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How to select rows that have current day's timestamp?
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use DATE and CURDATE()
SELECT * FROM `table` WHERE DATE(`timestamp`) = CURDATE()
I guess using DATE still uses INDEX.
see the execution plan on the DEMO
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Count lines of code in all java classes in Android Studio
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Go to
https://plugins.jetbrains.com/idea/plugin/4509-statistic
and install the latest version
To install
Run Android Studio
From the menu bar, select File-->Settings
Under IDE Settings, click Plugins, and then click Install plugin from disk
Navigate to the folder where you download...
How do I manipulate a variable whose name conflicts with PDB commands?
...be omitted unless the first word of the statement resembles a debugger command. [...]
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Is using a lot of static methods a bad thing?
...eep track of internal states. For example, if I need to transform A into B and don't rely on some internal state C that may vary, I create a static transform. If there is an internal state C that I want to be able to adjust, then I add a constructor to set C and don't use a static transform.
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Can I underline text in an Android layout?
How can I define underlined text in an Android layout xml file?
25 Answers
25
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Rails: Adding an index after adding column
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rails generate migration AddUserRefToProducts user:references
This command will generate the following migration:
class AddUserRefToProducts < ActiveRecord::Migration
def change
add_reference :user, :product, index: true
end
end
After running rake db:migrate both a user_id column a...
How to revert a folder to a particular commit by creating a patch
...set e095 -- somefolder
However git reset doesn't update the working copy and the --hard option doesn't work with folders. So then use git checkout to make the working copy the same as the index:
git checkout -- somefolder
and then if you also want to remove any files added you also need todo:
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How to pattern match using regular expression in Scala?
... would like to be able to find a match between the first letter of a word, and one of the letters in a group such as "ABC". In pseudocode, this might look something like:
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How to disable margin-collapsing?
...apsing margins between adjacent elements
Collapsing margins between parent and child elements
Using a padding or border will prevent collapse only in the latter case. Also, any value of overflow different from its default (visible) applied to the parent will prevent collapse. Thus, both overflow: ...
How to simplify a null-safe compareTo() implementation?
...od for a simple class such as this (to be able to use Collections.sort() and other goodies offered by the Java platform):
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