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How to find Unused Amazon EC2 Security groups
...
If you select all of your security groups in the EC2 console, then press actions -> Delete Security Groups, a popup will appear telling you that you cannot delete security groups that are attached to instances, other security gro...
How do I set a variable to the output of a command in Bash?
...-expanded before being passed to the echo command.
– Charles Duffy
Apr 21 '15 at 15:37
4
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Is there a performance difference between i++ and ++i in C++?
...ata() { return myData; }
private:
int myData;
};
int main(int argc, char* argv[])
{
Foo testFoo;
int count;
printf("Enter loop count: ");
scanf("%d", &count);
for(int i=0; i<count; i++)
{
testFoo++;
}
printf("Value: %d\n", testFoo.GetData());
...
How do I connect to a MySQL Database in Python?
...ueries you need
cur = db.cursor()
# Use all the SQL you like
cur.execute("SELECT * FROM YOUR_TABLE_NAME")
# print all the first cell of all the rows
for row in cur.fetchall():
print row[0]
db.close()
Of course, there are thousand of possibilities and options; this is a very basic example. Y...
Is there a difference between copy initialization and direct initialization?
...ain function :
int main()
{
A a1 = 1; // OK: copy-initialization selects A::A(int)
A a2(2); // OK: direct-initialization selects A::A(int)
A a3 {4, 5}; // OK: direct-list-initialization selects A::A(int, int)
A a4 = {4, 5}; // OK: copy-list-initialization selects A::A(i...
How to find a table having a specific column in postgresql
...
you can query system catalogs:
select c.relname
from pg_class as c
inner join pg_attribute as a on a.attrelid = c.oid
where a.attname = <column name> and c.relkind = 'r'
sql fiddle demo
...
Can multiple different HTML elements have the same ID if they're different elements?
...into problems being able to work with these elements from JS, pass them as selectors to libraries/APIs/Flash, etc.
– mrooney
May 13 '13 at 20:55
...
“ClickOnce does not support the request execution level 'requireAdministrator.'”
...shing wizard, or 'Publish Now', the click-once checkbox gets automatically selected...
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How do I convert an enum to a list in C#? [duplicate]
...er way:
Enum.GetValues(typeof(SomeEnum))
.Cast<SomeEnum>()
.Select(v => v.ToString())
.ToList();
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Guaranteed lifetime of temporary in C++?
... {
if (m_buffer.size() != 0)
{
size_t l = std::char_traits<C>::length(get());
m_str.assign(get(), l);
m_buffer.resize(0);
}
}
void abort()
{ m_buffer.resize(0); }
};
template <class C>
inline _StringBuffer&...