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When to use symbols instead of strings in Ruby?
...emory instead of instantiate it again. This is less expensive than initializing a new string every time.
You can get a list all symbols that are already instantiated with the command Symbol.all_symbols:
symbols_count = Symbol.all_symbols.count # all_symbols is an array with all
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Rails hidden field undefined method 'merge' error
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Difference between 'self' and 'total' in Chrome CPU Profile of JS
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Xcode variables
...n
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answered May 21 '09 at 17:17
smorgansmorgan
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JNI converting jstring to char *
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Stoica Mircea
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answered Nov 15 '10 at 6:35
Jason RogersJason Rogers
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Initialize a long in Java
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How can I get pg_dump to authenticate properly
...hener
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CSS: transition opacity on mouse-out?
...0px;
background:red;
-webkit-transition: opacity 1s ease-in-out;
-moz-transition: opacity 1s ease-in-out;
-ms-transition: opacity 1s ease-in-out;
-o-transition: opacity 1s ease-in-out;
transition: opacity 1s ease-in-out;
}
.item:hover {
zoom: 1;
filter: alpha(opacity=50);
opacity...
CSS selector with period in ID
...s
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Meaning of …interface{} (dot dot dot interface)
... function with such a parameter is called variadic and may be invoked with zero or more arguments for that parameter.
A parameter:
a ...interface{}
Is, for the function equivalent to:
a []interface{}
The difference is how you pass the arguments to such a function. It is done either by giving each...