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Check for column name in a SqlDataReader object
...he loop doesn't. It is, however, a completely hypothetical situation right now so it's a very flimsy justification. Regardless, bear with me and see what you think.
Imagine a database that allowed you to "alias" columns within a table. Imagine that I could define a table with a column called "Emplo...
Difference between pre-increment and post-increment in a loop?
...
a++ is known as postfix.
add 1 to a, returns the old value.
++a is known as prefix.
add 1 to a, returns the new value.
C#:
string[] items = {"a","b","c","d"};
int i = 0;
foreach (string item in items)
{
Console.WriteLine(++...
How do I copy to the clipboard in JavaScript?
...y') return true if the document.execCommand('copy') will succeed if called now. Checking to ensure the command was called from a user-initiated thread and other requirements are met.
However as an example of browser compatibility issues, Google Chrome from ~April to ~October 2015 only returned tru...
How to write WinForms code that auto-scales to system font and dpi settings?
...sed on our research and testing so far. However, if some of you out there know better, we'd love to hear from you. (Please don't bother arguing we should switch to WPF... that's not an option right now.)
...
Retrieve the commit log for a specific line in a file?
...:22:22 -0800 160) "$browser_path" $NEWTAB "$@" &
And you want to know the history of what is now line 155.
Then, use git log. Here, -L 155,155:git-web--browse.sh means "trace the evolution of lines 155 to 155 in the file named git-web--browse.sh".
$ git log --pretty=short -u -L 155,155:gi...
A simple explanation of Naive Bayes Classification
...ular input dataset (training set) so that later on we may test them for unknown inputs (which they have never seen before) for which they may classify or predict etc (in case of supervised learning) based on their learning. This is what most of the Machine Learning techniques like Neural Networks, S...
Firebug says “No Javascript on this page”, even though JavaScript does exist on the page
...
This should be the answer now, Firebug is dead.
– Steve Hibbert
Nov 23 '16 at 15:59
11
...
data.frame rows to a list
...mp;
}
res.attr("names") = x.attr("row.names");
return res;
}
Now caompare with purrr:
benchmark(
purrr = by_row(x, function(v) list(v)[[1L]], .collate = "list")$.out,
rcpp = df2list(x)
)
Results:
Benchmark summary:
Time units : milliseconds
expr n.eval min lw.qu median m...
Most efficient method to groupby on an array of objects
...ailed to understand how in the world does it work starting from ...result. Now I can't sleep because of that.
– user3307073
Mar 29 '19 at 9:26
...
Can a local variable's memory be accessed outside its scope?
...e going to die in an explosion while you are sneaking around.
You don't know what is going to happen; when you checked out of the hotel and stole a key to illegally use later, you gave up the right to live in a predictable, safe world because you chose to break the rules of the system.
C++ is not...