大约有 3,285 项符合查询结果（耗时：0.0229秒） [XML]
How to delete all datastore in Google App Engine?
...
The fastest and efficient way to handle bulk delete on Datastore is by using the new mapper API announced on the latest Google I/O.
If your language of choice is Python, you just have to register your mapper in a mapreduce.yaml ...
How to extract the n-th elements from a list of tuples?
...
Found this as I was searching for which way is fastest to pull the second element of a 2-tuple list. Not what I wanted but ran same test as shown with a 3rd method plus test the zip method
setup = 'elements = [(1,1) for _ in range(100000)];from operator import itemgette...
Selecting last element in JavaScript array [duplicate]
...test case where you call .pop() and .push() consecutively. Seems to be 10x faster than .slice(-1)[0] but still 10x slower than direct access.
– mjois
Jan 5 '16 at 3:37
...
Repeat each row of data.frame the number of times specified in a column
...ge:
library(splitstackshape)
expandRows(df, "freq")
Simple syntax, very fast, works on data.frame or data.table.
Result:
var1 var2
1 a d
2 b e
2.1 b e
3 c f
3.1 c f
3.2 c f
...
Push local Git repo to new remote including all branches and tags
...hes in remote source to a head branch in destination, possibly doing a non-fast-forward push. You still have to push tags separately.
share
|
improve this answer
|
follow
...
Replace duplicate spaces with a single space in T-SQL
...as CHAR(17) and CHAR(18), as these will NEVER be in your input text. Still faster than the looping of the accepted answer.
– richardtallent
Mar 16 '10 at 22:23
7
...
Example use of “continue” statement in Python?
...
I would have chosen Pray / remove r, or Fast / remove s.
– Benjamin Crouzier
Jan 7 '19 at 22:44
add a comment
|
...
Is there a CSS parent selector?
...tors 4 WD was just updated today to exclude the subject indicator from the fast profile, which is to be used by CSS implementations. If this change remains, it means you won't be able to use the subject indicator in stylesheets anymore (unless you use add some sort of polyfill like the one described...
How do I read CSV data into a record array in NumPy?
... I just noticed there are some notes about the design of pandas' fast csv parser at wesmckinney.com/blog/… . The author takes speed and memory requirements pretty seriously. It's also possible to use as_recarray=True to get the result directly as a Python record array rather than a panda...
How to make a JTable non-editable
...nt. But what I understood from the api is that, if I create a table in the fast way (with "new JTable(Vector, Vector)"), then the table will have default editors for all of its columns. So, if I run "table.setDefaultEditor(column, null)", then I will remove the default editor from the column, so the...