大约有 40,000 项符合查询结果（耗时：0.0442秒） [XML]
Git, see a list of comments of my last N commits
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how to generate migration to make references polymorphic
...or polymorphic associations. Generate a blank migration and then modify it by hand according to your needs.
Update:
You'll need to specify which table you're changing. According to this SO answer:
class AddImageableToProducts < ActiveRecord::Migration
def up
change_table :products do |t|...
Ruby send vs __send__
....send but I'm trying to figure out why you can call this both ways. The Ruby Koans imply that there is some reason beyond providing lots of different ways to do the same thing. Here are the two examples of usage:
...
Adding and removing style attribute from div with jquery
...voltaic_holder").removeAttr("style") it removes all applied style that was by default with newly added.
– 3 rules
Jul 13 '16 at 12:35
add a comment
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Android Fragments and animation
...lace is used).
The following code shows how you would replace a fragment by sliding out one fragment and sliding the other one in it's place.
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.setCustomAnimations(R.anim.slide_in_left, R.anim.slide_out_right);
DetailsFragment ne...
Entity framework code-first null foreign key
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Django Forms: if not valid, show form with error message
...form that I got in. The error messages have automatically been added to it by the is_valid() function.
– user984003
Feb 1 '13 at 13:57
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How to make an input type=button act like a hyperlink and redirect using a get request? [duplicate]
...his, but when I click the button, the whole page content jumps to the left by about 10px. Any ideas why this is / how to avoid this happening? Thanks in advance.
– Phill Healey
Mar 28 '13 at 18:11
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Bootstrap 3: Keep selected tab on page refresh
...In my app, I use ":" as hash value separator.
<ul class="nav nav-tabs" id="myTab">
<li class="active"><a href="#home">Home</a></li>
<li><a href="#profile">Profile</a></li>
<li><a href="#messages">Messages</a></li>
...
Java Class that implements Map and keeps insertion order?
... @CoryKendall: Does TreeMap not work? It is supposed to be sorted by keys, not by values.
– Michael Myers♦
Feb 5 '12 at 9:42
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