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Ignoring time zones altogether in Rails and PostgreSQL
...a great answer, except for one serious flaw. As harmic commented, Postgres does not use Unix time. According to the doc: (a) The epoch is 2001-01-01 rather than Unix’ 1970-01-01, and (b) While Unix time has a resolution of whole seconds, Postgres keeps fractions of seconds. The number of fractiona...
Difference between
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@Bert F '<? super VEGETABLE>' does NOT describe what things you can add to 'foo' - it describes the kinds of Lists that 'foo' can point to. 'List<? super VEGETABLE> foo' means 'foo' is pointing at either List<VEGETABLE> or LIST<FOOD> at...
How to pass objects to functions in C++?
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@RC Still doesn't tell you if the pointer is const or not. Google's guidelines have come in for a lot of flak in the various C++ online communities - justifiably so, IMHO.
– anon
Jan 26 '10 at 12:...
What would cause an algorithm to have O(log log n) complexity?
...analysis of the recursion tree it can be shown that each layer in the tree does O(n) work. Therefore, the total runtime of the algorithm is O(n log log n).
O(log n) Algorithms on Small Inputs
There are some other algorithms that achieve O(log log n) runtimes by using algorithms like binary search o...
base64 encoded images in email signatures
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Tried this but Gmail doesn't seem to support it. The embedded attachment solution seems to work though.
– Indrek
Jun 5 '12 at 6:27
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OAuth 2.0: Benefits and use cases — why?
...ective, the main advantages I see in OAuth 2 are in reduced complexity. It doesn't require the request signing procedure, which is not exactly difficult but is certainly fiddly. It greatly reduces the work required to act as a client of a service, which is where (in the modern, mobile world) you mos...
Maintain the aspect ratio of a div with CSS
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This does not seem to work in a nested fashion. It works at the first level, but when trying to do the same thing inside of the div maintaining aspect ratio, the padding-bottom percentage seems to get applied to the width of the p...
Why do I need 'b' to encode a string with Base64?
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Thanks I am using, 3.x. Why does Python wants to convert it explictly to binary. The same in Ruby would be... requires > "base64" and then > Base64.encode64('data to be encoded')
– dublintech
Jan 18 '12 ...
How to read contacts on Android 2.0
...gument it breaks the query, I don't know why and it is frustrating that it does.
The second part of the code above is too slow, all the query calls just bog everything down. The following code is much faster. Just grab all the rows for the phone content and use the contact_ids to sort the data you...
Why is reading lines from stdin much slower in C++ than Python?
...t lie in replacing the read with an fscanf call, because that quite simply doesn't do as much work as Python does. Python must allocate memory for the string, possibly multiple times as the existing allocation is deemed inadequate - exactly like the C++ approach with std::string. This task is almost...