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Check if a table exists in Rails
I have a rake task that won't work unless a table exists. I'm working with more than 20 engineers on a website so I want to make sure they have migrated the table before they can do a rake task which will populate that respective table.
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Are HTTP headers case-sensitive?
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For anyone looking, here is where RFC 7230 explicitly states that field headers should be treated as case insensitive: tools.ietf.org/html/rfc7230#section-3.2
– J Z
Aug 9 '17 at 19:12
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Manipulate a url string by adding GET parameters
... to URLs that may and may not contain GET parameters without repeating ? or & .
15 Answers
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Python Dictionary Comprehension
Is it possible to create a dictionary comprehension in Python (for the keys)?
8 Answers
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What's the fuss about Haskell? [closed]
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The way it was pitched to me, and what I think is true after having worked on learning on Haskell for a month now, is the fact that functional programming twists your brain in interesting ways: it forces you to think about familiar problems in different ways: instead of loops, think in maps an...
Share application “link” in Android
... way to enable users to directly go to the install screen of market place for instance. All I can provide them with is a web link or some text.
In other words I am looking for a very direct way for android users to have my app installed.
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What should my Objective-C singleton look like? [closed]
My singleton accessor method is usually some variant of:
26 Answers
26
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What does it mean in shell when we put a command inside dollar sign and parentheses: $(command)
...understand following line of code in shell. It is used to get the current working directory. I am aware that $(variable) name return the value inside the variable name, but what is $(command) supposed to return? Does it return the value after executing the command? In that case, we can use ` t...
What are “res” and “req” parameters in Express functions?
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req is an object containing information about the HTTP request that raised the event. In response to req, you use res to send back the desired HTTP response.
Those parameters can be named anything. You could change that code to this if it's more clear:
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CSS container div not getting height
...dd the following property:
.c{
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overflow: hidden;
}
This will force the container to respect the height of all elements within it, regardless of floating elements.
http://jsfiddle.net/gtdfY/3/
UPDATE
Recently, I was working on a project that required this trick, but needed to allow overf...