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How do you allow spaces to be entered using scanf?
...hout specifying a field width. You should also check the return values for errors:
#include <stdio.h>
#define NAME_MAX 80
#define NAME_MAX_S "80"
int main(void)
{
static char name[NAME_MAX + 1]; // + 1 because of null
if(scanf("%" NAME_MAX_S "[^\n]", name) != 1)
{
fpu...
How to disable and re-enable console logging in Python?
...EBUG,
'info': logging.INFO,
'warning': logging.WARNING,
'error': logging.ERROR,
'critical': logging.CRITICAL
So, if you set your_level to logging.CRITICAL, you will get only critical messages sent by:
logging.critical('This is a critical error message')
Setting your_lev...
Checking images for similarity with OpenCV
...images ( same size/orientation )
// Compare two images by getting the L2 error (square-root of sum of squared error).
double getSimilarity( const Mat A, const Mat B ) {
if ( A.rows > 0 && A.rows == B.rows && A.cols > 0 && A.cols == B.cols ) {
// Calculate the L2 r...
Getting a File's MD5 Checksum in Java
...eInputStream? Sounds like you used FileInputStream, which would cause this error.
– erickson
Dec 17 '12 at 17:16
...
difference between foldLeft and reduceLeft in Scala
...
For reference, reduceLeft will error if applied to an empty container with the following error.
java.lang.UnsupportedOperationException: empty.reduceLeft
Reworking the code to use
myList foldLeft(List[String]()) {(a,b) => a+b}
is one potential op...
Can pandas automatically recognize dates?
...
Did not work for me, I got the following error: TypeError: strptime() argument 1 must be str, not float
– Jean Paul
May 4 '17 at 12:36
...
How to concatenate strings of a string field in a PostgreSQL 'group by' query?
... ') AS semi_colon_separated_names FROM things;
But this will be a syntax error:
SELECT string_agg(name, '; ' ORDER BY name) AS semi_colon_separated_names FROM things;
--> ERROR: syntax error at or near "ORDER"
Tested on PostgreSQL 8.3.
CREATE FUNCTION string_agg_transfn(text, text, text)
...
How do I verify/check/test/validate my SSH passphrase?
... ssh-add requires admin rights on the machine, I think. I am getting an error: "Could not open a connection to your authentication agent."
– IgorGanapolsky
Feb 12 '14 at 21:15
...
TypeError: 'str' does not support the buffer interface
The above python code is giving me following error:
7 Answers
7
...
Setting up FTP on Amazon Cloud Server [closed]
...hat means that after rebooting your EC2 instance, you'll feel a moment of terror when FTP seems to be broken - but in reality, it's just not running!. Here's a handy way to fix that:
> sudo chkconfig --level 345 vsftpd on
Alternatively, if you are using redhat, another way to manage your serv...