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How to check permissions of a specific directory?
...
There is also
getfacl /directory/directory/
which includes ACL
A good introduction on Linux ACL here
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C++ stl stack/queue 的使用方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...，返回true。
访问队列中的元素个数，如例：q.size()
#include <cstdlib>
#include <iostream>
#include <queue>
using namespace std;
int main()
{
int e,n,m;
queue<int> q1;
for(int i=0;i<10;i++)
q1.push(i);
if(!q1.empty())
cout<<"dui lie bu k...
Rails - How to use a Helper Inside a Controller
...sser's answer is the way to go.
Option 1: Probably the simplest way is to include your helper module in your controller:
class MyController < ApplicationController
include MyHelper
def xxxx
@comments = []
Comment.find_each do |comment|
@comments << {:id => comment.id...
How to re-raise an exception in nested try/except blocks?
... raise e # or raise e from None - see below
The traceback produced will include an additional notice that SomeError occurred while handling AlsoFailsError (because of raise e being inside except AlsoFailsError). This is misleading because what actually happened is the other way around - we encoun...
Setting an int to Infinity in C++
... finite. The closest you can get is by setting a to int's maximum value:
#include <limits>
// ...
int a = std::numeric_limits<int>::max();
Which would be 2^31 - 1 (or 2 147 483 647) if int is 32 bits wide on your implementation.
If you really need infinity, use a floating point num...
Change MySQL default character set to UTF-8 in my.cnf?
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Why do we need to install gulp globally and locally?
...ool globally it's to be used by a user as a command line utility anywhere, including outside of node projects. Global installs for a node project are bad because they make deployment more difficult.
npm 5.2+
The npx utility bundled with npm 5.2 solves this problem. With it you can invoke locally i...
How to delete all records from table in sqlite with Android?
... db.execSQL("delete * from " + TABLE_NAME);
Also there is no need to even include *, the correct query is:
db.execSQL("delete from "+ TABLE_NAME);
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Include constant in string without concatenating
Is there a way in PHP to include a constant in a string without concatenating?
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