大约有 31,840 项符合查询结果（耗时：0.0332秒） [XML]
What is the rationale behind having companion objects in Scala?
...
The companion object basically provides a place where one can put "static-like" methods. Furthermore, a companion object, or companion module, has full access to the class members, including private ones.
Companion objects are great for encapsulating things like factory methods...
How to find serial number of Android device?
...) will return the MDN or MEID of the device depending on which radio the phone uses (GSM or CDMA).
Each device MUST return a unique value here (assuming it's a phone). This should work for any Android device with a sim slot or CDMA radio. You're on your own with that Android powered microwave ;...
How to get a one-dimensional scalar array as a doctrine dql query result?
... answered Dec 20 '12 at 9:45
Lionel GaillardLionel Gaillard
2,84311 gold badge1616 silver badges1919 bronze badges
...
Delete rows from a pandas DataFrame based on a conditional expression involving len(string) giving K
...
When you do len(df['column name']) you are just getting one number, namely the number of rows in the DataFrame (i.e., the length of the column itself). If you want to apply len to each element in the column, use df['column name'].map(len). So try
df[df['column name'].map(len) &...
What are all possible pos tags of NLTK?
... be used. This was helpful for this too, thanks!
– Phonebox
Jul 4 '15 at 10:38
2
@phipsgabler if ...
Why is a 3-way merge advantageous over a 2-way merge?
Wikipedia says a 3-way merge is less error-prone than a 2-way merge, and often times doesn't need user intervention. Why is this the case?
...
Rolling back local and remote git repository by 1 commit
...ll in the same branch. However, since the push is no longer a fast-forward one, yes, you need to force that push.
– VonC
Jul 1 '14 at 9:28
1
...
How to get ASCII value of string in C#
...course, other character encodings—especially UTF-8—are available, too; One should question whether it is ASCII that is actually wanted.
– Tom Blodget
Jan 11 '19 at 17:53
...
How to load an ImageView by URL in Android? [closed]
... AsyncTasks uses a serial executor, meaning each image will load one at a time and not do parallel thread loading.
– Blundell
Apr 28 '13 at 10:27
2
...
Mechanisms for tracking DB schema changes [closed]
...ch the changes are applied and a "down" method in which the changes are undone. A single command brings the database up to date, and can also be used to bring the database to a specific version of the schema. In Rails, migrations are kept in their own directory in the project directory and get check...