大约有 32,000 项符合查询结果（耗时：0.0720秒） [XML]
How to “properly” create a custom object in JavaScript?
...members in its prototype to a new constructor function which does nothing, then uses that constructor. Now we can write simply:
function Circle(x, y, r) {
Shape.call(this, x, y);
this.r= r;
}
Circle.prototype= subclassOf(Shape);
instead of the new Shape() wrongness. We now have an accepta...
Simplest way to read json from a URL in java
...
What for? The readLine function will do the loop then, and I have to concatenate the lines instead of the characters, which is more expensive. That wouldn't keep the code as short as it is now. Furthermore, in JSON notation there is no concept of "lines", so why should I re...
Python: Find in list
....index(2) # => 1
If there are duplicates and you want all the indexes then you can use enumerate() instead:
[i for i,x in enumerate([1,2,3,2]) if x==2] # => [1, 3]
share
|
improve this ans...
How to “set a breakpoint in malloc_error_break to debug”
... In the popup that comes up, enter malloc_error_break in the Symbol field, then click Done.
EDIT: openfrog added a screenshot and indicated that he's already tried these steps without success after I posted my answer. With that edit, I'm not sure what to say. I haven't seen that fail to work myself,...
Design Pattern for Undo Engine
...e with all the information to execute the action and roll it back. You can then maintain a list of all the commands that have been executed and you can roll them back one by one.
share
|
improve thi...
How do I copy an object in Java?
...
But then he'd have to change his code to DummyBean two = new DummyBean(one); Right?
– Chris K
May 17 '10 at 17:43
...
How to deal with floating point number precision in JavaScript?
...95 because toPrecision counts the whole number, not just decimals. You can then use toPrecision(4), but if your result is >100 then you're out of luck again, because it'll allow the first three numbers and one decimal, that way shifting the dot, and rendering this more or less unusable. I ended u...
Foreign Key naming scheme
...y points to a candidate key on the second table rather than a primary key, then you'd probably use a third segment to the name to qualify this. It's an unusual situation to be in, and not one you'd typically design in from scratch, so I didn't include this in the response.
– Gr...
Case conventions on element names?
...orm neutral document format, but as an application specific serialisation, then you might as well save yourself some bother and have a 1:1 correspondence between the XML names and the platform specific names. But almost any other object graph format is better than XML for that purpose.
If you are, ...
How to import an excel file in to a MySQL database
... using MySQL Workbench or already logged into mysql from the command line, then you can execute the generated SQL statements from step 3 directly. Otherwise, paste the code into a text file (e.g., import.sql) and execute this command from a Unix shell:
mysql mydatabase < import.sql
Other ways t...