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Can hash tables really be O(1)?
...into the hash value, so it's O(1) regardless of text length (but massively more collision prone than GCC!). Separately, claims of O(1) have another assumption (normally correctly) that m is much less than n.
– Tony Delroy
Feb 20 '18 at 14:26
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How to modify a specified commit?
...ng), you may want to split that commit into two different commits (or even more). In that case, move back to the commit to edit, and run "git reset HEAD^". that will put the modified files of that commit into the stage. Now pick and commit any files as you wish. This flow is quite well explained i...
Formatting Phone Numbers in PHP
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This is a US phone formatter that works on more versions of numbers than any of the current answers.
$numbers = explode("\n", '(111) 222-3333
((111) 222-3333
1112223333
111 222-3333
111-222-3333
(111)2223333
+11234567890
1-8002353551
123-456-7890 -Hello!
+1...
Programmer Puzzle: Encoding a chess board state throughout a game
Not strictly a question, more of a puzzle...
31 Answers
31
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Using openssl to get the certificate from a server
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To make this a bit more concise, you can replace the sed with openssl x509, and read it in using a sub-shell: openssl x509 -in <(openssl s_client -connect server:port -prexit 2>/dev/null)
– Gabe Martin-Dempesy
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How to get a function name as a string?
... @RichardGomes functions are first-class objects, there can be more than name bound to them. It is not necessarily the case that f.__name__ == 'f'.
– wim
Mar 13 '14 at 20:13
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Why doesn't Python have a sign function?
... +/-nan, etc)
So they decided to implement only copysign, which (although more verbose) can be used to delegate to the end user the desired behavior for edge cases - which sometimes might require the call to cmp(x,0).
I don't know why it's not a built-in, but I have some thoughts.
copysign(x,y)...
Change Default Scrolling Behavior of UITableView Section Header
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What is array to pointer decay?
...numbers [5] cannot be re-pointed, i.e. you can't say numbers = 0x5a5aff23. More importantly the term decay signifies loss of type and dimension; numbers decay into int* by losing the dimension information (count 5) and the type is not int [5] any more. Look here for cases where the decay doesn't hap...
What is the “hasClass” function with plain JavaScript?
...replace(/[\n\t]/g, " ").indexOf(" thatClass ") > -1 )
To answer your more general question, you can look at jQuery's source code on github or at the source for hasClass specifically in this source viewer.
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