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2019-10-24T00:00:00.181Z
What is meant by the 181Z here? I have seen Z stands for Zulu time. But what is with the other three digits "181" here?
So is this an ISO8601 formatted time?
The 181 are the milliseconds. For example, JavaScript's Date.prototype.toISOString() method returns an ISO date string in this format.
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I am struggling so answer the following question. I think the reason I am not doing it correctly is because i starts at 0 rather than 1, but I am not sure how to do it.
The sum is equivalent to 3(n+1) + sum_{i=1}^n 2i, which is 3(n+1) + 2*n*(n+1)/2 = 3(n+1) + n(n+1) = (n+3)(n+1).
The result is thus (n+3)(n+1). The whole derivation is here.
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Is there a way to pull a random element from a list? Like say, picking a random name from a list of 10 names.
You can use Array#sample if the list is an array:
names.sample
Otherwise, if it's a string, you can convert it into an array first:
names.split.sample
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Why does Apple not allow letters in Build Number in XCode? Especially considering their own build numbers always have a letter?
Just curious...
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What is the basic and essential difference between Concatenate and Append
"Concatenate" joins two specific items together, whereas "append" adds what you specify to whatever may already be there.
When use Concat or append on two strings they both may give you same result when you output them
but the
main difference is on using concatenation new string object is created where as its not the same in case of StrinBuffer APPEND()
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I am testing/searching tests for my image manipulation algorithm and I have come across to "lena.png" multiple times. Why? Is it some kind of standard algorithm testing picture? I would like to know the history behind the picture.
Is there other similars pictures I could use? Why?