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Looping over a list in Python
... have a list with sublists in it. I want to print all the sublists with length equal to 3.
4 Answers
...
In Python, how do I create a string of n characters in one line of code?
...o start with 'a', and increment by one character each time (with wrapping > 26), here's a line:
>>> mkstring = lambda(x): "".join(map(chr, (ord('a')+(y%26) for y in range(x))))
>>> mkstring(10)
'abcdefghij'
>>> mkstring(30)
'abcdefghijklmnopqrstuvwxyzabcd'
...
How do you get the logical xor of two variables in Python?
... else:
return a or b
That way it can return a, b, or False:
>>> logical_xor('this', 'that')
False
>>> logical_xor('', '')
False
>>> logical_xor('this', '')
'this'
>>> logical_xor('', 'that')
'that'
...
Open the start page in Visual Studio after closing a project?
...
Visual Studio 2010-2015
There's a menu item View -> Start Page
Additionally you can choose to keep the start page open when loading a project. There's a check box below the projects list for that.
(Tested in VS2010, VS2012, VS2013, VS2015)
In current versions, you can also...
Change values while iterating
.../www.google.com"},
},
}
fmt.Println(n)
for i := 0; i < len(n.Attr); i++ {
attr := &n.Attr[i]
if attr.Key == "href" {
attr.Val = "something"
}
}
fmt.Println(n)
}
Output:
{[{key value} {href http://www.google.com}]}
{[{key val...
Testing Abstract Classes
...ctClass
{
public function concreteMethod()
{
return $this->abstractMethod();
}
public abstract function abstractMethod();
}
class AbstractClassTest extends PHPUnit_Framework_TestCase
{
public function testConcreteMethod()
{
$stub = $this->getMockForAbs...
Node.js version on the command line? (not the REPL)
...
This works in 6.8.0: >node -v v6.8.0 >node --version v6.8.0
– Doctor Jones
Oct 13 '16 at 13:24
1
...
How can I check if a scrollbar is visible?
... $.fn.hasScrollBar = function() {
return this.get(0).scrollHeight > this.height();
}
})(jQuery);
use it like this,
$('#my_div1').hasScrollBar(); // returns true if there's a `vertical` scrollbar, false otherwise..
tested working on Firefox, Chrome, IE6,7,8
but not working properly o...
Difference between HashSet and HashMap?
...lity hash functions. This is critical because HashMap uses power-of two length hash tables." weblogs.java.net/blog/2005/06/18/hashmap-implementation - however, if you look at the doc you'll see that this hash distributes things over "buckets", so in the end I believe two things can get mapped the sa...
Convert a Scala list to a tuple?
...'t do this in a typesafe way. Why? Because in general we can't know the length of a list until runtime. But the "length" of a tuple must be encoded in its type, and hence known at compile time. For example, (1,'a',true) has the type (Int, Char, Boolean), which is sugar for Tuple3[Int, Char, Boolean]...