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How to implement Enums in Ruby?
... is very similar (and more with features) to Java, C++ enums.
Quoted from http://edgeapi.rubyonrails.org/classes/ActiveRecord/Enum.html :
class Conversation < ActiveRecord::Base
enum status: [ :active, :archived ]
end
# conversation.update! status: 0
conversation.active!
conversation.active?...
MySQL: Transactions vs Locking Tables
...ctions to be able to read that row while your transaction is in progress.
http://dev.mysql.com/doc/refman/5.0/en/innodb-locking-reads.html
START TRANSACTION WITH CONSISTENT SNAPSHOT will not do the trick for you, as other transactions can still come along and modify that row. This is mentioned rig...
What version of javac built my jar?
...d look at byte offsets 4 through 7. The version information is built in.
http://en.wikipedia.org/wiki/Java_class_file
Note: As mentioned in the comment below,
those bytes tell you what version the class has been compiled FOR, not
what version compiled it.
...
Wrap a delegate in an IEqualityComparer
Several Linq.Enumerable functions take an IEqualityComparer<T> . Is there a convenient wrapper class that adapts a delegate(T,T)=>bool to implement IEqualityComparer<T> ? It's easy enough to write one (if your ignore problems with defining a correct hashcode), but I'd like to know...
How to deal with INSTALL_PARSE_FAILED_INCONSISTENT_CERTIFICATES without uninstall?
... answered Jul 6 '10 at 11:36
CommonsWareCommonsWare
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How to remove padding around buttons in Android?
...;?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@drawable/notifications_toggle_on"
android:state_checked="true"/>
<item android:drawable="@drawable/n...
Alarm Manager Example
...<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.alarmexample" >
<uses-permission android:name="android.permission.VIBRATE" />
<application
android:allowBackup="true"...
What are valid values for the id attribute in HTML?
... edited Dec 11 '19 at 18:26
Community♦
111 silver badge
answered Sep 17 '08 at 1:42
dgviddgvid
...
How can I view all the git repositories on my machine?
... in which I can see all the git repositories that exist on my machine? Any command for that?
10 Answers
...
How to make a .jar out from an Android Studio project
...ow that. I could follow your the steps, but I still missing the org.apache.http.Header. How can I import it into my lib?
– dum4ll3
Feb 12 '14 at 16:04
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