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Check whether a value is a number in JavaScript or jQuery [duplicate]
...!isNaN(+n) && isFinite(n) since for a numeric string with trailing letters the parseFloat | parseInt will return true and the second check isFInite will return false. While with unary + it will fail immediately.
– Arman McHitarian
May 20 '13 at 16:29
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Get the last 4 characters of a string [duplicate]
...r(reversed(str(p))).split(' ', 1))[0])], len(str(p)), 2) to get the last n letters of p based on the first space. Useless and doesn't even work.
– Benj
Apr 9 '19 at 16:38
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What do numbers using 0x notation mean?
...r 0x6400 is 25600.
6 * 16^3 + 4 * 16^2 = 25600
For an example including letters (also used in hexadecimal notation where A = 10, B = 11 ... F = 15)
The number 0x6BF0 is 27632.
6 * 16^3 + 11 * 16^2 + 15 * 16^1 = 27632
24576 + 2816 + 240 = 27632
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Set value to NULL in MySQL
...s most likely because mysql differentiates between null written in capital letters and null written in small case.
So if you used an update statement with null, it would not work. If you set it to NULL, it would work fine.
Thanks.
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What is android:ems attribute in Edit Text? [duplicate]
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An "em" is a typographical unit of width, the width of a wide-ish
letter like "m" pronounced "em". Similarly there is an "en".
Similarly "en-dash" and "em-dash" for – and —
-Tim Bray
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How to create empty data frame with column names specified in R? [duplicate]
...nodata <- as.data.frame(setNames(replicate(5,numeric(0), simplify = F), letters[1:5]))
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How to get current PHP page name [duplicate]
...ename($_SERVER['PHP_SELF']) ) ) and Capitalize Words with ucwords or first letter using ucfirst. Maybe somebody will need this...
– Andrew Surdu
Sep 6 '13 at 11:34
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Can a relative sitemap url be used in a robots.txt?
....yourdomain.com/sitemap.xml
Note:
Don't forgot to capitalise the first letter in "sitemap"
Don't forgot to put space after "Sitemap:"
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How to convert 'binary string' to normal string in Python3?
... @lyomi, I used ascii because the given string was made with ascii letters. You don't need to specify encoding if the encoding is utf-8 (default in Python 3.x according to str.encode, bytes.decode doc-string)
– falsetru
Mar 30 '16 at 8:28
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Regex that accepts only numbers (0-9) and NO characters [duplicate]
I need a regex that will accept only digits from 0-9 and nothing else. No letters, no characters.
1 Answer
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