大约有 36,010 项符合查询结果（耗时：0.0425秒） [XML]
How to trim whitespace from a Bash variable?
... the sed approach will only work on single-line input. For approaches that do work with multi-line input and also use bash's built-in features, see the answers by @bashfu and @GuruM. A generalized, inline version of @Nicholas Sushkin's solution would look like this: trimmed=$([[ " test test test "...
How to select where ID in Array Rails ActiveRecord without exception
...ns.
Comment.find_all_by_id([2, 3, 5])
will work even if some of the ids don't exist. This works in the
user.comments.find_all_by_id(potentially_nonexistent_ids)
case as well.
Update: Rails 4
Comment.where(id: [2, 3, 5])
...
How/when to use ng-click to call a route?
...ash). To "activate" a route, you simply change the URL. The easiest way to do that is with anchor tags.
<a href="#/home">Go Home</a>
<a href="#/about">Go to About</a>
Nothing more complicated is needed. If, however, you must do this from code, the proper way is by using th...
Delete directories recursively in Java
... should check out Apache's commons-io. It has a FileUtils class that will do what you want.
FileUtils.deleteDirectory(new File("directory"));
share
|
improve this answer
|
...
How to use JavaScript regex over multiple lines?
...d up, even though it spans over newline characters. I thought the 'm' flag does it. Does not.
6 Answers
...
How to check if object property exists with a variable holding the property name?
...Obj){
alert("yes, i have that property");
}
Note that hasOwnProperty doesn't check for inherited properties, whereas in does. For example 'constructor' in myObj is true, but myObj.hasOwnProperty('constructor') is not.
...
How to make a edittext box in a dialog
...make a edittext box in a dialog box for entering a password.
and when I am doing I am not able to do. I am a beginner in it.
Please help me in this.
...
How to ALTER multiple columns at once in SQL Server
...
This is not possible. You will need to do this one by one.
You could:
Create a Temporary Table with your modified columns in
Copy the data across
Drop your original table (Double check before!)
Rename your Temporary Table to your original name
...
R programming: How do I get Euler's number?
...
Please do not edit the question to change its terminology. The fact that 25000 people have visited this page without complaint until now suggests to me that many people read "Euler's constant" to mean e, and if you change the title,...
How do I escape characters in c# comments?
I realized today that I don't know how to escape characters in comments for C#. I want to document a generic C# class, but I can not write a proper example since I don't know how to escape the < and > characters. Do I have to use &lt; and &gt; ? I don't like if that is the case ...