大约有 40,000 项符合查询结果（耗时：0.0442秒） [XML]
What's the use of session.flush() in Hibernate
...nchronized with what is in the database.
More on the Hibernate website:
http://docs.jboss.org/hibernate/core/3.3/reference/en/html/objectstate.html#objectstate-flushing
flush() is useful, because there are absolutely no guarantees about when the Session executes the JDBC calls, only the order i...
Is it fine to have foreign key as primary key?
... which the foreign key refers will always be valid (or null, if allowed).
http://www.aisintl.com/case/primary_and_foreign_key.html
share
|
improve this answer
|
follow
...
Can Flask have optional URL parameters?
...;userId>/<username>')
def show(userId, username=None):
pass
https://flask.palletsprojects.com/en/1.1.x/quickstart/#unique-urls-redirection-behavior
share
|
improve this answer
...
Read user input inside a loop
...rom the controlling terminal device:
read input </dev/tty
more info: http://compgroups.net/comp.unix.shell/Fixing-stdin-inside-a-redirected-loop
share
|
improve this answer
|
...
How can I detect if a file is binary (non-text) in python?
... if the file does not exist or cannot be accessed.
@attention: found @ http://bytes.com/topic/python/answers/21222-determine-file-type-binary-text on 6/08/2010
@author: Trent Mick <TrentM@ActiveState.com>
@author: Jorge Orpinel <jorge@orpinel.com>"""
fin = open(filename, ...
Set keyboard caret position in html textbox
...er is broken, this one should work (all credits go to blog.vishalon.net):
http://snipplr.com/view/5144/getset-cursor-in-html-textarea/
In case the code gets lost again, here are the two main functions:
function doGetCaretPosition(ctrl)
{
var CaretPos = 0;
if (ctrl.selectionStart || ctrl.select...
Best way to create an empty map in Java
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
What is Node.js? [closed]
...s is EVENT BASED and ASYNCHRONOUS / NON-BLOCKING. Events, like an incoming HTTP connection will fire off a JavaScript function that does a little bit of work and kicks off other asynchronous tasks like connecting to a database or pulling content from another server. Once these tasks have been kicked...
How to upgrade PostgreSQL from version 9.6 to version 10.1 without losing data?
... new file called /etc/apt/sources.list.d/pgdg.list and add below line
deb http://apt.postgresql.org/pub/repos/apt/ utopic-pgdg main
Follow below commands
wget -q -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
sudo apt-get update
sudo apt-get install postgresql-9.4
s...
Drawing Isometric game worlds
...at-s
int x;
int y;
} ASIntCell;
// Cell-math helper here:
// http://gamedevelopment.tutsplus.com/tutorials/creating-isometric-worlds-a-primer-for-game-developers--gamedev-6511
// Although we had to rotate the coordinates because...
// X increases NE (not SE)
// Y increases SE (not SW)
...