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Which kind of pointer do I use when?
...ss template auto_ptr is deprecated. [ Note: The class template unique_ptr (20.7.1) provides a better solution. —end note ]
No ownership:
Use dumb pointers (raw pointers) or references for non-owning references to resources and when you know that the resource will outlive the referencing object /...
How to output numbers with leading zeros in JavaScript [duplicate]
... a way to round left of the decimal? for example 5 becomes 05 if I specify 2 places
6 Answers
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How do you connect to multiple MySQL databases on a single webpage?
...For example:
$dbh1 = mysql_connect($hostname, $username, $password);
$dbh2 = mysql_connect($hostname, $username, $password, true);
mysql_select_db('database1', $dbh1);
mysql_select_db('database2', $dbh2);
Then to query database 1 pass the first link identifier:
mysql_query('select * from tabl...
How to calculate the number of days between two dates? [duplicate]
...
const oneDay = 24 * 60 * 60 * 1000; // hours*minutes*seconds*milliseconds
const firstDate = new Date(2008, 1, 12);
const secondDate = new Date(2008, 1, 22);
const diffDays = Math.round(Math.abs((firstDate - secondDate) / oneDay));
...
Hiding elements in responsive layout?
...Class names : .visible-sm-block, hidden-sm)
Medium devices
Desktops (≥992px) (Class names : .visible-md-block, hidden-md)
Large devices
Desktops (≥1200px) (Class names : .visible-lg-block, hidden-lg)
For more information : http://getbootstrap.com/css/#responsive-utilities
Below is deprecat...
What is the difference between map and flatMap and a good use case for each?
... into a single RDD of results.
rdd.flatMap(_.split(" ")).collect
res2: Array[String] = Array("Roses", "are", "red", "Violets", "are", "blue")
We have multiple words per line, and multiple lines, but we end up with a single output array of words
Just to illustrate that, flatMapping from a c...
How do I activate C++ 11 in CMake?
...e cmake_minimum_required to require CMake 3.0 or later, or
Set policy CMP0025 to NEW with the following code at the top of your CMakeLists.txt file before the project command:
# Fix behavior of CMAKE_CXX_STANDARD when targeting macOS.
if (POLICY CMP0025)
cmake_policy(SET CMP0025 NEW)
endif ()
...
How to use sed to remove the last n lines of a file
...
22 Answers
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