大约有 23,000 项符合查询结果（耗时：0.0335秒） [XML]
Run a callback only if an attribute has changed in Rails
...
Rails 5.1+
class Page < ActiveRecord::Base
before_save :do_something, if: :will_save_change_to_status_id?
private
def do_something
# ...
end
end
The commit that changed ActiveRecord::Dirty is here: https://github.com/rails/rails/commit/16ae3db5a5c...
Could not load NIB in bundle
... (use a storyboard):
For some reason it changed from "Main storyboard file base name" to "Main nib file base name" in the plist.
Changing back to "Main storyboard file base name" (UIMainStoryboardFile) solved the issue
shar...
Tool to Unminify / Decompress JavaScript [closed]
...ne only formats the code, it doesn't change variable names, nor uncompress base62 encoding.
edit: in fact it can unpack "packed" scripts (packed with Dean Edward's packer : http://dean.edwards.name/packer/)
share
|...
How can I generate a diff for a single file between two branches in github
...ttps://github.com/owner/repo-name.git
# git@github.com:owner/repo-name.git
BASE_URL="https://github.com/""$(git config --get remote.origin.url | sed 's/.*github\.com[/:]\(.*\).git/\1/')""/compare"
if [[ "$#" -eq 1 ]]; then
if [[ "$1" =~ .*\.\..* ]]; then
# Handle "git hubdiff fromcommit..toco...
Speed up the loop operation in R
... @carbontwelve Ooops, I was wrong :) This are standard plots (from base R).
– Marek
Jul 25 '13 at 14:15
@Grego...
Can modules have properties the same way that objects can?
...
Based on this, I added another answer: stackoverflow.com/a/58526852/2124834
– user2124834
Oct 23 '19 at 15:59
...
Extracting the last n characters from a string in R
...
I'm not aware of anything in base R, but it's straight-forward to make a function to do this using substr and nchar:
x <- "some text in a string"
substrRight <- function(x, n){
substr(x, nchar(x)-n+1, nchar(x))
}
substrRight(x, 6)
[1] "string"...
Using Rails serialize to save hash to database
...pping ids to a number of attempts in my rails app. My migration to the database to accommodate this new column:
3 Answers
...
Is there a JavaScript MVC (micro-)framework? [closed]
...pproach enables you to select only the features you need. As of 2.0, it's based on jQuery.
On progressively enhancing your website, that's left up to the user as JMVC provides just a middle layer for development - it's up to you to make that design choice yourself.
However, JavaScriptMVC is sim...
Creating an API for mobile applications - Authentication and Authorization
...ing into different mechanisms for authentication and authorization for web-based APIs (by studying other implementations). I've got my head wrapped around most of the fundamental concepts but am still looking for guidance in a few areas. The last thing I want to do is reinvent the wheel, but I'm n...