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Rails Observer Alternatives for 4.0
...g used as a generic method for pub/sub? it does provide the basic building blocks, right? In other words, what are the up/downsides to wisper compared to ActiveSupport::Notifications?
– gingerlime
Aug 5 '14 at 6:37
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What is a 'Closure'?
...hat variable has a scope. Generally, local variables exist only within the block or function in which you declare them.
function() {
var a = 1;
console.log(a); // works
}
console.log(a); // fails
If I try to access a local variable, most languages will look for it in the current scope, th...
Are nested span tags OK in XHTML?
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Span will do what I tell it to! span { display:block } :D
– greaterKing
May 26 '17 at 0:25
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Resize HTML5 canvas to fit window
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I did this plus I also set canvas to display: block (it seemed to be defaulting to display: inline which was creating extra space!).
– Elisabeth
Apr 5 '12 at 22:00
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How to make a Bootstrap accordion collapse when clicking the header div?
...the panel-heading. Use this style to do so:
.panel-title a {
display: block;
padding: 10px 15px;
margin: -10px -15px;
}
Check this demo (http://jsfiddle.net/KbQyx/).
Then when you clicking on the heading, you are actually clicking on the <a>.
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Artificially create a connection timeout error
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Connect to an existing host but to a port that is blocked by the firewall that simply drops TCP SYN packets. For example, www.google.com:81.
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Why is an int in OCaml only 31 bits?
...ets of integers.
Anything that does not fit in in a word is allocated in a block in the
heap. The word representing this data is then a pointer to the block.
Since the heap contains only blocks of words, all these pointers are
aligned: their few least significants bits are always unset.
Argumentless...
What is the minimum valid JSON?
... to be one such example which only accepts objects and arrays as the root. PHP, on the other hand, specifically adds the exception that "it will also encode and decode scalar types and NULL".
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How do you add swap to an EC2 instance?
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if means 'input file', of means 'output file', bs means 'block size' and count is the number of blocks you want to allocate… you can read the man page of the command for more info: linux.die.net/man/1/dd
– Fábio Batista
May 19 '14 at 22:23
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How does one output bold text in Bash?
...e sequences for example here: ascii-table.com/ansi-escape-sequences-vt-100.php
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