大约有 46,000 项符合查询结果（耗时：0.0670秒） [XML]
How do I test for an empty JavaScript object?
...
// because Object.keys(new Date()).length === 0;
// we have to do some additional check
Object.keys(obj).length === 0 && obj.constructor === Object
Note, though, that this creates an unnecessary array (the return value of keys).
Pre-ECMA 5:
function isEmpty(obj) {
for(var prop in obj)...
Unsubscribe anonymous method in C#
Is it possible to unsubscribe an anonymous method from an event?
11 Answers
11
...
iPhone: How to get current milliseconds?
...
[[NSDate date] timeIntervalSince1970];
It returns the number of seconds since epoch as a double. I'm almost sure you can access the milliseconds from the fractional part.
share
|
...
How to force use of overflow menu on devices with menu button
I'd like to have all of the menu items that don't fit into the ActionBar go into the overflow menu (the one that is reached from the Action Bar not the menu button) even on devices that do have a Menu button . This seems much more intuitive for users than throwing them into a separate menu list th...
How to pass a URI to an intent?
...to pass a URI-Object to my Intent in order to use that URI
in another activity...
8 Answers
...
is_file or file_exists in PHP
...will return true if the given path points to a valid file or directory. So it would depend entirely on your needs. If you want to know specifically if it's a file or not, use is_file(). Otherwise, use file_exists().
share
...
How to get the list of all printers in computer
...follow
|
edited Aug 22 '14 at 14:56
Arvo Bowen
3,46066 gold badges3636 silver badges7272 bronze badges
...
Input and output numpy arrays to h5py
...is a sized matrix, whose entries are all of the type float . If I save it with the extension .dat the file size is of the order of 500 MB. I read that using h5py reduces the file size considerably. So, let's say I have the 2D numpy array named A . How do I save it to an h5py file?
Also, how...
MySQL Cannot drop index needed in a foreign key constraint
...follow
|
edited May 23 '17 at 12:34
Community♦
111 silver badge
answered Dec 12 '11 at ...
How to get RelativeLayout working with merge and include?
...
There is an issue with the include tag. Check: https://issuetracker.google.com/issues/36908001
To fix it, make sure you overwrite BOTH layout_width and layout_height when including, otherwise everything will be ignored.
...