大约有 34,900 项符合查询结果（耗时：0.0514秒） [XML]
How exactly does the python any() function work?
... True.
In the code you posted, x > 0 for x in lst, this is a different kind of iterable, called a generator expression. Before generator expressions were added to Python, you would have created a list comprehension, which looks very similar, but with surrounding []'s: [x > 0 for x in lst]. Fr...
Disabled form inputs do not appear in the request
...L 4 spec:
Disabled controls do not receive focus.
Disabled controls are skipped in tabbing navigation.
Disabled controls cannot be successfully posted.
You can use readonly attribute in your case, by doing this you will be able to post your field's data.
I.e.,
<input type="textbox" name="Pe...
What is the difference between static_cast and C style casting?
...
C++ style casts are checked by the compiler. C style casts aren't and can fail at runtime.
Also, c++ style casts can be searched for easily, whereas it's really hard to search for c style casts.
Another big benefit is that the 4 different C++ sty...
MySQL: Fastest way to count number of rows
...
When you COUNT(*) it takes in count column indexes, so it will be the best result. Mysql with MyISAM engine actually stores row count, it doensn't count all rows each time you try to count all rows. (based on primary key's column)
Using PHP to cou...
JavaScript equivalent of PHP's in_array()
.... For this reason most popular libraries come with one in their utility packages. Check out jQuery's inArray and Prototype's Array.indexOf for examples.
jQuery's implementation of it is as simple as you might expect:
function inArray(needle, haystack) {
var length = haystack.length;
for(v...
How can I parse a JSON file with PHP? [duplicate]
I tried to parse a JSON file using PHP. But I am stuck now.
16 Answers
16
...
how to remove shared preference while application uninstall in android
...in details such as user name and password via SharedPreferences thats works fine, but i need to remove all my used SharedPreferences while my application uninstall. How to do it?
...
How do I truncate a .NET string?
I would like to truncate a string such that its length is not longer than a given value. I am writing to a database table and want to ensure that the values I write meet the constraint of the column's datatype.
...
Unauthorised webapi call returning login page rather than 401
...
There are two AuthorizeAttribute implementations and you need to make sure you are referencing the correct one for Web API's. There is System.Web.Http.AuthorizeAttribute which is used for Web API's, and System.Web.Mvc.AuthorizeAttribute which is used for controllers with views. Http.Author...
How do I convert a String to an int in Java?
...String myString = "1234";
int foo = Integer.parseInt(myString);
If you look at the Java documentation you'll notice the "catch" is that this function can throw a NumberFormatException, which of course you have to handle:
int foo;
try {
foo = Integer.parseInt(myString);
}
catch (NumberFormatExcep...