大约有 48,000 项符合查询结果（耗时：0.0726秒） [XML]
In a Django form, how do I make a field readonly (or disabled) so that it cannot be edited?
... work for a ForeignKey field, a few changes need to be made. Firstly, the SELECT HTML tag does not have the readonly attribute. We need to use disabled="disabled" instead. However, then the browser doesn't send any form data back for that field. So we need to set that field to not be required so...
Mercurial — revert back to old version and continue from there
...
You can also select a specific revision. e.g. hg revert path/to/file -r478
– Matt
Sep 3 '19 at 21:53
add a comme...
prevent property from being serialized in web API
...List<Something> somethings = ...
var returnObjects = somethings.Select(x => new {
Id = x.Id,
OtherField = x.OtherField
});
httpResponseMessage = Request.CreateResponse(HttpStatusCode.OK,
new { result = true, somethings = return...
Pros and Cons of SQLite and Shared Preferences [closed]
...s. Imagine retrieving a specific entry which could be handled by a simple "SELECT ... WHERE id = 1". In Preferences path, this will be a long process from deserializing to iterating the results.
share
|
...
Learning Python from Ruby; Differences and Similarities
...lues greater than 15. In Ruby, you'd have to write the following:
values.select {|v| v > 15}.map {|v| v * v}
The Ruby code doesn't feel as compact. It's also not as efficient since it first converts the values array into a shorter intermediate array containing the values greater than 15. Th...
Why shouldn't all functions be async by default?
...eason to make all methods async if they are not needed to - extensibility. Selective making methods async only works if your code never evolves and you know that method A() is always CPU-bound (you keep it sync) and method B() is always I/O bound (you mark it async).
But what if things change? Yes,...
WebRTC - scalable live stream broadcasting / multicasting
...
You're actually explaining how an SFU (Selective Forwarding Unit) works. You can do the same with mediasoup
– Dirk V
Jun 17 at 13:16
add a ...
What is lazy loading in Hibernate?
...
Bydefault lazy loading is true.Lazy loading means when the select query is executed it will not hit the database. It will wait for getter function i.e when we required then ,it will fetch from the datbase.
for example:
You are a parent who has a kid with a lot of toys. But the curren...
How to 'git pull' into a branch that is not the current one?
...origin/master into master but I cannot run git checkout to change the selected branch until after the pull is complete. Is there a way to do this?
...
How to convert number to words in java
...o use a built-in function of your DBMS (if available).
For Oracle
SQL> select to_char(to_date(873,'J'), 'JSP') as converted_form from dual;
CONVERTED_FORM
---------------------------
EIGHT HUNDRED SEVENTY-THREE
SQL>
'JSP' means :
J : the Julian format.
SP : spells the word for the number pa...