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Rake just one migration
...n a single migration that changed and needed to be re-run independently of all other migrations. Fire up the console and do this:
>> require 'db/migrate/your_migrations.rb'
=> ["YourMigrations"]
>> YourMigrations.up
=> etc... as the migration runs
>> YourMigration.down
Mor...
Javascript communication between browser tabs/windows [duplicate]
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You don't need to wait for DOM readiness in order to access localStorage
– meandre
Aug 13 '17 at 23:30
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Is there any sed like utility for cmd.exe? [closed]
...tem for Linux is a most "native" option, but it's not installed on Windows by default; it has sed, grep etc. out of the box, though.
https://github.com/mbuilov/sed-windows offers recent 4.3 and 4.4 versions, which support -z option unlike listed upper ports
If you don't want to install anything an...
Can I prevent text in a div block from overflowing?
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Try adding this class in order to fix the issue:
.ellipsis {
text-overflow: ellipsis;
/* Required for text-overflow to do anything */
white-space: nowrap;
overflow: hidden;
}
Explained further in this link http://css-tricks.com/almanac/pr...
SQL SELECT speed int vs varchar
...s I know this is an old post but can I kindly check...on the following: in order to query integers, i have to link each string column to another table (relationship). however, that means more joining operations are required for each query. How do i determine if this trade-off is worth it? Thank you!...
how to debug the js in jsfiddle
...ever using chrome dev tools. Press ctrl+shift+F and you can search through all the files in the source.
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python pandas: Remove duplicates by columns A, keeping the row with the highest value in column B
...k in your case you don't really need a groupby. I would sort by descending order your B column, then drop duplicates at column A and if you want you can also have a new nice and
clean index like that:
df.sort_values('B', ascending=False).drop_duplicates('A').sort_index().reset_index(drop=True)
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Can I set an opacity only to the background image of a div?
...n IE from version 8, while the ::before pseudo-element is not supported at all. This will hopefully be rectified in version 10.
HTML
<div class="myDiv">
Hi there
</div>
CSS
.myDiv {
position: relative;
z-index: 1;
}
.myDiv:before {
content: "";
position: absolut...
WCF chokes on properties with no “set ”. Any workaround?
...s problem with ASP.NET MVC and me wanting to use DataContractSerializer in order to be able to control the names on the items in the JSON output. Eventually I switched serializer to JSON.NET, which supports properties without setters (which DataContractSerializer doesn't) and property name control (...
Defining an array of anonymous objects in CoffeeScript
... define an array of anonymous objects in CoffeeScript? Is this possible at all, using the YAML syntax?
9 Answers
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