大约有 16,000 项符合查询结果（耗时：0.0295秒） [XML]
How do I check the difference, in seconds, between two dates?
There has to be an easier way to do this. I have objects that want to be refreshed every so often, so I want to record when they were created, check against the current timestamp, and refresh as necessary.
...
How to define “type disjunction” (union types)?
One way that has been suggested to deal with double definitions of overloaded methods is to replace overloading with pattern matching:
...
How to comment lines in rails html.erb files? [duplicate]
Am a newbie to rails ,
please let me know the way to comment out a single line and also to comment out
a block of lines in *.html.erb files.
...
Plot a legend outside of the plotting area in base graphics?
... title says: How can I plot a legend outside the plotting area when using base graphics?
10 Answers
...
Add a prefix string to beginning of each line
...efix/' file
# If you want to create a new file
sed -e 's/^/prefix/' file > file.new
If prefix contains /, you can use any other character not in prefix, or
escape the /, so the sed command becomes
's#^#/opt/workdir#'
# or
's/^/\/opt\/workdir/'
...
Transaction isolation levels relation with locks on table
I have read about 4 levels of isolation:
3 Answers
3
...
Easiest way to compare arrays in C#
In Java, Arrays.equals() allows to easily compare the content of two basic arrays (overloads are available for all the basic types).
...
Hiding the scroll bar on an HTML page
...
Set overflow: hidden; on the body tag like this:
<style type="text/css">
body {
overflow: hidden;
}
</style>
The code above hides both the horizontal and vertical scrollbar.
If you want to hide only the vertical scrollbar, use ov...
Extract value of attribute node via XPath
...
//Parent[@id='1']/Children/child/@name
Your original child[@name] means an element child which has an attribute name. You want child/@name.
share
|
improve this answer
...
Is it possible to use the instanceof operator in a switch statement?
I have a question of using switch case for instanceof object:
24 Answers
24
...