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Error when trying vagrant up
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Gar, that was it. Why does it say "You are now ready to vagrant up your first virtual environment!" then??
– Matt
Jun 30 '15 at 21:55
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Easy interview question got harder: given numbers 1..100, find the missing number(s) given exactly k
.... + ak2 = b2
...
a1k + a2k + ... + akk = bk
Using Newton's identities, knowing bi allows to compute
c1 = a1 + a2 + ... ak
c2 = a1a2 + a1a3 + ... + ak-1ak
...
ck = a1a2 ... ak
If you expand the polynomial (x-a1)...(x-ak) the coefficients will be exactly c1, ..., ck - see Viète's formulas. Si...
SQlite Getting nearest locations (with latitude and longitude)
...w PointF((float) lat, (float) lon);
return newPoint;
}
And now create your query:
PointF center = new PointF(x, y);
final double mult = 1; // mult = 1.1; is more reliable
PointF p1 = calculateDerivedPosition(center, mult * radius, 0);
PointF p2 = calculateDerivedPosition(center, mul...
Best Way to read rss feed in .net Using C#
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This is an old post, but to save people some time if you get here now like I did, I suggest you have a look at the CodeHollow.FeedReader package which supports a wider range of RSS versions, is easier to use and seems more robust. https://github.com/codehollow/FeedReader
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What is the difference between “def” and “val” to define a function
...ng var as I need to change it to 3 later
val sq = x*x // evaluates right now
x = 3 // no effect! sq is already evaluated
println(sq)
Surprisingly, this will print 4 and not 9! val (even var) is evaluated immediately and assigned.
Now change val to def.. it will print 9! Def is a function cal...
When should you use constexpr capability in C++11?
...t b ) { return a * b; }
const int meaningOfLife = MeaningOfLife( 6, 7 );
Now you have something that can be evaluated down to a constant while maintaining good readability and allowing slightly more complex processing than just setting a constant to a number.
It basically provides a good aid to ma...
How to install a node.js module without using npm?
...roject use-gulp which
uses(requires) node_modules like gulp and gulp-util.
Now you want to make some modifications to gulp-util lib and test it locally with your use-gulp project...
Fork gulp-util project on github\bitbucket etc.
Switch to your project: cd use-gulp/node_modules
Clone gulp-util as g...
Java String remove all non numeric characters
...de:
String str = "a12.334tyz.78x";
str = str.replaceAll("[^\\d.]", "");
Now str will contain "12.334.78".
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Gridview with two columns and auto resized images
...white"
android:background="#55000000"/>
</FrameLayout>
Now make some sort of adapter for your GridView:
src/com/example/graphicstest/MyAdapter.java
private final class MyAdapter extends BaseAdapter {
private final List<Item> mItems = new ArrayList<Item>();
p...
How to check if a Ruby object is a Boolean
...String".boolean?
=> false
>> 1.boolean?
=> false
>> Time.now.boolean?
=> false
>> nil.boolean?
=> false
>> true.boolean?
=> true
>> false.boolean?
=> true
>> (1 ==1).boolean?
=> true
>> (1 ==2).boolean?
=> true
...