大约有 43,000 项符合查询结果（耗时：0.1842秒） [XML]
What is mattr_accessor in a Rails module?
...with both mattr_accessor (Module accessor) and cattr_accessor (as well as _reader/_writer versions). As Ruby's attr_accessor generates getter/setter methods for instances, cattr/mattr_accessor provide getter/setter methods at the class or module level. Thus:
module Config
mattr_accessor :hostna...
Adding a favicon to a static HTML page
...e HTML file; it's called favicon.ico) as the "tab" icon as it were? I have read up on Wikipedia and looked at a few tutorials and have implemented the following:
...
How to tell if rails is in production?
...
I found it much easier to just restart the rails server and read the second line on the command line:
Running rails s -e production outputs:
=> Booting Puma
=> Rails 4.2.4 application starting in `production` on http://localhost:3000
Had Webrick in the example but some peopl...
Pandas conditional creation of a series/dataframe column
..."Z")&(df['Type']=="B")|(df['Type']=="C"), 'Color'] = "purple"
You can read on Pandas logical operators and conditional selection here:
Logical operators for boolean indexing in Pandas
share
|
i...
How to get a index value from foreach loop in jstl
...op will variable which will hold the index of lop.
It can use for use to read for Zeor base index or 1 one base index.
${loop.count}` it will give 1 starting base index.
${loop.index} it will give 0 base index as normal Index of array start from 0.
For Example :
<c:forEach var="currentI...
How can I load an object into a variable name that I specify from an R data file?
...e an .Rdata file, use an .RDS file:
x <- 5
saveRDS(x, "x.rds")
y <- readRDS("x.rds")
all.equal(x, y)
share
|
improve this answer
|
follow
|
...
How do I pass an extra parameter to the callback function in Javascript .filter() method?
...gt; animal === bestPet);
=> ["DOG", "DOG"]
Here is a link to some more reading:
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions#No_separate_this
share
|
...
No Multiline Lambda in Python: Why not?
...d by adding an extra set of parens, something that exists in many places already, e.g. generator expressions surrounded by other arguments, calling a method on an integer literal (although this need not be the case since a function name can't begin with a digit), and of course single-line lambdas as...
“unrecognized selector sent to instance” error in Objective-C
...
This answer compliments the answer by @Leonard Challis which you should read as well.
share
|
improve this answer
|
follow
|
...
How to configure Ruby on Rails with no database?
....1) there is a '-' between active and record in that command. So it should read: rails new myApp --skip-active-record
– Nic Benders
Nov 13 '13 at 6:17
...