大约有 42,000 项符合查询结果（耗时：0.0810秒） [XML]
Fast way of finding lines in one file that are not in another?
...ile1 file2
The input files should be sorted for this to work. With bash (and zsh) you can sort in-place with process substitution <( ):
diff --new-line-format="" --unchanged-line-format="" <(sort file1) <(sort file2)
In the above new and unchanged lines are suppressed, so only changed...
ActiveRecord: List columns in table from console
...rmation for a table through ActiveRecord. Crucially for me it was the only and easiest way to gain confidence in what my primary key really was at the database level.
– nibbex
Mar 11 '15 at 17:30
...
How to convert a table to a data frame
...trix(mytable) will reveal that tables really are just dressed up matrices, and as.data.frame.matrix is the method that gets dispatched when as.data.frame() is passed a matrix argument.)
– Josh O'Brien
May 25 '12 at 17:59
...
how to return index of a sorted list? [duplicate]
I need to sort a list and then return a list with the index of the sorted items in the list. For example, if the list I want to sort is [2,3,1,4,5] , I need [2,0,1,3,4] to be returned.
...
When should I use Write-Error vs. Throw? Terminating vs. non-terminating errors
...It does not stop a pipeline or a loop from continuing. Throw on the other hand produces what is called a terminating error. If you use throw, the pipeline and/or current loop will be terminated. In fact all execution will be terminated unless you use a trap or a try/catch structure to handle the ter...
Is git not case sensitive?
... collapsing the commits. A shorter way to do it is to manipulate the index and working folder all in one:
git mv file.txt temp.txt
git mv temp.txt File.txt
git commit -m "Renamed file.txt to File.txt"
This is related to adjusting directory names as well: git mv and only change case of directory
...
How to add number of days to today's date? [duplicate]
...{
this.setDate(this.getDate() + parseInt(days));
return this;
};
and in your javascript code you could call
var currentDate = new Date();
// to add 4 days to current date
currentDate.addDays(4);
share
|
...
How do I detect when someone shakes an iPhone?
...btype == UIEventSubtypeMotionShake )
{
// Put in code here to handle shake
}
if ( [super respondsToSelector:@selector(motionEnded:withEvent:)] )
[super motionEnded:motion withEvent:event];
}
- (BOOL)canBecomeFirstResponder
{ return YES; }
@end
You can easily transfor...
How can I fill out a Python string with spaces?
...
@simon 's answer is more flexible and more useful when formatting more complex strings
– CoatedMoose
Jul 27 '13 at 7:08
4
...
Escape quotes in JavaScript
...nary Assessment \"Mini\"'); return false;">edit</a> I tried that, and it is still screwing up. This has got to be a simple WTF but for the life of me, I can't see it.
– Matt Dawdy
Jan 5 '10 at 4:35
...