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How to get the input from the Tkinter Text Widget?
...-1c' are necessary for it to be a single string. 'end' is an alias for the index after the last character. So if 'end' was '3.8' then 'end-1c' would be '3.7'. I want to again recommend reviewing: Text widget indices.
– Honest Abe
Feb 14 '13 at 4:50
...
What does Docker add to lxc-tools (the userspace LXC tools)?
... containers is a bit like trying to use Git with just commands like update-index and read-tree, without familiar tools like add, commit, and merge. Docker provides that layer of "porcelain" over the "plumbing" of LXC, enabling you to work with higher level concepts and worry less about the low-level...
MongoDB/NoSQL: Keeping Document Change History
...
Will this affect performance if indexed fields represented as arrays?
– DmitriD
Jun 14 '17 at 2:28
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How do I (or can I) SELECT DISTINCT on multiple columns?
...ical to the human eye):
(123, NULL)
(123, NULL)
Also passes in a unique index and almost anywhere else, since NULL values do not compare equal according to the SQL standard. See:
Create unique constraint with null columns
OTOH, GROUP BY, DISTINCT or DISTINCT ON () treat NULL values as equal. ...
Conveniently Declaring Compile-Time Strings in C++
..."world", "");
// constexpr char x = world[5]; // Does not compile because index is out of range!
}
It doesn't get much cooler than compile-time range checking!
Both the use, and the implementation, is free of macros. And there is no artificial limit on string size. I'd post the implementation ...
PHP Session Fixation / Hijacking
...ypically in PHP it's done by giving them a url like http://www.example.com/index...?session_name=sessionid. Once the attacker gives the url to the client, the attack is the same as a session hijacking attack.
There are a few ways to prevent session fixation (do all of them):
Set session.use_trans...
How do I obtain a Query Execution Plan in SQL Server?
...s:
Because there are so many factors involved (ranging from the table and index schema down to the data stored and the table statistics) you should always try to obtain an execution plan from the database you are interested in (normally the one that is experiencing a performance problem).
You can'...
Sticky and NON-Sticky sessions
...A, B and C behind the load balancer, it is possible that www.mywebsite.com/index.jsp is served from server A, www.mywebsite.com/login.jsp is served from server B and www.mywebsite.com/accoutdetails.php are served from server C.
Now, if the requests are being served from (physically) 3 different ser...
How do I replace NA values with zeros in an R dataframe?
...ring of other helpful tidyverse replacement approaches
Locationally:
index mutate_at(c(5:10), ~replace(., is.na(.), 0))
direct reference mutate_at(vars(var5:var10), ~replace(., is.na(.), 0))
fixed match mutate_at(vars(contains("1")), ~replace(., is.na(.), 0))
or in place of contains(), ...
How can I repeat a character in Bash?
... '/dev/null' on the following
# line with a prefix path to which a running index starting with 1 will
# be appended for each test run; e.g., outFilePrefix='outfile', which
# will produce outfile1, outfile2, ...
outFilePrefix=/dev/null
{
outFile=$outFilePrefix
ndx=0
title '[M, P] printf %.s=...