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Stream vs Views vs Iterators
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First, they are all non-strict. That has a particular mathematical meaning related to functions, but, basically, means they are computed on-demand instead of in advance.
Stream is a lazy list indeed. In fact, in Scala, a Stream is a List whose tail is a lazy val. Once computed, a value stay...
Why do x86-64 instructions on 32-bit registers zero the upper part of the full 64-bit register?
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Without zero extending to 64 bits, it would mean an instruction reading from rax would have 2 dependencies for its rax operand (the instruction that writes to eax and the instruction that writes to rax before it), this means that 1) the ROB would have to have entries f...
IllegalStateException: Can not perform this action after onSaveInstanceState with ViewPager
...look like you are trying to do some transaction for an up coming fragment, meanwhile the host activity already call savedInstanceState method(user may happen to touch the home button so the activity calls onStop(), in my case it's the reason)
Usually this problem shouldn't happen -- we always try t...
Find a Pull Request on Github where a commit was originally created
...racked these as actual Git objects but it makes perfect sense. BTW did you mean to use "upstream" instead of "origin" on your config command?
– Tobias J
Jan 29 '14 at 21:43
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Invalidating JSON Web Tokens
...king about switching over from a cookie based session approach (by this, I mean, storing an id to a key-value store containing user sessions in a user's browser) to a token-based session approach (no key-value store) using JSON Web Tokens (jwt).
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Why does Dijkstra's algorithm use decrease-key?
...is added to the priority queue for each of the m edges in the graph. This means that there are m enqueue operations and m dequeue operations on the priority queue, giving a total runtime of O(m Te + m Td), where Te is the time required to enqueue into the priority queue and Td is the time required ...
ValueError: math domain error
...the base after being given a number and the power it was raised to. log(0) means that something raised to the power of 2 is 0. An exponent can never result in 0*, which means that log(0) has no answer, thus throwing the math domain error
*Note: 0^0 can result in 0, but can also result in 1 at the s...
One DbContext per web request… why?
...ame context, in that case the transient lifestyle is fine...". What do you mean by "transient", specifically?
– Andrew
May 15 '12 at 23:09
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Is there a simple, elegant way to define singletons? [duplicate]
...e you fully clean up after logging you must call logging.shutdown(). This means you must import logging into the module which calls shutdown. If it was a singleton pattern it is possible to call shutdown on the instance in any module to which it is passed.
– Matt
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LEN function not including trailing spaces in SQL Server
...ode columns with version 100 collations now supports surrogate pairs. This means a single character may use up to 4 bytes, causing the divide by two trick to fail. See msdn.
– Frédéric
May 26 '15 at 15:25
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