大约有 30,000 项符合查询结果（耗时：0.0463秒） [XML]
Best data type for storing currency values in a MySQL database
...ecimal(19,4) both use 9 bytes of storage, so might as well spring for that extra 9 digits of scale.
– Adam Nofsinger
Mar 24 '10 at 14:50
1
...
Why do I get a “Null value was assigned to a property of primitive type setter of” error message whe
...you had a relational table (STUDENT) with two columns and ID(int) and NAME(String). Now as ORM you would've made an entity class somewhat like as follows:-
package com.kashyap.default;
import java.io.Serializable;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.pers...
How do I loop through a date range?
...me> step = null)
{
return from.RangeTo(to, step);
}
}
Extras
You could throw an Exception if the fromDate > toDate, but I prefer to return an empty range instead []
share
|
...
How to set up a PostgreSQL database in Django
...org/psycopg/, then install it under Python PATH
After downloading, easily extract the tarball and:
$ python setup.py install
Or if you wish, install it by either easy_install or pip.
(I prefer to use pip over easy_install for no reason.)
$ easy_install psycopg2
$ pip install psycopg2
Config...
View markdown files offline [closed]
... thanks, a Chrome extension would always be useful; no need to use extra software
– Avi
Sep 26 '13 at 1:55
39
...
How to resume Fragment from BackStack if exists
...nt replacement logic.
private void replaceFragment (Fragment fragment){
String backStateName = fragment.getClass().getName();
FragmentManager manager = getSupportFragmentManager();
boolean fragmentPopped = manager.popBackStackImmediate (backStateName, 0);
if (!fragmentPopped){ //fragment ...
What is the purpose of Rank2Types?
...y only use it as monomorphic. In the example map uses id as if it had type String -> String. And of course you can also pass a simple monomorphic function of the given type instead of id. Without rank2types there is no way for a function to require that its argument must be a polymorphic function...
Is DateTime.Now the best way to measure a function's performance?
...rformance counter doesn't exist) Stopwatch is using DateTime.UtcNow + some extra processing. Because of that it's obvious that in that case DateTime.UtcNow is the best option (because other use it + some processing)
However, as it turns out, the counter almost always exists - see Explanation about ...
ASP.NET MVC partial views: input name prefixes
... helper class by this :
using System.Web.Mvc.Html
public static MvcHtmlString PartialFor<TModel, TProperty>(this HtmlHelper<TModel> helper, System.Linq.Expressions.Expression<Func<TModel, TProperty>> expression, string partialViewName)
{
string name = Expressi...
Sublime Text 2 - Show file navigation in sidebar
...on panel for openned files and project folders appear in the left of ST ?
Extra : Want view the other files that are in the same directory with someFileName.py ?
While I found ST side bar seems doesn't support this, but you can try Ctrl + O (Open) keyshort in ST to open your system file browser, in...