大约有 10,900 项符合查询结果（耗时：0.0400秒） [XML]
Python: Convert timedelta to int in a dataframe
...days attribute. Access this attribute via:
timedelta_series.dt.days
You can also get the seconds and microseconds attributes in the same way.
share
|
improve this answer
|
...
How can I create an array with key value pairs?
How can I add key value pairs to an array?
6 Answers
6
...
Regular expression to return text between parenthesis
...>>> import re
>>> s = u'abcde(date=\'2/xc2/xb2\',time=\'/case/test.png\')'
>>> re.search(r'\((.*?)\)',s).group(1)
u"date='2/xc2/xb2',time='/case/test.png'"
share
|
improv...
What do you call the -> operator in Ruby?
...("Methods, Procs, Lambdas, and Closures"), a lambda defined using -> is called lambda literal.
succ = ->(x){ x+1 }
succ.call(2)
The code is equivalent to the following one.
succ = lambda { |x| x + 1 }
succ.call(2)
Informally, I have heard it being called stabby lambda or stabby literal...
Show hidden div on ng-click within ng-repeat
I'm working on an Angular.js app that filters through a json file of medical procedures. I'd like to show the details of each procedure when the name of the procedure is clicked (on the same page) using ng-click. This is what I have so far, with the .procedure-details div set to display:none:
...
Specifying colClasses in the read.csv
...n the read.csv function in R. In my data, the first column "time" is basically a character vector while the rest of the columns are numeric.
...
How can I determine if a String is non-null and not only whitespace in Groovy?
... @Steven, Groovy truth says that a null or empty string is false, so you can just wrap it in () as well if you need it in a statement that wouldn't already make it a boolean. For example, def myVal = (myString?.trim())
– cdeszaq
Feb 7 '12 at 13:11
...
What does iterator->second mean?
...ough two members: first and second. So if you have a std::pair<X, Y> called p, p.first is an X object and p.second is a Y object.
So now you know that dereferencing a std::map iterator gives you a std::pair, you can then access its elements with first and second. For example, (*it).first will...
How to define @Value as optional
...by 'not required' you mean null then...
You have correctly noted that you can supply a default value to the right of a : character. Your example was @Value("${myValue:DEFAULT}").
You are not limited to plain strings as default values. You can use SPEL expressions, and a simple SPEL expression to ...
.NET Process.Start default directory?
I'm firing off a Java application from inside of a C# .NET console application. It works fine for the case where the Java application doesn't care what the "default" directory is, but fails for a Java application that only searches the current directory for support files.
...