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Cancellation token in Task constructor: why?
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Eliahu Aaron
3,15122 gold badges2020 silver badges3232 bronze badges
answered Sep 14 '10 at 21:38
Max GalkinMax Galkin
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Why does the MongoDB Java driver use a random number generator in a conditional?
...hat this piece of code amounts to
if (!_ok && Math.random() <= 0.1)
return res;
The commit that originally introduced this logic had
if (_ok == true) {
_logger.log( Level.WARNING , "Server seen down: " + _addr, e );
} else if (Math.random() < 0.1) {
_logger.log( Level.WARNING ...
How to create a shared library with cmake?
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220
Always specify the minimum required version of cmake
cmake_minimum_required(VERSION 3.9)
You ...
How to use ADB to send touch events to device using sendevent command?
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edited Oct 20 '15 at 15:25
Yaron
1,05111 gold badge1414 silver badges2929 bronze badges
an...
Display open transactions in MySQL
...a connection breaks
From the MySQL docs: http://dev.mysql.com/doc/refman/5.0/en/mysql-tips.html
4.5.1.6.3. Disabling mysql Auto-Reconnect
If the mysql client loses its connection to the server while sending a statement, it immediately and automatically tries to reconnect once to the server ...
Conveniently Declaring Compile-Time Strings in C++
...ng to match the elegance of Scott Schurr's str_const presented at C++ Now 2012. It does require constexpr though.
Here's how you can use it, and what it can do:
int
main()
{
constexpr str_const my_string = "Hello, world!";
static_assert(my_string.size() == 13, "");
static_assert(my_st...
How to check if a database exists in SQL Server?
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edited Jun 8 '12 at 13:50
SteveC
12.8k2020 gold badges8282 silver badges143143 bronze badges
answered ...
Android Studio rendering problems
I'm using Android Studio 0.2.3 and when opened an activity layout normally, the preview should appear on the right side, so that I can switch between Text and Design mode, which should again show the preview of the layout.
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Run Cron job every N minutes plus offset
*/20 * * * *
3 Answers
3
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How can I use a file in a command and redirect output to the same file without truncating it?
...can use a temporary file though.
#!/bin/sh
tmpfile=$(mktemp)
grep -v 'seg[0-9]\{1,\}\.[0-9]\{1\}' file_name > ${tmpfile}
cat ${tmpfile} > file_name
rm -f ${tmpfile}
like that, consider using mktemp to create the tmpfile but note that it's not POSIX.
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