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I am learning C++ and I found something that I can't understand: Output buffers can be explicitly flushed to force the buffer to be written. By default, reading cin flushes cout ; cout is also flushed when the program ends normally. So flushing the buffer (for example an output buffer): does this clear the buffer by deleting everything in it or does it clear the buffer by outputting everything in it? Or does flushing the buffer mean something completely different? David Heffernan Consider writing to a file. This is an expensive operation. If in your code you write one byte at a time, then each

class test{ public static void main(String args[]){ int a = 011; System.out.println(a); } } Why I am getting 9 as output instead of 011 ? How can I get 011 as output? The JLS 3.10.1 describes 4 ways to define integers. An integer literal may be expressed in decimal (base 10), hexadecimal (base 16), octal (base 8), or binary (base 2). An octal numeral consists of a digit 0 followed by one or more of the digits 0 through 7 ... A decimal numeral is either the single digit 0, representing the integer zero, or consists of an digit from 1 to 9 optionally followed by one or more digits from 0 to 9 ..

I'm executing some SQL statements in batch (using the mysql command-line binary). I want one of my several SELECT statements to not print the column headers, just the selected records. Is this possible? Invoke mysql with the -N (the alias for -N is --skip-column-names ) option: mysql -N ... use testdb; select * from names; +------+-------+ | 1 | pete | | 2 | john | | 3 | mike | +------+-------+ 3 rows in set (0.00 sec) Credit to ErichBSchulz for pointing out the -N alias. To remove the grid (the vertical and horizontal lines) around the results use -s ( --silent ). Columns are separated with a

I have a set of lists that contain both strings and float numbers, such as: import numpy as num NAMES = num.array(['NAME_1', 'NAME_2', 'NAME_3']) FLOATS = num.array([ 0.5 , 0.2 , 0.3 ]) DAT = num.column_stack((NAMES, FLOATS)) I want to stack these two lists together and write them to a text file in the form of columns; therefore, I want to use numpy.savetxt (if possible) to do this. num.savetxt('test.txt', DAT, delimiter=" ") When I do this, I get the following error: >>> num.savetxt('test.txt', DAT, delimiter=" ") Traceback (most recent call last): File "<stdin>", line 1, in <module> File "