regex - Grep regular expression for digits in character string of ...
I need some way to find words that contain any combination of characters and digits but exactly 4 digits only, and at least one character. EXAMPLE: a1a1a1a1 // Match 1234 // NO ...
What's the difference between str.isdigit (), isnumeric () and ...
s.isdigit() s.isnumeric() s.isdecimal() I always get as output either all True or all False for each value of s (which is a string). What's the difference between the three? Can you provide an example that gives …
python - Does "\d" in regex mean a digit? - Stack Overflow
123 Only 1 and 3 are matched by the regex \d; 2 is not. Generally for a sequence of digit numbers without other characters in between, only the odd order digits are matches, and the even order digits …
R regular expressions: unexpected behavior of " [:digit:]"
Nov 1, 2013 · I'd like to extract elements beginning with digits from a character vector but there's something about POSIX regular expression syntax that I don't understand. I would think that vec <- …
How to Display The last 4 digit of numbers and replace the rest of the ...
Nov 25, 2018 · How to displays the last four digits of the Numbers in this format: XXXX-XXXX-XXXX-1234. In other words, use Xs for the first 12 digits of the card number and actual numbers for the last …
Sum up a number until it becomes 1 digit JS - Stack Overflow
What is the most compact possible way to sum up a number in javascript until there is only one digit left. For example: You input 5678 then the script adds it together (5+6+7+8) and gets 26, but since its …
Getting each individual digit from a whole integer
Getting each individual digit from a whole integer Asked 15 years, 7 months ago Modified 1 year, 7 months ago Viewed 171k times
Difference between Char.IsDigit() and Char.IsNumber() in C#
Feb 26, 2013 · This contrasts with IsDigit, which determines if a Char is a radix-10 digit. Valid numbers are members of the following categories in UnicodeCategory: DecimalDigitNumber Decimal digit …
Sorting 1 million 8-decimal-digit numbers with 1 MB of RAM
Oct 21, 2012 · 1M of RAM means 2^20 bytes? And how many bits are in a byte on this architecture? And is the "million" in "1 million 8 digit decimal numbers" a SI million (10^6)? What is a 8 digit …
Regex for matching certain numbers of digits - Stack Overflow
Nov 1, 2012 · The following regex will match the range 9-11 digits: /\d{9,11}/ What is the best way to write a regex matching exactly 9 or 11 digits (excluding 10)? Using the pattern attribute of an input …