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Advantages of stateless programming?
I've recently been learning about functional programming (specifically Haskell, but I've gone through tutorials on Lisp and Erlang as well). While I found the concepts very enlightening, I still don't see the practical side of the "no side effects" concept. What are the practical advantages of it? ...
Safe integer parsing in Ruby
I have a string, say '123' , and I want to convert it to the integer 123 .
8 Answers
...
How can I make Bootstrap columns all the same height?
...yellow">
catz
<img width="100" height="100" src="https://placekitten.com/100/100/">
</div>
<div class="col-md-4" style="background-color: green">
some more content
</div>
</div>
</div>
Solution 1 using...
How to sort a dataframe by multiple column(s)
...
You can use the order() function directly without resorting to add-on tools -- see this simpler answer which uses a trick right from the top of the example(order) code:
R> dd[with(dd, order(-z, b)), ]
b x y z
4 Low C 9 2
2 Med D 3 1
1 Hi A ...
Best ways to teach a beginner to program? [closed]
... helps.
1) FizzBuzz. Start with command line programs. You can write some fun games, or tools, very quickly, and you learn all of the language features very quickly without having to learn the GUI tools first. These early apps should be simple enough that you won't need to use any real debugging to...
Should I use PATCH or PUT in my REST API?
...only the activation field(partial modification)
according to the RFC5789 (https://tools.ietf.org/html/rfc5789)
The existing HTTP PUT method only allows a complete replacement of
a document. This proposal adds a new HTTP method, PATCH, to modify
an existing HTTP resource.
Also, in...
Oracle 11.2.0.4 RAC FOR redhat 6.4 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...这个字体
创建自己的字体文件夹
mkdir -p /usr/share/fonts/zh_CN/TrueType
或者使用XFTP 上传到该目录下
cp zysong.ttf /usr/share/fonts/zh_CN/TrueType/
执行下面三条命令
mkfontscale
mkfontdir
fc-cache -fv
OK 显示正常
然后...
Two-dimensional array in Swift
...r swift 4.1 you can use this struct so easily to create a 2D array:
Link: https://developer.apple.com/library/content/documentation/Swift/Conceptual/Swift_Programming_Language/Subscripts.html
Code sample:
struct Matrix {
let rows: Int, columns: Int
var grid: [Double]
init(rows: Int, c...
Capturing Groups From a Grep RegEx
...he following examples and more, which may not be what you're looking for:
123_abc_d4e5
xyz123_abc_d4e5
123_abc_d4e5.xyz
xyz123_abc_d4e5.xyz
To eliminate the second and fourth examples, make your regex like this:
^[0-9]+_([a-z]+)_[0-9a-z]*
which says the string must start with one or more digit...
Using a ListAdapter to fill a LinearLayout inside a ScrollView layout
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...