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How to rollback just one step using rake db:migrate

After adding migration files in the db/migrate folder and running rake db:migrate , I want get back to the previous step, I think using VERSION=n is the right way to do that, but I don't know the correct value of n to use. Is there any command to check the current n value? ...
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Getting current unixtimestamp using Moment.js

I want to get the Unix TimeStamp using Moment.js. I can find many functions which convert timestamp to date in moment.js. I know that I can easily get the unix timestamp by using the following JavaScript function: Math.floor(new Date().getTime()/1000) . ...
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Editing the git commit message in GitHub

Is there any way of online editing the commit message in GitHub.com , after submission? 6 Answers ...
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How to add lines to end of file on Linux

I want to add the following 2 lines... 1 Answer 1 ...
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What are the big improvements between guava and apache equivalent libraries?

We currently use apache collections, string utils, etc. I need to decide if we should switch from the apache foundations implementation. ...
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difference between iframe, embed and object elements

HTML5 defines several embedded content elements, which, from a bird's-eye view, seem to be very similar to the point of being largely identical. ...
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django admin - add custom form fields that are not part of the model

I have a model registered in the admin site. One of its fields is a long string expression. I'd like to add custom form fields to the add/update page of this model in the admin that based on these fields values I will build the long string expression and save it in the relevant model field. ...
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How to merge remote master to local branch

I have a local branch of a project ("configUpdate") that I've forked from somebody else's project and I've done a load of changes on it and would like to merge the changes they've made in to my local branch. ...
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PHP: Move associative array element to beginning of array

What would be the best method of moving any element of an associative array to the beginning of the array? 6 Answers ...
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gitignore does not ignore folder

In the root of my project I have a foo folder. Inside the foo folder I have a bar folder. I would like to ignore all changes to all files inside my bar folder. I have this in my gitignore : ...