大约有 4,769 项符合查询结果（耗时：0.0250秒） [XML]
Simple explanation of MapReduce?
Related to my CouchDB question.
8 Answers
8
...
MySQL convert date string to Unix timestamp
...imestamp:
SELECT UNIX_TIMESTAMP(STR_TO_DATE('Apr 15 2012 12:00AM', '%M %d %Y %h:%i%p'))
Here's an example of how to change date format:
SELECT FROM_UNIXTIME(UNIX_TIMESTAMP(STR_TO_DATE('Apr 15 2012 12:00AM', '%M %d %Y %h:%i%p')),'%m-%d-%Y %h:%i:%p')
Documentation: UNIX_TIMESTAMP, FROM_UNIXTIME
...
Get position of UIView in respect to its superview's superview
...
You can use this:
Objective-C
CGRect frame = [firstView convertRect:buttons.frame fromView:secondView];
Swift
let frame = firstView.convert(buttons.frame, from:secondView)
Documentation reference:
https://develope...
Difference between 3NF and BCNF in simple terms (must be able to explain to an 8-year old)
I have read the quote :
data depends on the key [1NF], the whole key [2NF] and nothing but the key [3NF] .
6 Answers
...
Convert DataFrame column type from string to datetime, dd/mm/yyyy format
How can I convert a DataFrame column of strings (in dd/mm/yyyy format) to datetimes?
4 Answers
...
IOS: verify if a point is inside a rect
Is there a way to verify if a CGPoint is inside a specific CGRect .
8 Answers
8
...
How to remove all whitespace from a string?
So " xx yy 11 22 33 " will become "xxyy112233" . How can I achieve this?
9 Answers
...
Element-wise addition of 2 lists?
... 10 '13 at 7:50
Ashwini ChaudharyAshwini Chaudhary
206k4545 gold badges390390 silver badges441441 bronze badges
...
Debugging Scala code with simple-build-tool (sbt) and IntelliJ
What's the easiest way to debug Scala code managed by sbt using IntelliJ's built-in debugger? The documentation from "RunningSbt" from sbt's google code site lists commands for running the main class for a project or the tests, but there seem to be no commands for debugging.
...
How to count instances of character in SQL Column
I have an sql column that is a string of 100 'Y' or 'N' characters. For example:
16 Answers
...