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How to rollback a specific migration?
...1
Is a way to do this, if the migration you want to rollback is the last one applied. You can substitute 1 for however many migrations you want to go back.
For example:
rake db:rollback STEP=5
Will also rollback all the migration that happened later (4, 3, 2 and also 1).
To roll back all migr...
What does middleware and app.use actually mean in Expressjs?
...
I add a late answer to add something not mentioned in the previous answers.
By now it should be clear that middleware is/are function(s) run between the client request and the server answer. The most common middleware functionality needed are error managing, database in...
Should programmers use SSIS, and if so, why? [closed]
...loper for 10.
The value of SSIS is as a workflow engine to move data from one spot to another with maybe some limited transformation and conditional branching along the way. If your packages contain a lot of script then your team is using SSIS for the wrong tasks or isn't comfortable with SQL or ha...
Hash String via SHA-256 in Java
...out more information it would be hard to say why you are getting different ones. You should probably open a new question.
– Brendan Long
Aug 9 '10 at 21:16
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“Default Activity Not Found” on Android Studio upgrade
...ity, to be launched when the application starts.
You should have at least one activity that looks something like this:
<activity
android:name="com.your.package.name.YourActivity"
android:label="@string/app_name">
<intent-filter>
<action android:na...
How can mixed data types (int, float, char, etc) be stored in an array?
I want to store mixed data types in an array. How could one do that?
6 Answers
6
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SQL UPDATE SET one column to be equal to a value in a related table referenced by a different column
I hope that made sense, let me elaborate:
10 Answers
10
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Applying .gitignore to committed files
...ere's a lot of files though. I don't want to have do this for every single one
– user880954
Sep 23 '11 at 11:08
1
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Can an input field have two labels?
...ach information to controls. Each LABEL element is associated with exactly one form control.
Thus, each form control can be referenced by multiple labels, but each label can only reference one control. So if it makes sense to have a second label for a control (and in the situation you describe, it...
Which UUID version to use?
...network card MAC address and a timer. These IDs are easy to predict (given one, I might be able to guess another one) and can be traced back to your network card. It's not recommended to create these.
Version 4: These are generated from random (or pseudo-random) numbers. If you just need to generate...