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ActiveRecord, has_many :through, and Polymorphic Associations
... Still works as of Rails 4.2.0. However, is there any way to accomplish this these days without source_type and two separate associations?
– Emeka
Feb 27 '16 at 15:27
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How to delete a word and go into insert mode in Vim?
..." by typing "ciw" to delete a word your cursor is on.
The "inner" and "a" commands are great in Vim, also try "ci{" inside a {} block, or "ca{" if you also wish to remove the {} characters too. To translate these commands to English to remember them better, try: "change inner { block" and "change ...
Column order manipulation using col-lg-push and col-lg-pull in Twitter Bootstrap 3
...ange the order of the columns in your HTML markup (in the example below, B comes before A), and that it only does the pushing or pulling on view-ports that are greater than or equal to what was specified. i.e. col-sm-push-5 will only push 5 columns on sm view-ports or greater. This is because Bootst...
How to run only one task in ansible playbook?
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You should use tags: as documented in http://docs.ansible.com/playbooks_tags.html
If you have a large playbook it may become useful to be able to run a specific part of the configuration without running the whole playbook.
Both plays and tasks support a “tags:” attribute for...
Get all git commits since last tag
When I'm going to tag a commit, I need to know what changed since the last tagged commit. Eg:
2 Answers
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How should I edit an Entity Framework connection string?
...Excellent. This is exactly the answer I was looking for. Just to be safe I commented out the existing string (rather than delete it), saved the app.config changes, right-clicked the designer and chose Update Model From Database. The wizard then let me include the sensitive info (uid & pwd) in th...
How to run a class from Jar which is not the Main-Class in its Manifest file
... able to run each one of those as per the need. I am trying to run it from command-line on Linux box.
7 Answers
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Git pull without checkout?
I'm used to running git pull and other commands from within a branch I'm working on. But I have set up a development server that several people work on, so I don't want to have to switch branches when I do it. If I want to update an existing branch on the dev server from the github repository we a...
What does “@” mean in Windows batch scripts
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It means not to output the respective command. Compare the following two batch files:
@echo foo
and
echo foo
The former has only foo as output while the latter prints
H:\Stuff>echo foo
foo
(here, at least). As can be seen the command that is run is v...