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Many-to-many relationship with the same model in rails?
...connection.save!
=> true
Instead of creating the association and then setting the category separately, you can also just create a PostConnection and be done with it:
>> b.posts = []
=> []
>> PostConnection.create(
?> :post_a => b, :post_b => a,
?> :category =>...
Jquery mouseenter() vs mouseover()
So after reading a recently answered question i am unclear if i really understand the difference between the mouseenter() and mouseover() . The post states
...
Format SQL in SQL Server Management Studio
...s, OUTPUT clauses, and other finicky stuff.
The SSMS Add-in allows you to set your own hotkey (default is Ctrl-K, Ctrl-F, to match Visual Studio), and formats the entire script or just the code you have selected/highlighted, if any. Output formatting is customizable.
In SSMS 2008 it combines nicel...
Iterator invalidation rules
... and references unaffected [23.2.2.3/1]
Associative containers
[multi]{set,map}: all iterators and references unaffected [23.1.2/8]
Container adaptors
stack: inherited from underlying container
queue: inherited from underlying container
priority_queue: inherited from underlying container
...
PHP: How to use array_filter() to filter array keys?
...PHP 5.6 introduced a third parameter to array_filter(), flag, that you can set to ARRAY_FILTER_USE_KEY to filter by key instead of value:
$my_array = ['foo' => 1, 'hello' => 'world'];
$allowed = ['foo', 'bar'];
$filtered = array_filter(
$my_array,
function ($key) use ($allowed) {
...
Check if Python Package is installed
What's a good way to check if a package is installed while within a Python script? I know it's easy from the interpreter, but I need to do it within a script.
...
App Inventor 2 接入百度网盘API · App Inventor 2 中文网
...框】
3、获取文件列表，返回JSON，拿出想要的文件的fsid 【使用Web客户端】
4、获取文件信息，返回JSON，根据fsid取出dlink 【使用Web客户端】
5、根据dlink下载 【Web客户端】
6、下载效果展示
App Inventor 2 接...
Can git ignore a specific line?
...on" of "Git Attributes"):
*.yourType filter=yourFilterName
(you can even set that filter for a specific file, if you want)
Implement:
yourFilterName.smudge (triggered on git checkout) and
git config --global filter.yourFilterName.smudge 'sed "s/isPhoneGap = .*/isPhoneGap = true/"'
yourFilterN...
Collect successive pairs from a stream
Given a stream such as { 0, 1, 2, 3, 4 } ,
20 Answers
20
...
What is the equivalent of MATLAB's repmat in NumPy
I would like to execute the equivalent of the following MATLAB code using NumPy: repmat([1; 1], [1 1 1]) . How would I accomplish this?
...