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Using sed, how do you print the first 'N' characters of a line?
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Paulo Mattos
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answered Feb 11 '09 at 20:42
Paul TomblinPaul Tomb...
Why does X[Y] join of data.tables not allow a full outer join, or a left join?
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edited Jan 4 '19 at 12:48
Henrik
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Django self-referential foreign key
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answered Mar 8 '13 at 2:25
Jared ForsythJared Forsyth
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How to run a function when the page is loaded?
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8 Answers
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Do I need to manually close an ifstream?
...e end of a function you can always use a nested scope.
In the standard (27.8.1.5 Class template basic_ifstream), ifstream is to be implemented with a basic_filebuf member holding the actual file handle. It is held as a member so that when an ifstream object destructs, it also calls the destructor o...
Difference between exit(0) and exit(1) in Python
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manojldsmanojlds
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Hex representation of a color with alpha channel?
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85
In CSS 3, to quote from the spec, "there is no hexadecimal notation for an RGBA value" (see CSS...
Conditional HTML Attributes using Razor MVC3
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answered Nov 9 '11 at 21:08
Erik PorterErik Porter
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ERROR: permission denied for sequence cities_id_seq using Postgres
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384
Since PostgreSQL 8.2 you have to use:
GRANT USAGE, SELECT ON SEQUENCE cities_id_seq TO www;
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How do you find the sum of all the numbers in an array in Java?
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In java-8 you can use streams:
int[] a = {10,20,30,40,50};
int sum = IntStream.of(a).sum();
System.out.println("The sum is " + sum);
Output:
The sum is 150.
It's in the package java.util.stream
import java.util.stream.*;
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