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Difference between initLoader and restartLoader in LoaderManager
...e "query" to load that data. Let's assume we use a CursorLoader querying a table for orders. If a new order is added to that table the CursorLoader uses onContentChanged() to inform the UI to update and show the new order (no need to use restartLoader in this case). If we want to display only open o...
如何查看Oracle用户的SQL执行历史记录？ - 数据库(内核) - 清泛网 - 专注C/...
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SQL> select username,scn,timestamp,sql_redo from v$logmnr_contents where table_name='TEST2';
SQL> select username,scn,timestamp,sql_redo from v$logmnr_contents where username='P_CHENMING';
--关闭MINER
SQL> execute dbms_logmnr.end_logmnr;
--关闭辅助日志
SQL> alter database drop suppl...
Is there a way to detect if an image is blurry?
...at representing the blurryness of a given image, you have to work out a suitable metric.
nikie's answer provide such a metric. Convolve the image with a Laplacian kernel:
1
1 -4 1
1
And use a robust maximum metric on the output to get a number which you can use for thresholding. Try to a...
Cookie blocked/not saved in IFRAME in Internet Explorer
...d: if the inner page sends a P3P header with a privacy policy that is acceptable to IE, the cookies will be accepted.
How to solve it
Create a p3p policy
A good starting point is the W3C tutorial. I've gone through it, downloaded the IBM Privacy Policy Editor and there I created a representation...
Pip install Matplotlib error with virtualenv
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On my debian (wheezy/unstable) system it was failing even with libfreetype6-dev installed. It turned out that I also needed pkg-config installed.
– Jon
Mar 5 '14 at 20:25
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When should I use UNSIGNED and SIGNED INT in MySQL?
...ned can store negative numbers (i.e., may have a negative sign).
Here's a table of the ranges of values each INTEGER type can store:
Source: http://dev.mysql.com/doc/refman/5.6/en/integer-types.html
UNSIGNED ranges from 0 to n, while signed ranges from about -n/2 to n/2.
In this case, you have ...
Returning multiple objects in an R function [duplicate]
...what you are looking for?
x1 = function(x){
mu = mean(x)
l1 = list(s1=table(x),std=sd(x))
return(list(l1,mu))
}
library(Ecdat)
data(Fair)
x1(Fair$age)
share
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improve this answer
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Real escape string and PDO [duplicate]
...WHERE username = '".$conn->quote($username)."'";, the queries will inevitably fail.
– user1669496
Jun 11 '14 at 18:05
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SQL is null and = null [duplicate]
...showing a variety of conditions and and their effect as per above.
create table t (x int, y int);
insert into t values (null, null), (null, 1), (1, 1);
select 'x = null' as test , x, y from t where x = null
union all
select 'x != null', x, y from t where x != null
union all
select 'not (x = null)'...
Why are #ifndef and #define used in C++ header files?
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@Јοеу: #pragma once is not portable; the common #ifndef idiom is recommended.
– Keith Thompson
Aug 24 '13 at 19:45
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