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How do I make a transparent canvas in html5?
...ly invisible but the background of the page body was visible. The drawings from the transparent canvas on top were visible while the opaque canvas below it was not.
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What is the difference between aggregation, composition and dependency? [duplicate]
...n - separable part to whole. The part has a identity of its own, separate from what it is part of. You could pick that part and move it to another object. (real world examples: wheel -> car, bloodcell -> body)
Composition - non-separable part of the whole. You cannot move the part to anothe...
Difference between .tagName and .nodeName
...a pretty good explanation of the difference between the two.
Added text from the article:
tagName and nodeName are both useful Javascript properties for
checking the name of an html element. For most purposes, either will
do fine but nodeName is preferred if you are supporting only A-grad...
What does the (unary) * operator do in this Ruby code?
...t has three objects
ArgumentError: wrong number of arguments (1 for 3)
from (irb):12:in 'func'
from (irb):12
>> func(*list) #But we CAN call func with an unpacked array.
1
2
3
=> nil
That's it!
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Exclude a sub-directory using find
...coming*"
Explanation:
find /home/feeds/data: start finding recursively from specified path
-type f: find files only
-not -path "*def/incoming*": don't include anything with def/incoming as part of its path
-not -path "*456/incoming*": don't include anything with 456/incoming as part of its path
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Array.Add vs +=
...
Because it's inherited from IList. Try Get-Member -InputObject @() will show this Add Method int IList.Add(System.Object value)
– Frode F.
Jun 29 '17 at 12:21
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How to impose maxlength on textArea in HTML using JavaScript
...st.
Inspired by, but an improvement over Dana Woodman's answer:
Changes from that answer are: Simplified and more generic, using jQuery.live and also not setting val if length is OK (leads to working arrow-keys in IE, and noticable speedup in IE):
// Get all textareas that have a "maxlength" pro...
Which regular expression operator means 'Don't' match this character?
... is "begining of string"
[^a-z] matches any single character that is not from "a" to "z"
^[a-z] means string starts with from "a" to "z"
Reference
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In Python, how do I create a string of n characters in one line of code?
...nly one line of code (not counting the import statements and defining n):
from random import choice
from string import ascii_lowercase
n = 10
string_val = "".join(choice(ascii_lowercase) for i in range(n))
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How to access test resources in Scala?
...urce is a path relative to
// the resources directory.
val source = Source.fromURL(getClass.getResource("/data.xml"))
Of course that source is now just a normal Scala IO object so you can do anything you want with it, like reading the contents and using it for test data.
There are other methods t...