大约有 43,100 项符合查询结果（耗时：0.0304秒） [XML]
How to get first character of a string in SQL?
...
LEFT(colName, 1) will also do this, also. It's equivalent to SUBSTRING(colName, 1, 1).
I like LEFT, since I find it a bit cleaner, but really, there's no difference either way.
...
SQL: capitalize first letter only [duplicate]
...
190
Are you asking for renaming column itself or capitalise the data inside column? If its data yo...
Rotating a two-dimensional array in Python
...
Consider the following two-dimensional list:
original = [[1, 2],
[3, 4]]
Lets break it down step by step:
>>> original[::-1] # elements of original are reversed
[[3, 4], [1, 2]]
This list is passed into zip() using argument unpacking, so the zip call ends...
Convert a row of a data frame to vector
...
156
When you extract a single row from a data frame you get a one-row data frame. Convert it to a...
How do I use floating-point division in bash?
...
18 Answers
18
Active
...
Differences between Oracle JDK and OpenJDK
...
11 Answers
11
Active
...
Decreasing for loops in Python impossible?
...
for n in range(6,0,-1):
print n
# prints [6, 5, 4, 3, 2, 1]
share
|
improve this answer
|
follow
|
...
Creating dataframe from a dictionary where entries have different lengths
Say I have a dictionary with 10 key-value pairs. Each entry holds a numpy array. However, the length of the array is not the same for all of them.
...
How to profile a bash shell script slow startup?
...
132
If you have GNU date (or another version that can output nanoseconds), do this at the beginnin...
Current time formatting with Javascript
...
14 Answers
14
Active
...