大约有 31,500 项符合查询结果（耗时：0.0662秒） [XML]
Find rows that have the same value on a column in MySQL
...
count(1) works equally well, and is more performant. (Learned that trick from Stack Overflow ;-)
– jpaugh
Jul 18 '16 at 18:32
...
How to sort a collection by date in MongoDB?
...
@SamBrightman That function is just a callback. Whatever you want to do with the query result, you put that logic inside your callback. You can read more on what callbacks are and how they work to learn event based programming.
– Sushant Gupt...
How to remove the first and the last character of a string
...
Here you go
var yourString = "/installers/";
var result = yourString.substring(1, yourString.length-1);
console.log(result);
Or you can use .slice as suggested by Ankit Gupta
var yourString = "/installers/services/";
var result = yourString....
Python dictionary: are keys() and values() always the same order?
...e always a 1-to-1 mapping (assuming the dictionary is not altered between calling the 2 methods).
8 Answers
...
Markdown open a new window link [duplicate]
... common features of HTML. One of its best features is that you can always fallback to the full syntax for HTML. This includes doing things that aren't included in markdown. Personally, I like that markdown is concise and includes very little fluff. It makes it easier to learn the whole set of short...
www-data permissions?
So I have a directory in /var/www (called cake) and I need to allow www-data to write to it, but I also want to write to it (without having to use sudo). I'm afraid to change the permissions to 777 in case some other user on my machine (or a hacker) attempts to modify files in that directory. How do...
Laravel Redirect Back with() Message
...ct::back()->withErrors(['msg', 'The Message']);
and inside your view call this
@if($errors->any())
<h4>{{$errors->first()}}</h4>
@endif
share
|
improve this answer
...
Focus Input Box On Load
...utbox" type="text" autofocus>
However, this might not be supported in all browsers, so we can use javascript.
window.onload = function() {
var input = document.getElementById("myinputbox").focus();
}
2) How to place cursor at the end of the input text?
Here's a non-jQuery solution with so...
Disabled UIButton not faded or grey
...or it. There are two options for you:
First way: If you want to apply for all your buttons in your app, so you can write extension for UIButton like this:
extension UIButton {
open override var isEnabled: Bool{
didSet {
alpha = isEnabled ? 1.0 : 0.5
}
}
}
Se...
How do I load an org.w3c.dom.Document from XML in a string?
...L document in a string and would like a Document object. Google turns up all sorts of garbage. What is the simplest solution? (In Java 1.5)
...