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Unable to install gem - Failed to build gem native extension - cannot load such file — mkmf (LoadErr
...uby1.9.1-dev
Should fix your problem.
Still not working? Try the following after installing ruby-dev:
sudo apt-get install make
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How to sort a list/tuple of lists/tuples by the element at a given index?
... itemgetter instance does not. tl;dr: Always use itemgetter, because speed wins.
– Cecil Curry
Nov 29 '16 at 6:02
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汇编语言超浓缩教程（汇编入门必备） - C/C++ - 清泛网 - 专注C/C++及内核技术
...汇编语言兼容性最好，故几乎所有跟踪、调试工具（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...
How to split long commands over multiple lines in PowerShell
How do you take a command like the following in PowerShell and split it across multiple lines?
8 Answers
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Join vs. sub-query
...version-specific and query-specific.
Historically, explicit joins usually win, hence the established wisdom that joins are better, but optimisers are getting better all the time, and so I prefer to write queries first in a logically coherent way, and then restructure if performance constraints warr...
How can I open a link in a new window?
...or a specific link, inside that I want to do something similar to the following:
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How to get the first line of a file in a bash script?
...thod doesn't work as written, because read doesn't print anything (so line winds up blank), and also executes in a subshell (so FIRSTLINE gets set to the first line, but only in the subshell, so it's not available afterward). Solution: just use read -r line <filename
– Gord...
Python Create unix timestamp five minutes in the future
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It's also more portable than %s flag to strftime (which doesn't work on Windows).
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How do I make a WinForms app go Full Screen
I have a WinForms app that I am trying to make full screen (somewhat like what VS does in full screen mode).
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How to force LINQ Sum() to return 0 while source collection is empty
Basically when I do the following query, if no leads were matched the following query throws an exception. In that case I'd prefer to have the sum equalize 0 rather than an exception being thrown.
Would this be possible in the query itself - I mean rather than storing the query and checking query.A...