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Easy interview question got harder: given numbers 1..100, find the missing number(s) given exactly k
...1k + a2k + ... + akk = bk
Using Newton's identities, knowing bi allows to compute
c1 = a1 + a2 + ... ak
c2 = a1a2 + a1a3 + ... + ak-1ak
...
ck = a1a2 ... ak
If you expand the polynomial (x-a1)...(x-ak) the coefficients will be exactly c1, ..., ck - see Viète's formulas. Since every polynomial...
What is Serialization?
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An object in memory will be formatted by the compiler, OS and/or hardware. Change your compiler and you change your format. A serialized object will have a format defined by your code, so you can guarantee the format. This is also helpful when sending objects across a n...
Inline elements shifting when made bold on hover
... This is a great solution! Out of curiousity, is there a difference in outcome between "a:after" and "a::after"?
– mattroberts33
Dec 10 '14 at 9:10
5
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Access denied for user 'root@localhost' (using password:NO)
...low the instruction aand create a text file and call it from the mentioned command, after that I face with 100608 [warning] --default-character-set is deprecated and will be removed in a future release. please use --character-set-server instead .-------------------------------- and finally when I st...
Open URL in same window and in same tab
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You need to use the name attribute:
window.open("https://www.youraddress.com","_self")
Edit: Url should be prepended with protocol. Without it tries to open relative url. Tested in Chrome 59, Firefox 54 and IE 11.
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Best branching strategy when doing continuous integration?
... We added support to Bamboo to do branch per task codicesoftware.blogspot.com/2012/02/…, and it seems their newest version will do it natively with several version controls, including dvcs.
– pablo
Apr 5 '12 at 17:38
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How to detect my browser version and operating system using JavaScript?
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@JohnOdom New systems, (e.g. the upcoming Steam box) probably have their own names; and existing systems might change their names or shorthands. You will never be up-to-date, unless you use some sort of global database to get that information from; since this ...
RabbitMQ / AMQP: single queue, multiple consumers for same message?
... your problem, but could be useful for people to know. example here http://www.rabbitmq.com/tutorials/tutorial-two-java.html under Fair Dispatch
– Ommit
Jan 27 '15 at 22:35
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Determining the last changelist synced to in Perforce
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I recommend the opposite for automatic build systems: you should first get the latest changelist from the server using:
p4 changes -s submitted -m1
then sync to that change and record it in the revision info. The reason is as...
Associating enums with strings in C#
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Only down side I can come up with is that it would be a tiny bit slower, but this would in most cases be neglectable. And it wouldn't have the exact same behaviour in the editor. E.G.: switching over this one wouldn't automatically fill in a case...