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 ...

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 …

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 <- …

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 …

Feb 3, 2018 · Say I have a multi-digit integer in C. I want to break it up into single-digit integers. 123 would turn into 1, 2, and 3. How can I do this, especially if I don't know how many digits the integer...

Sep 23, 2016 · This solution solves many more "digit of a number" problems than the one using integer division and modulus. Try to find the leading (left-most) digit of the following numbers using both: …

Regular expression to match standard 10 digit phone number Asked 12 years, 8 months ago Modified 1 year, 9 months ago Viewed 1.0m times

Getting each individual digit from a whole integer Asked 15 years, 6 months ago Modified 1 year, 7 months ago Viewed 171k times

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 …

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 …