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Difference between a Seq and a List in Scala
... RE "Java has no equivalent to immutable collections", although String is not a collection, it is an example of immutable classes familiar to Java programmers.
– huynhjl
Jun 3 '12 at 2:19
...
What are the uses of “using” in C#?
...
Things like this:
using (var conn = new SqlConnection("connection string"))
{
conn.Open();
// Execute SQL statement here on the connection you created
}
This SqlConnection will be closed without needing to explicitly call the .Close() function, and this will happen even if an exce...
How to write a multidimensional array to a text file?
...[i,:,:] in this case
for data_slice in data:
# The formatting string indicates that I'm writing out
# the values in left-justified columns 7 characters in width
# with 2 decimal places.
np.savetxt(outfile, data_slice, fmt='%-7.2f')
# Writing out a brea...
Calling shell functions with xargs
... You can simplify this by including the argument from xargs in the command string for bash with bash -c 'echo_var "{}"'. So you do not need the _ {} at the end.
– phobic
Jun 2 '16 at 8:57
...
Cookies vs. sessions
...r the sake of creating a login system for my website, I read about cookies and sessions and their differences (cookies are stored in the user's browser and sessions on the server). At that time, I preferred cookies (and who does not like cookies?!) and just said: "who cares? I don't have any good de...
Define make variable at rule execution time
... tar -C $(TMP) cf $@ .
rm -rf $(TMP)
The eval function evaluates a string as if it had been typed into the makefile manually. In this case, it sets the TMP variable to the result of the shell function call.
edit (in response to comments):
To create a unique variable, you could do the follo...
jQuery to retrieve and set selected option value of html select element
I am attempting to retrieve and set the selected value of a select element (drop down list) with jQuery.
9 Answers
...
How to print to console when using Qt
...t useful:
#include <QTextStream>
QTextStream out(stdout);
foreach(QString x, strings)
out << x << endl;
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Give all the permissions to a user on a DB
...-- use instead of EXECUTE to see generated commands
EXECUTE (
SELECT string_agg(format('GRANT USAGE ON SCHEMA %I TO my_user', nspname), '; ')
FROM pg_namespace
WHERE nspname <> 'information_schema' -- exclude information schema and ...
AND nspname NOT LIKE 'pg\_%' -...
NTFS performance and large volumes of files and directories
...erformance(int numFilesInDir, bool testDirs) {
var files = new List<string>();
var dir = Path.GetTempPath() + "\\Sub\\" + Guid.NewGuid() + "\\";
Directory.CreateDirectory(dir);
Console.WriteLine("prepare...");
const string FILE_NAME = "\\file.txt";
for (int i = 0; i <...