大约有 48,000 项符合查询结果（耗时：0.0660秒） [XML]
Computational complexity of Fibonacci Sequence
...
|
edited Jan 30 '19 at 8:48
community wiki
...
Run command on the Ansible host
...ou want to run an entire play on the Ansible host, then specify hosts: 127.0.0.1 and connection:local in the play, for example:
- name: a play that runs entirely on the ansible host
hosts: 127.0.0.1
connection: local
tasks:
- name: check out a git repository
git: repo=git://foosball.exa...
What is the difference between NULL, '\0' and 0?
...ear to be differences between various values of zero -- NULL , NUL and 0 .
11 Answers
...
What regex will match every character except comma ',' or semi-colon ';'?
...
answered Sep 11 '09 at 5:41
Mehrdad AfshariMehrdad Afshari
379k8383 gold badges822822 silver badges775775 bronze badges
...
Python Dictionary Comprehension
... like.
>>> d = {n: n**2 for n in range(5)}
>>> print d
{0: 0, 1: 1, 2: 4, 3: 9, 4: 16}
If you want to set them all to True:
>>> d = {n: True for n in range(5)}
>>> print d
{0: True, 1: True, 2: True, 3: True, 4: True}
What you seem to be asking for is a way ...
Return 0 if field is null in MySQL
...
Use IFNULL:
IFNULL(expr1, 0)
From the documentation:
If expr1 is not NULL, IFNULL() returns expr1; otherwise it returns expr2. IFNULL() returns a numeric or string value, depending on the context in which it is used.
...
Should I use a data.frame or a matrix?
...
|
edited Aug 30 '17 at 0:12
answered Mar 1 '11 at 19:00
...
Code for decoding/encoding a modified base64 URL
...
|
edited Aug 4 '09 at 21:36
answered Aug 4 '09 at 17:06
...
Hex representation of a color with alpha channel?
...se rgba() functional notation with decimals or percentages, e.g. rgba(255, 0, 0, 0.5) would be 50% transparent red. RGB channels are 0-255 or 0%-100%, alpha is 0-1.
In CSS 4*, you can specify the alpha channel using the 7th and 8th characters of an 8 digit hex colour, or 4th character of a 4 digit ...
How to determine function name from inside a function
...
You can use ${FUNCNAME[0]} in bash to get the function name.
share
|
improve this answer
|
follow
|
...