sum function usage for string
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Hello all,
I was working on an entry-level question "Number of 1s in a binary string", my answer was converting the number to string and use strfind function '1'.
Saw a very clean answer , I don't quite understand this. If x is a string, what can we get x-'0'
y = sum(x-'0')
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Star Strider
2020-9-14
0 个投票
Subtracting ASCII 0 from an ASCII string converts the string to numeric values.
There is some controversy as to that being ‘correct’, however it definitely does work! (It takes advantage of the fact that everything in a computer is stored as numeric representations.)
2 个评论
Xuande Zhang
2020-9-14
Star Strider
2020-9-14
As always, my pleasure!
As I mentioned, it is a bit controversial.
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