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Regular cast vs. static_cast vs. dynamic_cast [duplicate]
...and additions. static_cast performs no runtime checks. This should be used if you know that you refer to an object of a specific type, and thus a check would be unnecessary. Example:
void func(void *data) {
// Conversion from MyClass* -> void* is implicit
MyClass *c = static_cast<MyClass*...
What is the difference between Amazon SNS and Amazon SQS?
...NS supports several end points such as email, sms, http end point and SQS. If you want unknown number and type of subscribers to receive messages, you need SNS.
You don't have to couple SNS and SQS always. You can have SNS send messages to email, sms or http end point apart from SQS. There are adv...
Should one use < or
If you had to iterate through a loop 7 times, would you use:
39 Answers
39
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Using unset vs. setting a variable to empty
...
Mostly you don't see a difference, unless you are using set -u:
/home/user1> var=""
/home/user1> echo $var
/home/user1> set -u
/home/user1> echo $var
/home/user1> unset var
/home/user1> echo $var
-bash: var: unbound variable
S...
How to see what will be updated from repository before issuing “svn update” command?
...ory, without updating your local working copy, here is what you can
do:
if you want to know what has been changed in svn server repository, run
command:
$ svn st -u
if you want to know if the same file has been modified both in your local
working copy and in svn server repository, run comm...
How to send an email with Python?
... following example (reproduced from the Python documentation). Notice that if you follow this approach, the "simple" task is indeed simple, and the more complex tasks (like attaching binary objects or sending plain/HTML multipart messages) are accomplished very rapidly.
# Import smtplib for the act...
uint8_t vs unsigned char
...ll be storing small numbers, rather than a character.
Also it looks nicer if you're using other typedefs such as uint16_t or int32_t.
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What is the difference between graph search and tree search?
What is the difference between graph search and tree search versions regarding DFS, A* searches in artificial intelligence ?
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.NET - Get protocol, host, and port
... in .NET to quickly get the current protocol, host, and port? For example, if I'm on the following URL:
7 Answers
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Copy/duplicate database without using mysqldump
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If you don't want to save the password plaintext in your terminals history, you need to split the command: mysqldump -h [server] -u [user] -p db1 > db1, mysql -h [server] -u [user] -p db2 < db1 Otherwise the password p...