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How to use concerns in Rails 4
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So I found it out by myself. It is actually a pretty simple but powerful concept. It has to do with code reuse as in the example below. Basically, the idea is to extract common and / or context specific chunks of code in order to clean up the models and avoid them...
SSH to Elastic Beanstalk instance
...ty group to add a rule for SSH access. The below will lock it down to only allow ingress from a specific IP address.
SSH | tcp | 22 | 22 | 192.168.1.1/32
Configure the environment of your Elastic Beanstalk Application
If you haven't made a key pair yet, make one by clicking Key Pairs below Sec...
When to choose checked and unchecked exceptions
...eople misunderstand what this means.
Predictable but unpreventable: The caller did everything within their power to validate the input parameters, but some condition outside their control has caused the operation to fail. For example, you try reading a file but someone deletes it between the time ...
html (+css): denoting a preferred place for a line break
... Text </span>
it will wrap first in preferred blocks and then in smaller fragments as needed.
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Iterator Loop vs index loop [duplicate]
... including continue, break, return
}
Advantages: more generic, works for all containers (even the new unordered associative containers, can also use different strides (e.g. std::advance(it, 2));
Disadvantages: need extra work to get the index of the current element (could be O(N) for list or forw...
Button background as transparent
...r, your problem seems to be a bit deeper, as you're using selectors in a really weird way. The way you're using it seems wrong, although if it actually works, you should be putting the background image in the style as an <item/>.
Take a closer look at how styles are used in the Android source...
How to check if a specific key is present in a hash or not?
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edited Mar 8 '16 at 21:32
answered Dec 24 '10 at 22:09
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How does the String class override the + operator?
...emp="x = "+x;
The compiler converts "x = "+x; into a StringBuilder internally and uses .append(int) to "add" the integer to the string.
5.1.11. String Conversion
Any type may be converted to type String by string conversion.
A value x of primitive type T is first converted to a referenc...
Just disable scroll not hide it?
...op property via javascript just before the layer opening, you could dynamically assign that value as top property of the body element: with this approach the page will stand in its place, no matter if you're on top or if you have already scrolled.
Css
.noscroll { position: fixed; overflow-y:scrol...
How did I get a value larger than 8 bits in size from an 8-bit integer?
...sible results for undefined behaviour is a valid consequence, there is actually no undefined behaviour in your code. What's happening is that the compiler thinks the behaviour is undefined, and optimises accordingly.
If c is defined as int8_t, and int8_t promotes to int, then c-- is supposed to per...