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Mod of negative number is melting my brain
...ould write it as
int mod(int x, int m) {
int r = x%m;
return r<0 ? r+m : r;
}
or variants thereof.
The reason it works is that "x%m" is always in the range [-m+1, m-1]. So if at all it is negative, adding m to it will put it in the positive range without changing its value modulo m.
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What do the different readystates in XMLHttpRequest mean, and how can I use them?
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The full list of readyState values is:
State Description
0 The request is not initialized
1 The request has been set up
2 The request has been sent
3 The request is in process
4 The request is complete
(from https://www.w3schools.com/js/js_ajax_http_respo...
How do I set a variable to the output of a command in Bash?
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vstepaniuk
27022 silver badges88 bronze badges
answered Jan 10 '11 at 21:04
Andy LesterAndy Lester
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Crontab Day of the Week syntax
In crontab does the Day of the Week field run from 0 - 6 or 1 -7 ?
3 Answers
3
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Android View.getDrawingCache returns null, only null
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10 Answers
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MySQL Update Inner Join tables query
I have no idea what the problem is. Using MySQL 5.0 I get a compile error when attempting to run the following MySQL update query:
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How do I read / convert an InputStream into a String in Java?
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edited May 21 '18 at 13:09
Marko Zajc
14811 silver badge1313 bronze badges
answered Nov 21 '08 at 16:5...
Renaming columns in pandas
...he .columns attribute:
>>> df = pd.DataFrame({'$a':[1,2], '$b': [10,20]})
>>> df.columns = ['a', 'b']
>>> df
a b
0 1 10
1 2 20
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How to implement has_many :through relationships with Mongoid and mongodb?
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edited Aug 13 '11 at 20:31
answered Aug 13 '11 at 20:06
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Explain the use of a bit vector for determining if all characters are unique
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int checker is used here as a storage for bits. Every bit in integer value can be treated as a ...