Regular Expressions
Source: xkcd
Resources for learning regular expressions -
- Wikipedia
- Beginner's Guide - Blog Post
This is the best post to learn regular expressions fast with all the basics.
- Regular Expression info
Advanced in-depth tutorial about all regular expression topics
Online Practice tools -
- Regex101 (I personally prefer this, as this also explains and has all different regex engines.)
- Regexr
Different Regex Engines -
- C#
- Ruby
- PHP
- Perl (PCRE - Perl Compatible Regular Expressions)
- Java
- JavaScript
- Python
Advanced Topics -
- Conditionals
- Atomic Groups
- Look Arounds [IMP]
- Named Capture
- Inline modifiers
- Subroutines
- Recursive expressions
- Predefined subroutines
- Branch reset
- Inline comments
Cheat Sheets -
- https://dzone.com/refcardz/regular-expressions
- http://www.rexegg.com/regex-quickstart.html
Online Challenges -
| Link |
Complexity |
| https://www.hackerrank.com/domains/regex/re-introduction |
Beginner - Intermediate |
| https://regex.sketchengine.co.uk/ |
Beginner - Advanced |
| https://regexcrossword.com/ |
Beginner - Advanced |
| https://regexone.com/ |
Beginner |
| http://play.inginf.units.it/#/ |
Advanced |
Regex Crossword
My Profile - Regex Crossword Profile
Rank - 45 Out Of 47450
Number of Puzzles Solved - 392
Top Player Stats and Ranking
Underscore '_' represents SPACE
1. Tutorial
| Level |
Name |
Solution |
| 1 |
The OR symbol |
A |
| 2 |
A Range of characters |
B |
| 3 |
Characters NOT to include |
C |
| 4 |
Zero or more |
A A |
| 5 |
Zero or one |
A B |
| 6 |
One or more |
A A |
| 7 |
Backreference |
A A |
| 8 |
Specific amount |
A A |
| 9 |
Space |
' ' |
2. Beginner
| Level |
Name |
Solution |
| 1 |
Beatles |
HELP |
| 2 |
Naughty |
BOBE |
| 3 |
Ghost |
OOOO |
| 4 |
Symbolism |
**// |
| 5 |
Airstrip One |
1984 |
3. Intermediate
| Level |
Name |
Solution |
| 1 |
Always remember |
ATO WEL |
| 2 |
Johnny |
WA LK ER |
| 3 |
Earth |
FOR TY- TWO |
| 4 |
Encyclopedia |
DON TPA NIC |
| 5 |
Technology |
TURN OFFA NDON |
4. Experienced
| Level |
Name |
Solution |
| 1 |
Royal Dinner |
FOODF ITFOR AKING |
| 2 |
Regular Workout |
REGUL AREXP RESSI ONOFT HEDAY |
| 3 |
We apologise for the inconvenience |
ANSWE RTHEG REATQ UESTI ONNOW |
| 4 |
Questionable |
?!!!? !?!?! !!?!! !?!?! ?!!!? |
| 5 |
Hamlet |
TOBEO RNOTT OBEAR EGULA RREGX |
5. Palindromeda
| Level |
Name |
Solution |
| 1 |
Ten o'clock |
NET EWE TEN |
| 2 |
Third |
GEL EYE LEG |
| 3 |
Horn |
RATS ABUT TUBA STAR |
| 4 |
Open the lid |
TRAP RAJA AJAR PART |
| 5 |
Time Walker |
STEP TIME EMIT PETS |
6. Double Cross
| Level |
Name |
Solution |
| 1 |
Telekinesis |
ET |
| 2 |
GMC Vandura |
A-T EAM |
| 3 |
Bat Man |
NOS FER ATU |
| 4 |
Big Mac |
PUL P_F ICT ION |
| 5 |
The Lektor Device |
FRO M_R USS IA_ WIT H_L OVE |
7. Cities
| Level |
Name |
Solution |
| 1 |
Pisco Sour |
LI MA |
| 2 |
Roman Latin |
LON DIN IUM |
| 3 |
Big and hot |
NEW_ YORK |
| 4 |
Alpha World City |
KUAL A_LUM PUR |
| 5 |
Home |
_CO PEN HAG EN_ |
8. Volapuk
| Level |
Name |
Solution |
| 1 |
Bal |
GPO ZKS |
| 2 |
Tel |
M0Y P.H P\2 |
| 3 |
Kil |
M?BO SNUO ?PYO |
| 4 |
Fol |
70MW /DBE 1_SP :XNA |
| 5 |
Lul |
TRAN7 24L?_ AM5$L -WE3O DEFF? |
9. Hamlet
| Level |
Name |
Solution |
| 1 |
The Ghost |
REVENGE _HIS_FO UL_AND_ MOST_UN NATURAL _MURDER |
| 2 |
Hamlet and Ophelia |
TO_BE,_ OR_NOT_ TO_BE,_ THAT_IS _THE_QU ESTION_ |
| 3 |
The Play |
HE_POIS ONS_HIM _I'_THE _GARDEN |
| 4 |
Laertes |
TOO_MUC H_OF_WA TER_HAS T_THOU, _POOR_O PHELIA! |
| 5 |
Memento |
ALAS,_ POOR_Y ORICK! _..._A _FELLO W_OF_I NFINIT E_JEST |
| 6 |
The End |
NOW_C RACKS _A_NO BLE_H EART. _GOOD _NIGH T,_SW EET_P RINCE |
10. Hexagonal
| Level |
Name |
Solution |
| 1 |
Buzz buzz |
H IV E |
| 2 |
Garden |
FL RO! WE |
| 3 |
Pollen |
SES A"ED .B.B_ I_D" R.N |
| 4 |
Stationary |
S_E_ ASVTL "OET"L B_S=___ YSOEIY VTTEM FR_A |
| 5 |
Winnie |
'NIB THOSE TFA__W TH_ISNG BEEEEEEE O_RR_HO _STE__ KING_ VNR. |
Player Puzzles
| Sr.No. |
Name |
Created By |
Solution |
| 1 |
Binary |
#6450 |
11001 11100 01010 01111 00001 |
| 2 |
Letter |
#2009 |
TH_IS I_S_L _ETT_ _____ _ERA_ |
| 3 |
Morse |
#2009 |
.-. . --. . -..- -.-. .-. -.-. .-. --- ... ... .-- --- .-. -.. .. ... -.-. --- --- .-.. (REGEXCRCROSSWORDISCOOL) |
| 4 |
Regex Picross |
#3162 |
 |
| 5 |
Unique Puzzle |
#21964 |
8259173064! |
| 6 |
Checkmate, Atheists |
#14171 |
 |
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deepaksood619
deepaksood619