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What is the difference between 'my' and 'our' in Perl?
... strict without getting typo warnings or compile-time errors. Since Perl 5.6, it has replaced the obsolete use vars, which was only file-scoped, and not lexically scoped as is our.
For example, the formal, qualified name for variable $x inside package main is $main::x. Declaring our $x allows you t...
AngularJS: Service vs provider vs factory
...ion(a) {
return a*2;
});
function Controller(b) {
expect(b).toEqual(246);
}
So factory is a function which is responsible for creating the value. Notice that the factory function can ask for other dependencies.
But what if you want to be more OO and have a class called Greeter?
function Greete...
How to access the ith column of a NumPy multidimensional array?
... |
edited Jan 20 '16 at 9:06
jhrs21
34155 silver badges1919 bronze badges
answered Dec 15 '10 at ...
How to pick just one item from a generator?
...
Sven MarnachSven Marnach
446k100100 gold badges833833 silver badges753753 bronze badges
...
Python argparse mutual exclusive group
...
106
add_mutually_exclusive_group doesn't make an entire group mutually exclusive. It makes options w...
What's the difference between using CGFloat and float?
...e introduced to make it easier to write code that works on both 32-bit and 64-bit without modification. However, if all you need is float precision within your own code, you can still use float if you like — it will reduce your memory footprint somewhat. Same goes for integer values.
I suggest y...
Map over object preserving keys
...: 2, three: 3 }, function (v) { return v * 3; });
// => { one: 3, two: 6, three: 9 }
DEMO
With Lodash
Lodash provides a function _.mapValues to map the values and preserve the keys.
_.mapValues({ one: 1, two: 2, three: 3 }, function (v) { return v * 3; });
// => { one: 3, two: 6, thre...
Remove duplicate elements from array in Ruby
...autiful language!
– Adam Waite
Jun 26 '13 at 20:41
3
This also works for complex types: [{how: ...