大约有 41,000 项符合查询结果（耗时：0.0485秒） [XML]
How to find the length of a string in R
... min lq median uq max neval
nchar(x) 11.868 12.776 13.1590 13.6475 41.815 100
str_length(x) 30.715 33.159 33.6825 34.1360 173.400 100
stri_length(x) 2.653 3.281 4.0495 4.5380 19.966 100
and also works fine with NA's
nchar(NA)
## [1] 2
stri_length(NA)
## [1] ...
Excluding directories in os.walk
... |
edited Sep 7 at 13:13
FLASH3G
333 bronze badges
answered Nov 8 '13 at 13:10
...
Vim: How do you open another [No Name] buffer like the one on startup?
...
answered Dec 18 '10 at 13:18
Randy MorrisRandy Morris
35.9k55 gold badges6262 silver badges7373 bronze badges
...
Convert Object to JSON string
...
13
For those interested, here's a nice chart of native JSON support in different browsers.
– Molomby
Se...
How to do a batch insert in MySQL
...
Jakub Matczak
13.7k55 gold badges4141 silver badges5454 bronze badges
answered Apr 3 '11 at 1:18
nietakinietaki
...
mongodb find by multiple array items
...tikey-indexes
– Vivek Bajpai
Apr 1 '13 at 12:49
1
...
How to write an XPath query to match two attributes?
...
|
edited Aug 7 '13 at 8:16
zhangyangyu
7,79222 gold badges2828 silver badges4242 bronze badges
...
How to find the installed pandas version
...commit: None
python: 2.7.6.final.0
python-bits: 64
OS: Linux
OS-release: 3.13.0-45-generic
machine: x86_64
processor: x86_64
byteorder: little
LC_ALL: None
LANG: en_US.UTF-8
pandas: 0.15.2-113-g5531341
nose: 1.3.1
Cython: 0.21.1
numpy: 1.8.2
scipy: 0.14.0.dev-371b4ff
statsmodels: 0.6.0.dev-a738b4f
...
How can I add items to an empty set in python
...
|
edited Jul 7 '13 at 10:28
answered Jul 7 '13 at 10:23
...
Convert integer to string Jinja
... |
edited Apr 3 '15 at 13:58
Ajoy
1,81433 gold badges2727 silver badges5353 bronze badges
answered Oc...