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When should static_cast, dynamic_cast, const_cast and reinterpret_cast be used?
...st, reinterpret_cast.
(Also referes this to understand the explaination : http://www.cplusplus.com/doc/tutorial/typecasting/)
static_cast :
OnEventData(void* pData)
{
......
// pData is a void* pData,
// EventData is a structure e.g.
// typedef struct _EventData {
// std::strin...
How to split a delimited string into an array in awk?
How to split the string when it contains pipe symbols | in it.
I want to split them to be in array.
9 Answers
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Hidden features of C
...iltin_expect((x),1)
#define unlikely(x) __builtin_expect((x),0)
see: http://kerneltrap.org/node/4705
What I like about this is that it also adds some expressiveness to some functions.
void foo(int arg)
{
if (unlikely(arg == 0)) {
do_this();
return;
}
do_t...
Is there a way to avoid null check before the for-each loop iteration starts? [duplicate]
Every time I have to iterate over a collection I end up checking for null, just before the iteration of the for-each loop starts. Like this:
...
foreach with index [duplicate]
Is there a C# equivalent of Python's enumerate() and Ruby's each_with_index ?
10 Answers
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ISO time (ISO 8601) in Python
I have a file. In Python, I would like to take its creation time, and convert it to an ISO time (ISO 8601) string while preserving the fact that it was created in the Eastern Time Zone (ET) .
...
Android View shadow
...<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<!--the shadow comes from here-->
<item
android:bottom="0dp"
android:drawable="@android:drawable/dialog_holo_light_frame"
android:left="...
Search All Fields In All Tables For A Specific Value (Oracle)
Is it possible to search every field of every table for a particular value in Oracle?
16 Answers
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How to define a function in ghci across multiple lines?
...e a pretty new feature. You may need to upgrade GHC.
Edit: confirmed, see http://www.haskell.org/ghc/docs/6.8.2/html/users_guide/release-6-8-2.html
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How can I select rows with most recent timestamp for each key value?
...rows, where right.id is null. Voila, you got the latest entry per sensor.
http://sqlfiddle.com/#!9/45147/37
SELECT L.* FROM sensorTable L
LEFT JOIN sensorTable R ON
L.sensorID = R.sensorID AND
L.timestamp < R.timestamp
WHERE isnull (R.sensorID)
But please note, that this will be very resource...