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Drawing a dot on HTML5 canvas [duplicate]
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For performance reasons, don't draw a circle if you can avoid it. Just draw a rectangle with a width and height of one:
ctx.fillRect(10,10,1,1); // fill in the pixel at (10,10)
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Index of Currently Selected Row in DataGridView
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If it's anything like Excel, the selected list can be many rows/columns, but there is only one current/active cell. I only care about the current row so this should do fine.
– ErikE
Aug ...
Why is Github asking for username/password when following the instructions on screen and pushing a n
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That's a good point, if you include the username it'll be handled by the OS keychain (at least it should in OSX, and apparently in Windows too). There's no difference between editing the file with notepad or with vim/emacs/nano/vi, I wouldn't wor...
Recommended way to stop a Gradle build
...ered something invalid, or GradleScriptException for more general errors.
If you want to stop the current task or action, and move on to the next, you can also throw a StopActionException
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i...
How default .equals and .hashCode will work for my classes?
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Yes, the default implementation is Object's (generally speaking; if you inherit from a class that redefined equals and/or hashCode, then you'll use that implementation instead).
From the documentation:
equals
The equals method for class Object implements the most discriminating possi...
In Clojure, when should I use a vector over a list, and the other way around?
...de" "generating back-to-front" -> means precisely?? I am really having difficulty with this question because in my book laziness + declarative style = far better performance, and yet vectors are suggested everywhere in Clojure which leaves me totally confused.
– Jimmy Hoffa
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How to set a selected option of a dropdown list control using angular JS
... a selected option of a dropdown list control using angular JS. Forgive me if this is ridiculous but I am new with Angular JS
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Regular expression to return text between parenthesis
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If your problem is really just this simple, you don't need regex:
s[s.find("(")+1:s.find(")")]
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How to prove that a problem is NP complete?
...e information C, you can create a polynomial time algorithm V that will verify for every possible input X whether X is in your domain or not.
Example
Prove that the problem of vertex covers (that is, for some graph G, does it have a vertex cover set of size k such that every edge in G has at least o...
How to get a number of random elements from an array?
...ew Array(n),
len = arr.length,
taken = new Array(len);
if (n > len)
throw new RangeError("getRandom: more elements taken than available");
while (n--) {
var x = Math.floor(Math.random() * len);
result[n] = arr[x in taken ? taken[x] : x];
tak...