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Rails migrations: self.up and self.down versus change
...hout problems). For example, in your case what is the reverse operation of add_column to call when you rollback? Of course it's remove_column. What is the inverse of create_table? It's drop_table. So in these cases rails know how to rollback and define a down method is superfluous (you can see in th...
Best Practice: Initialize JUnit class fields in setUp() or at declaration?
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Less aggressive compilation with CSS3 calc
...is is an option since it is a major breaking change. Early betas of 1.4.0 had this option on by default. The release version has it off by default.
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How to handle floats and decimal separators with html5 input type number
...se the DOM API directly to get the elements's validity.valid property.
I had a similar issue with the decimal point, but the reason I realized there was an issue was because of the styling that Twitter Bootstrap adds to a number input with an invalid value.
Here's a fiddle demonstrating that the a...
How do I force git to checkout the master branch and remove carriage returns after I've normalized f
Okay, so I added the file .gitattributes with lines like this
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How to efficiently concatenate strings in go
In Go, a string is a primitive type, which means it is read-only, and every manipulation of it will create a new string.
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How to iterate through a DataTable
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DataTable dt = new DataTable();
SqlDataAdapter adapter = new SqlDataAdapter(cmd);
adapter.Fill(dt);
foreach(DataRow row in dt.Rows)
{
TextBox1.Text = row["ImagePath"].ToString();
}
...assumes the connection is open and the command is set up properly. I als...
MySQL Query - Records between Today and Last 30 Days
I want to return all records that were added to the database within the last 30 days. I need to convert the date to mm/dd/yy because of display purposes.
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Grep regex NOT containing string
... to grep to check against a syslog file. They are usually matching an IP address and log entry;
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How to restart a rails server on Heroku?
... alias hra='heroku restart --app '
Which you can make a permanent alias by adding it to your .bashrc or .bash_aliases file as described at:
https://askubuntu.com/questions/17536/how-do-i-create-a-permanent-bash-alias and
Creating permanent executable aliases
Then you can just type hra app_name
You ...