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Count the number of occurrences of a string in a VARCHAR field?
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The ROUND here is unnecessary. assume a string of length x with n occurrences of'value. LENGTH(description) - LENGTH( REPLACE ( description, "value", "") ) will always give you n*length("value"), diving that by length of value will always leave a whole number n. N...
How do I get the last character of a string?
How do I get the last character of a string?
11 Answers
11
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Is std::vector so much slower than plain arrays?
...peline stages per array accesses. So the vector looks like it is using one extra instruction per accesses.
– Martin York
Sep 8 '10 at 3:25
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Why does this code using random strings print “hello world”?
...e share your code. I would greatly appreciate it.
public static void main(String[] args) {
long time = System.currentTimeMillis();
generate("stack");
generate("over");
generate("flow");
generate("rulez");
System.out.println("Took " + (System.currentTimeMillis() - time) + " ...
Find and extract a number from a string
I have a requirement to find and extract a number contained within a string.
29 Answers
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Difference between malloc and calloc?
..., for example since the parts of hash which are empty aren't backed by any extra memory (pages); they happily point to the single zero-initialized page, which can be even shared between processes.
Any write to virtual address is mapped to a page, if that page is the zero-page, another physical page...
What's the best method in ASP.NET to obtain the current domain?
...Aagaard, but you could always make one locally. I do that for most "magic" strings and numbers. For that matter, you would then use string.Empty instead of "" in Carlos' answer ;)
– vbullinger
Aug 10 '12 at 21:34
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What does the explicit keyword mean?
...cidental construction that can hide bugs.
Contrived example:
You have a MyString(int size) class with a constructor that constructs a string of the given size. You have a function print(const MyString&), and you call print(3) (when you actually intended to call print("3")). You expect it to p...
snprintf and Visual Studio 2010
...tes at most buf_size - 1 characters to a buffer. The resulting
character string will be terminated with a null character, unless
buf_size is zero. If buf_size is zero, nothing is written and
buffer may be a null pointer. The return value is the number of
characters that would have been writt...
Avoid trailing zeroes in printf()
...01357
breaks it.
What you can do is to sprintf("%.20g") the number to a string buffer then manipulate the string to only have N characters past the decimal point.
Assuming your number is in the variable num, the following function will remove all but the first N decimals, then strip off the trai...