
The confusing part to me is the '+' is a quantifier, which is not quantifiable with {3,} but somehow doesn't produce an error for me
Optionally followed by either a dash or plus sign
Followed by an uppercase character zero or one times (giving back as needed)
Followed by and ending with a lowercase character zero or one times (giving back as needed)
Questions
You say that your string must contain 3 characters and at least 2 different numbers, numbers are characters but I'm not sure if you mean 3 letters...
Are you considering the numbers to be characters?
Does the order of the characters matter?
Can you provide an example of the error you are receiving?
Notes
Checking for a second digit that is not the same as the first involves the concept of a lookahead with a backreference. Snowflake does not support backreferences.
One thing about pattern matching with regular expressions is that order makes a difference. If order is not of importance to you, then you'll have multiple patterns to match against.
Example
Below is how you can test each part of your requirements individually. I've included a few regexp_substr functions to show how extraction can work to check if something exists again.
Uncomment the WHERE clause to see the dataset filtered. The filters are written as expressions so you can remove any/all of the regexp_* columns.
select randstr(36,random(123)) as r_string
,length(r_string) AS length
,regexp_like(r_string,'^[0-9]+{3,}[-+]?[A-Z]?[a-z]?$') as reg
,regexp_like(r_string,'.*[A-Za-z]{3,}.*') as has_3_consecutive_letters
,regexp_like(r_string,'.*\\d+.*\\d+.*') as has_2_digits
,regexp_substr(r_string,'(\\d)',1,1) as first_digit
,regexp_substr(r_string,'(\\d)',1,2) as second_digit
,first_digit <> second_digit as digits_1st_not_equal_2nd
,not(regexp_instr(r_string,regexp_substr(r_string,'(\\d)',1,1),1,2)) as first_digit_does_not_appear_again
,has_3_consecutive_letters and has_2_digits and first_digit_does_not_appear_again as test
from table(generator(rowcount => 10))
//where regexp_like(r_string,'.*[A-Za-z]{3,}.*') // has_3_consecutive_letters
// and regexp_like(r_string,'.*\\d+.*\\d+.*') // has_2_digits
// and not(regexp_instr(r_string,regexp_substr(r_string,'(\\d)',1,1),1,2)) // first_digit_does_not_appear_again
;
Assuming the digits need to be contiguous, you can use a javascript UDF to find the number in a string with with the largest number of distinct digits:
create or replace function f(S text)
returns float
language javascript
returns null on null input
as
$$
const m = S.match(/\d+/g)
if (!m) return 0
const lengths = m.map(m=> [...new Set (m.split(''))].length)
const max_length = lengths.reduce((a,b) => Math.max(a,b))
return max_length
$$
;
Combined with WHERE-clause, this does what you want, I believe:
select column1, f(column1) max_length
from t
where max_length>1 and length(column1)>2 and column1 rlike '[\\w\\d-]+';
Yielding:
COLUMN1 | MAX_LENGTH
------------------------+-----------
abc123def567ghi1111_123 | 3
123 | 3
111222 | 2
Assuming this input:
create or replace table t as
select * from values ('abc123def567ghi1111_123'), ('xyz111asdf'), ('123'), ('111222'), ('abc 111111111 abc'), ('12'), ('asdf'), ('123 456'), (null);
The function is even simpler if the digits don't have to be contiguous (i.e. count the distinct digits in a string). Then core logic changes to:
const m = S.match(/\d/g)
if (!m) return 0
const length = [...new Set (m)].length
return length
Hope that's helpful!
I am trying to create a syntax parser using C-Bison and Flex. In Flex I have a regular expression which matches integers based on the following:
Must start with any digit in range 1-9 and followed by any number of digits in range 0-9. (ex. Correct: 1,12,11024 | Incorrect: 012)
Can be signed (ex. +2,-5)
The number 0 must not be followed by any digit (0-9) and must not signed. (ex. Correct: 0 | Incorrect: 012,+0,-0)
Here is the regex I have created to perform the matching:
[^+-]0[^0-9]|[+-]?[1-9][0-9]*
Here is the expression I am testing:
(1 + 1 + 10)
The matches:
1
1
10)
And here is my question, why does it match '10)'?
The reason I used the above expression, instead of the much simpler one,
(0|[+-]?[1-9][0-9]*) is due to inability of the parser to recognise incorrect expressions such as 012.
The problem seems to occur only when before the ')' precedes the digit '0'. However if the '0' is preceded by two or more digits (ex. 100), then the ')' is not matched.
I know for a fact if I remove [^0-9] from the regex it doesn't match the ')'.
It matches 10( because 1 matches [^+-], 0 matches 0 and ( matches [^0-9].
The reason I used the above expression, instead of the much simpler one, (0|[+-]?[1-9][0-9]*) is due to inability of the parser to recognise incorrect expressions such as 012.
How so? Using the above regex, 012 would be recognized as two tokens: 0 and 12. Would this not cause an error in your parser?
Admittedly, this would not produce a very good error message, so a better approach might be to just use [0-9]+ as the regex and then use the action to check for a leading zero. That way 012 would be a single token and the lexer could produce an error or warning about the leading zero (I'm assuming here that you actually want to disallow leading zeros - not use them for octal literals).
Instead of a check in the action, you could also keep your regex and then add another one for integers with a leading zero (like 0[0-9]+ { warn("Leading zero"); return INT; }), but I'd go with the check in the action since it's an easy check and it keeps the regex short and simple.
PS: If you make - and + part of the integer token, something like 2+3 will be seen as the integer 2, followed by the integer +3, rather than the integers 2 and 3 with a + token in between. Therefore it is generally a better idea to not make the sign a part of the integer token and instead allow prefix + and - operators in the parser.
I have this string:
{"name": "Fancy HaXXor123Name","profession": 1,"race": 2,"map_id": 1052,"world_id": 268435461,"team_color_id": 0,"commander": false,"fov": 0.768}
I want to get an array back which includes the following information (from left to right from the string):
Fancy HaXXor123Name
1
2
1052
268435461
0
false
0.768
I tried to mess with RegExBuddy and got a promissing pattern which looks like this
(\d{1,}).(\d{1,})|(\d{1,})|(?i)"(.*?)"
This is what I got back
name
Fancy HaXXor123Name
profession
1
race
2
map_id
10
2
world_id
2684354
1
team_color_id
0
commander
fov
0
768
So there are large spaces between the informations, torn numbers and the false is missing. I can't fix this problem and I'm completely new to StringRegExp.
I'm using AutoIT which uses the PCRE RegExp-Engine (this is what think).
You may use a regex like the following:
"\s*:\s*(?:"\K[^"]*|\K[^][\s,{}]+)
See the regex demo
Details:
"\s*:\s* - a literal ", 0+ whitespaces, :, 0+ whitespaces
(?:"\K[^"]*|\K[^][\s,{}]+) - A non-capturing group matching 2 alternatives:
"\K[^"]* - a ", then \K zeros the text matched so far, and then matches 0+ chars other than " with [^"]*
\K[^][\s,{}]+ - \K drops the text matched so far, and [^][\s,{}]+ matches 1+ chars other than ], [, whitespace, ,, { and }.
I have a vcf file like this:
http://www.1000genomes.org/node/101
Here's the example from that site:
##fileformat=VCFv4.0
##fileDate=20090805
##source=myImputationProgramV3.1
##reference=1000GenomesPilot-NCBI36
##phasing=partial
##INFO=<ID=NS,Number=1,Type=Integer,Description="Number of Samples With Data">
##INFO=<ID=DP,Number=1,Type=Integer,Description="Total Depth">
##INFO=<ID=AF,Number=.,Type=Float,Description="Allele Frequency">
##INFO=<ID=AA,Number=1,Type=String,Description="Ancestral Allele">
##INFO=<ID=DB,Number=0,Type=Flag,Description="dbSNP membership, build 129">
##INFO=<ID=H2,Number=0,Type=Flag,Description="HapMap2 membership">
##FILTER=<ID=q10,Description="Quality below 10">
##FILTER=<ID=s50,Description="Less than 50% of samples have data">
##FORMAT=<ID=GT,Number=1,Type=String,Description="Genotype">
##FORMAT=<ID=GQ,Number=1,Type=Integer,Description="Genotype Quality">
##FORMAT=<ID=DP,Number=1,Type=Integer,Description="Read Depth">
##FORMAT=<ID=HQ,Number=2,Type=Integer,Description="Haplotype Quality">
#CHROM POS ID REF ALT QUAL FILTER INFO FORMAT NA00001 NA00002 NA00003
20 14370 rs6054257 G A 29 PASS NS=3;DP=14;AF=0.5;DB;H2 GT:GQ:DP:HQ 0|0:48:1:51,51 1|0:48:8:51,51 1/1:43:5:.,.
20 17330 . T A 3 q10 NS=3;DP=11;AF=0.017 GT:GQ:DP:HQ 0|0:49:3:58,50 0|1:3:5:65,3 0/0:41:3
20 1110696 rs6040355 A G,T 67 PASS NS=2;DP=10;AF=0.333,0.667;AA=T;DB GT:GQ:DP:HQ 1|2:21:6:23,27 2|1:2:0:18,2 2/2:35:4
20 1230237 . T . 47 PASS NS=3;DP=13;AA=T GT:GQ:DP:HQ 0|0:54:7:56,60 0|0:48:4:51,51 0/0:61:2
20 1234567 microsat1 GTCT G,GTACT 50 PASS NS=3;DP=9;AA=G GT:GQ:DP 0/1:35:4 0/2:17:2 1/1:40:3
After the header lines, each line has fields that contain genotypes starting with the 10th field. The 10th field is below the NA0001 heading; the 11th field is genotype NA0002, etc. I have a file with 123 different genotypes, so going from position 10 to 133 (NA0001 until NA0123). What is shown in these fields can be 0/0, 0/1, 0/2 .... till 8/9 for instance. Now I want to replace all the non-equal ones. So I would like to keep 0/0, 1/1, 2/2, etc. And replace 0/1, 0/2, 1/2, 4/5, 4/6 etc by ./.
I would like to write this in a C script. Thought about using sed y/regexp/replacement/ but no idea how to write all those unequal values in a regular expression. And on other positions in the file there could also be these values, so really only positions 10 till 133 should be replaced. And it needs to be replaced; I will be needing the rest of the file with the new values.
Hope it is clear. Anyone any idea how to do this?
This regex should do what you want: \s(\d)[|\/](?!\1)\d: Replace matches with ./.:
Breakdown:
\s(\d) matches a space followed by a single digit, capturing the digit in capture group #1
[|\/] matches a pipe or slash (since it seems that the VCF format allows either)
(?!\1)\d uses a negative lookahead to ensure that the next character is not the same as capture group #1, and matches the digit
Caveats:
I matched a leading space and trailing : to try to ensure it matches only the intended values. I couldn't work out a good way to limit it to fields 10 and after.
Example using perl:
perl -pe 's#\s(\d)[|/](?!\1)\d:# ./.:#g' testfile.vcf > testfile_afterchange.vcf
Note: I used # as the delimiter to avoid having to escape the / characters in the regex.
Could any of you pls explain the following code. For eg., Why D,d is used for?
NOT(REGEX(Phone, "\\D*?(\\d\\D*?){10}"))
The double backslashes are used because of Java's string escaping rules. The pure regex means:
\D*? # Match any number of non-digit characters (the "?" is useless here)
( # Match...
\d # a single digit
\D*? # optionally followed by any number of non-digits (again, useless "?")
){10} # Repeat the previous group 10 times.
So this regex matches any string that contains exactly ten digits (plus any number of other, non-digit characters).
If you're using the REGEX from the example in Salesforce, it's useless. It matches "this1234567890that" where "this" and "that" can be any value. I used: NOT( REGEX(Phone, "\([0-9]{3}\) [0-9]{3}-[0-9]{4}|\d{10}")) to accomplish the desired behavior.
My version translates to:
\\( # Match '('
[0-9]{3} # Match 3 digits
\\) # Match ')' followed by a space
[0-9]{3} # Match 3 digits
- # Match hyphen
[0-9]{4} # Match 4 more digits
|\\d{10} # or match 10 digits instead of all the previous