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Setting an environment variable before a command in Bash is not working for the second command in a
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FOO=bar bash -c 'somecommand someargs | somecommand2'
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How to resolve “local edit, incoming delete upon update” message
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Short version:
$ svn st
! + C foo
> local edit, incoming delete upon update
! + C bar
> local edit, incoming delete upon update
$ touch foo bar
$ svn revert foo bar
$ rm foo bar
If the conflict is about directories instead of fil...
Remove local git tags that are no longer on the remote repository
We use tags in git as part of our deployment process. From time to time, we want to clean up these tags by removing them from our remote repository.
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Arrow operator (->) usage in C
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foo->bar is equivalent to (*foo).bar, i.e. it gets the member called bar from the struct that foo points to.
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How can I select multiple columns from a subquery (in SQL Server) that should have one record (selec
...rom a subquery:
SELECT
A.SalesOrderID,
A.OrderDate,
SQ.Max_Foo,
SQ.Max_Foo2
FROM
A
LEFT OUTER JOIN
(
SELECT
B.SalesOrderID,
MAX(B.Foo) AS Max_Foo,
MAX(B.Foo2) AS Max_Foo2
FROM
B
GROUP BY
B.SalesOrderID
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Are the decimal places in a CSS width respected?
Something I've been wondering for a while whilst doing CSS design.
6 Answers
6
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What is the difference between the dot (.) operator and -> in C++? [duplicate]
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foo->bar() is the same as (*foo).bar().
The parenthesizes above are necessary because of the binding strength of the * and . operators.
*foo.bar() wouldn't work because Dot (.) operator is evaluated first (see operator...
What is the difference between assert, expect and should in Chai?
...upport custom messages just about everywhere. For instance:
assert.isTrue(foo, "foo should be true");
expect(foo, "foo should be true").to.be.true;
The message "foo should be true" will be output together with the failed assertion if the assertion fails. You don't get the opportunity to set a cus...
std::unique_ptr with an incomplete type won't compile
...If you use pimpl with unique_ptr, you need to declare a destructor:
class foo
{
class impl;
std::unique_ptr<impl> impl_;
public:
foo(); // You may need a def. constructor to be defined elsewhere
~foo(); // Implement (with {}, or with = default;) where impl is complete
};
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scoped_ptr 与 auto_ptr 与 shared_ptr 区别总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...lude <memory>
#include <iostream>
using std::tr1::shared_ptr;
class Foo
{
public:
Foo()
{
std::cout<<"new Foo()"<<std::endl;
i = 0;
}
~Foo()
{
std::cout<<"destroy Foo()"<<std::endl;
}
void print()
{
std::cout<<"Foo::print"<<std::endl;
}
int i;
};
void...