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JavaScript math, round to two decimal places [duplicate]
...to deal with turning a negative number positive before doing the rounding, then turning it back before returning the result.
function roundTo(n, digits) {
var negative = false;
if (digits === undefined) {
digits = 0;
}
if( n < 0) {
negative = true;
n = n ...
Regex not operator
... put it inside: which one did you try? Also: if you want (20019) to match, then you must add the \) inside your lookahead: \((?![\d]{4}\))[0-9a-zA-z _\.\-:]+\)
– Joachim Sauer
Sep 6 '11 at 9:00
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How to pause a YouTube player when hiding the iframe?
... When the user clicks on a link, this div becomes visible, the user should then be able to play the video.
14 Answers
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Different ways of loading a file as an InputStream
... following location: "java/lang/myfile.txt". If your path starts with a /, then it will be considered an absolute path, and will start searching from the root of the classpath. So calling String.class.getResourceAsStream("/myfile.txt") will look at the following location in your class path ./myfile....
Calling a parent window function from an iframe
...ame document must match by protocol and domain name. If it does not happen then you will get a security error as it is not allow to have cross domain scripting.
– a4bike
Sep 2 '15 at 16:08
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Setting the correct encoding when piping stdout in Python
...
nosklo: Then how can it work reliably and automaticly when output is a terminal?
– Rasmus Kaj
May 31 '10 at 15:36
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Overriding class constants vs properties
...ou're calling self in ChildClass, so it uses the variable from that class. Then you use self in ParentClass, so it wil then refer to the variable in that class.
if you still want the child class to override the const of the parent class, then adjust the following code in your parent class to this:
...
Create instance of generic type in Java?
...if getActualTypeArguments()[0] is returning a ParameterizedType. If it is, then you want to get the raw type, and create an instance of that instead.
– crush
Aug 20 '14 at 15:42
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Memoization in Haskell?
...ree where
fmap f (Tree l m r) = Tree (fmap f l) (f m) (fmap f r)
And then we'll define a way to index into it, so we can find a node with index n in O(log n) time instead:
index :: Tree a -> Int -> a
index (Tree _ m _) 0 = m
index (Tree l _ r) n = case (n - 1) `divMod` 2 of
(q,0) -&...
How to replace an entire line in a text file by line number
....e. line) number 4, replace the whole record with the string "different". Then for every input record, print the record.
Clearly my AWK skills are rusty! Thank you, @chepner.
EDIT: and see also an even shorter version from @Dennis Williamson:
awk 'NR==4 {$0="different"} 1' input_file.txt
How ...