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How to drop columns using Rails migration
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938
remove_column :table_name, :column_name
For instance:
remove_column :users, :hobby
would r...
How to find the last day of the month from date?
...in the month of a given date (see the docs for date):
$a_date = "2009-11-23";
echo date("Y-m-t", strtotime($a_date));
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Super-simple example of C# observer/observable with delegates
...e null check, initialize your event like this: stackoverflow.com/questions/340610/…
– Dinah
Aug 8 '09 at 20:32
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linq where list contains any in list
...your query
– shaijut
Mar 29 '15 at 13:51
@stom: We don't have nearly enough information to help you with that - you sh...
Why is NaN not equal to NaN? [duplicate]
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edited May 23 '17 at 12:34
Community♦
111 silver badge
answered May 14 '14 at 23:06
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Loop through all nested dictionary values?
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edited Mar 11 at 5:34
Antti Haapala
109k2121 gold badges223223 silver badges258258 bronze badges
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How do I create a Bash alias?
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273
You can add an alias or a function in your startup script file. Usually this is .bashrc, .bash_l...
乐高 EV3 实验01 - 连上机器人，让马达转起来 · App Inventor 2 中文网
... 搜索 乐高 EV3 实验01 - 连上机器人，让马达转起来
实验01：连上机器人，让马达转起来
这个实验做完你会得到什么
一、器材清单
二、...
Extract a substring according to a pattern
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243
Here are a few ways:
1) sub
sub(".*:", "", string)
## [1] "E001" "E002" "E003"
2) strsplit
sapp...
How to create a jQuery plugin with methods?
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313
According to the jQuery Plugin Authoring page (http://docs.jquery.com/Plugins/Authoring), it's...