I am using the following node.js code to download documents from some url and save it in the disk. I want to be informed about when the document is downloaded. i have not seen any callback with pipe.Or, Is there any 'end' event that can be captured on completion of download ? ...

For an exercise I'm doing, I'm trying to read the contents of a given file twice using the read() method. Strangely, when I call it the second time, it doesn't seem to return the file content as a string? ...

I have a multithreaded app that has to read some data often, and occasionally that data is updated. Right now a mutex keeps access to that data safe, but it's expensive because I would like multiple threads to be able to read simultaneously, and only lock them out when an update is needed (the updat...

I believe there's a way to find the kth largest element in an unsorted array of length n in O(n). Or perhaps it's "expected" O(n) or something. How can we do this? ...

...验总结第1条：慎重选择容器类型。标准STL序列容器：vector、string、deque和list。标准STL关联容器：set、multiset、map和multimap。非标准序列容... 第1条：慎重选择容器类型。 标准STL序列容器：vector、string、deque和list。 标准STL关联容...

I have a small piece of code that depends on many static libraries (a_1-a_n). I'd like to package up that code in a static library and make it available to other people. ...

...试工具（包括WIN95/98下）都是以汇编示人的，如果阁下对CRACK颇感兴趣……；二、汇编直接与硬件打交道，如果你想搞通程序在执行时在电脑中的来龙去脉，也就是搞清电脑每个组成部分究竟在干什么、究竟怎么干？一个真正的...

... tough to make a legend ( example_legend() , below), but I think it's better style to put labels right on the curves being plotted (as in example_inline() , below). This can be very fiddly, because I have to specify coordinates by hand, and, if I re-format the plot, I probably have to reposition th...

What is the best way to find records with duplicate values across multiple columns using Postgres, and Activerecord? 5 Answ...

Whenever I pull from my remote, I get the following error about compression. When I run the manual compression, I get the same: ...