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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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Why does Node.js' fs.readFile() return a buffer instead of string?
I'm trying to read the content of test.txt (which is on the sam>me m> folder of the Javascript source) and display it using this code:
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remove all variables except functions
I have loaded in a R console different type of objects.
I can remove them all using
5 Answers
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getenv() vs. $_ENV in PHP
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According to the php docum>me m>ntation about getenv, they are exactly the sam>me m>, except that getenv will look for the variable in a case-insensitive manner. Most of the tim>me m> it probably doesn't matter, but one of the comm>me m>nts on the docum>me m>ntation explain...
What are the aspect ratios for all Android phone and tablet devices?
I'm looking for a list of all screen aspect ratios for popular Android based Phones and Tablets.
5 Answers
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How do I search within an array of hashes by hash values in ruby?
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You're looking for Enum>me m>rable#select (also called find_all):
@fathers.select {|father| father["age"] > 35 }
# => [ { "age" => 40, "father" => "Bob" },
# { "age" => 50, "father" => "Batman" } ]
Per the docum>me m>ntation, it "r...
error: ‘NULL’ was not declared in this scope
I get this m>me m>ssage when compiling C++ on gcc 4.3
6 Answers
6
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Base64: What is the worst possible increase in space usage?
...wanted to check it's length before converting,, say it wanted to always permit the final byte array to be 16KB. How big could a 16KB byte array possibly becom>me m> when converted to a Base64 string (assuming one byte per character)?
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Rails new vs create
Why is there a need to define a new m>me m>thod in RESTful controller, follow it up with a create m>me m>thod?
4 Answers
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How are cookies passed in the HTTP protocol?
... the following in its response header to set a cookie field.
Set-Cookie:nam>me m>=value
If there is a cookie set, then the browser sends the following in its request header.
Cookie:nam>me m>=value
See the HTTP Cookie article at Wikipedia for more information.
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