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HashSet vs LinkedHashSet
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You should look at the source of the HashSet constructor it calls... it's a special constructor that makes the backing Map a LinkedHashMap instead of just a HashMap.
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How do I move files in node.js?
...t.
http://nodejs.org/docs/latest/api/fs.html#fs_fs_rename_oldpath_newpath_callback
fs.rename(oldPath, newPath, callback)
Added in: v0.0.2
oldPath <String> | <Buffer>
newPath <String> | <Buffer>
callback <Function>
Asynchronous rename(2). No arguments ot...
How does the Amazon Recommendation feature work?
...ence. Typical fields of study revolve around market basket analysis (also called affinity analysis) which is a subset of the field of data mining. Typical components in such a system include identification of primary driver items and the identification of affinity items (accessory upsell, cross se...
Passing a dictionary to a function as keyword parameters
I'd like to call a function in python using a dictionary.
4 Answers
4
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What does “=>” mean in PHP?
...sword"
// "steve's pass is: secr3t"
Note that this can be used for numerically indexed arrays too.
Example:
$foo = array('car', 'truck', 'van', 'bike', 'rickshaw');
foreach ($foo as $i => $type) {
echo "{$i}: {$type}\n";
}
// prints:
// 0: car
// 1: truck
// 2: van
// 3: bike
// 4: ricksh...
Catch multiple exceptions at once?
...g: a little irony/sarcasm ahead) why on earth go to all this effort to basically just replace the following:
try
{
// try some stuff
}
catch( FormatException ex ){}
catch( OverflowException ex ){}
catch( ArgumentNullException ex ){}
...with some crazy variation of this next code smell, I mean...
JavaScript, elegant way to check nested object properties for null/undefined [duplicate]
...se of using the app this gets populated. Let's say somwhere, after an AJAX call or something i do this:
4 Answers
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A 'for' loop to iterate over an enum in Java
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.values()
You can call the values() method on your enum.
for (Direction dir : Direction.values()) {
// do what you want
}
This values() method is implicitly declared by the compiler. So it is not listed on Enum doc.
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Default argument values in JavaScript functions [duplicate]
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In javascript you can call a function (even if it has parameters) without parameters.
So you can add default values like this:
function func(a, b){
if (typeof(a)==='undefined') a = 10;
if (typeof(b)==='undefined') b = 20;
//your code
}...
Kotlin secondary constructor
...his(name) {
parent.children.add(this)
}
}
it is mandatory to call the primary constructor otherwise, the compiler will throw the following error
Primary constructor call expected
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