大约有 47,000 项符合查询结果（耗时：0.0461秒） [XML]
How to implement has_many :through relationships with Mongoid and mongodb?
...
151
Mongoid doesn't have has_many :through or an equivalent feature. It would not be so useful wit...
Search for “does-not-contain” on a DataFrame in pandas
...
|
edited Jan 24 '19 at 20:23
cs95
231k6060 gold badges391391 silver badges456456 bronze badges
...
Excel VBA - exit for loop
...
answered Feb 23 '12 at 14:39
DanDan
4,64111 gold badge1414 silver badges2727 bronze badges
...
Converting an integer to a hexadecimal string in Ruby
...
You can give to_s a base other than 10:
10.to_s(16) #=> "a"
Note that in ruby 2.4 FixNum and BigNum were unified in the Integer class.
If you are using an older ruby check the documentation of FixNum#to_s and BigNum#to_s
...
Change Default Scrolling Behavior of UITableView Section Header
...
19 Answers
19
Active
...
What's the difference between array_merge and array + array?
...
|
edited Feb 13 at 18:06
Joe DF
4,54466 gold badges3434 silver badges5353 bronze badges
ans...
.NET Global exception handler in console application
... Enter to continue");
Console.ReadLine();
Environment.Exit(1);
}
}
Do keep in mind that you cannot catch type and file load exceptions generated by the jitter this way. They happen before your Main() method starts running. Catching those requires delaying the jitter, move the...
Append an object to a list in R in amortized constant time, O(1)?
...
17 Answers
17
Active
...
Converting integer to binary in python
...
14 Answers
14
Active
...
Simple calculations for working with lat/lon and km distance?
...
The approximate conversions are:
Latitude: 1 deg = 110.574 km
Longitude: 1 deg = 111.320*cos(latitude) km
This doesn't fully correct for the Earth's polar flattening - for that you'd probably want a more complicated formula using the WGS84 reference ellipsoid (the m...