大约有 32,000 项符合查询结果（耗时：0.0508秒） [XML]
Skip download if files exist in wget?
... when you are downloading from a location that was copied, changing all the timestamps.
– Robert
Oct 28 '16 at 16:22
...
How can I check whether an array is null / empty?
....println("array is empty");
}
An alternative definition of "empty" is if all the elements are null:
Object arr[] = new Object[10];
boolean empty = true;
for (int i=0; i<arr.length; i++) {
if (arr[i] != null) {
empty = false;
break;
}
}
or
Object arr[] = new Object[10];
boolean e...
Detect when a window is resized using JavaScript ?
...
You can use .resize() to get every time the width/height actually changes, like this:
$(window).resize(function() {
//resize just happened, pixels changed
});
You can view a working demo here, it takes the new height/width values and updates them in the page for you to see. Remem...
Why does (i
...cts. And while comparing objects, there isn't any need of
auto unboxing.
All the conditions are true, and you are not changing i and j in loop, so it is running infinitely.
share
|
improve this an...
New line in JavaScript alert box
... Why is this answer underrated? if your are thinking way more dynamically in terms of programming webpages this is a big help.
– Jimwel Anobong
Oct 25 '17 at 12:59
...
What is SELF JOIN and when would you use it? [duplicate]
.... Isn't that whole point of doing a self join?
– A. Sallai
Jan 2 '17 at 10:36
1
don't we need AS ...
how to convert binary string to decimal?
... JS practicing could be
var bin2int = s => Array.prototype.reduce.call(s, (p,c) => p*2 + +c)
console.log(bin2int("101010"));
where +c coerces String type c to a Number type value for proper addition.
share
...
Change font size macvim?
I'm using macvim and I love it. I also happen to really like the default font.
7 Answers
...
How to handle Back button with in the dialog?
...
@dmmh if you don't call dialog.dismiss() will get a memory leak.
– CONvid19
Mar 31 '14 at 19:56
2
...
What is the dual table in Oracle?
...of dummy table with a single record used for selecting when you're not actually interested in the data, but instead want the results of some system function in a select statement:
e.g. select sysdate from dual;
See http://www.adp-gmbh.ch/ora/misc/dual.html
...