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Is there a short cut for going back to the beginning of a file by vi editor?
... of the file
NOTE : - g is case-sensitive (Thanks to @Ben for pointing it out)
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What are the mathematical/computational principles behind this game?
...uzzle makers decided that 55 is more round number than 57 and left 2 cards out.
We also get n+1 = 8, so from every point (card), 8 lines pass (8 pictures appear) and every line (picture) has 8 points (appears in 8 cards).
Here's a representation of the most famous finite projective (order-2) p...
Best way to assert for numpy.array equality?
...
check out the assert functions in numpy.testing, e.g.
assert_array_equal
for floating point arrays equality test might fail and assert_almost_equal is more reliable.
update
A few versions ago numpy obtained assert_allclose whic...
Counting array elements in Python [duplicate]
...the list.
Syntax:
len(myArray)
Eg:
myArray = [1, 2, 3]
len(myArray)
Output:
3
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How to insert element as a first child?
...ng on what @vabhatia said, this is what you want in native JavaScript (without JQuery).
ParentNode.insertBefore(<your element>, ParentNode.firstChild);
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How can I check a C# variable is an empty string “” or null? [duplicate]
... assigned to the stringVar variable, but converting the same stringVar without the cast returns null and empty string instead? Im just trying to find out all the variations.....
– Stokely
Aug 29 '17 at 21:39
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What's invokedynamic and how do I use it?
I keep hearing about all the new cool features that are being added to the JVM and one of those cool features is invokedynamic. I would like to know what it is and how does it make reflective programming in Java easier or better?
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GetHashCode Guidelines in C#
...o-operate with hash tables" or similar. Like most things, GetHashCode is about knowing when to break the rules.
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sqlite3-ruby install error on Ubuntu
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Tried ALL of other solutions, none helped.
It turned out that you also need dev package for ruby itself. For me, it helped
sudo apt-get install ruby-full
It has a lot of nasty dependencies though (like emacs, wtf?), just
sudo apt-get install ruby1.8-dev
should be fine. Af...
Convert String to double in Java
...meValue= "52.23";
Double doubleVal = Double.parseDouble(someValue);
System.out.println(doubleVal);
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