bluexuemei

正负抵消的删除

bluexuemei — Fri, 23 Jan 2015 15:59:03 +0800

arr=[['a',2],['a',2],['a',-2],['b',3],['b',-3],['c',4]]，要求将同种类中的正负抵消的项成对消除 result=[['a',2],['c',4]] 请指教！

16 进制转 GBK 不成功

bluexuemei — Mon, 19 Jan 2015 18:19:23 +0800

"AA3F3201861F0000D61F0000".scan(/..../).map{|x| x.to_i(16)}.pack("U*") 这个可以，但是 "AA3F3201861F0000D61F0000".scan(/..../).map{|x| x.to_i(16)}.pack("U*").encode('gbk') 不成功，怎么解决？

有人玩 ActiveScriptRuby 吗？

bluexuemei — Mon, 12 Jan 2015 13:03:23 +0800

ActiveScriptRuby 在 EXCEL 中可作为嵌入式脚本使用但是最新版本 Ruby-2.2.0 Microsoft Installer Package (2014-12-25 revision 49005) Set ojs = CreateObject("MSScriptControl.ScriptControl"): ojs.Language = "rubyscript"//创建失败，为什么？

怎么把 Double 转化为 Time 字符串

bluexuemei — Thu, 08 Jan 2015 12:30:17 +0800

如：0.5 怎么转化为“12:00:00”？？？

求多个相同大小的矩阵对应位置的最大值

bluexuemei — Thu, 08 Jan 2015 08:19:45 +0800

如题，怎么求多个相同大小的矩阵对应位置的最大值例如：a=[2 3 4 5;3 4 5 6;1 2 3 2;8 9 5 3] b=[1 1 1 5;4 5 2 3;6 5 6 3 ;7 4 9 7] 要求得到的结果矩阵是：c=[2 3 4 5;4 5 5 6; 6 5 6 3 ;8 9 9 7] 注意：要考虑效率问题，矩阵有可能很大，矩阵的个数不定

和为定值的随机数

bluexuemei — Sat, 03 Jan 2015 11:42:31 +0800

比方说 sum=80，我要生成 10 个在 4..13 之间的随机数，求高效算法。（可重复）注：是 10 个随机数的和为 80 my code:

nums = 10.times.collect {rand(4..13)} until 80== (nums || []).inject(:+)

但是如果随机数的个数很大的话，效率非常低

平均分配问题

bluexuemei — Sun, 21 Dec 2014 16:57:29 +0800

把一个任意整数平均分成若干份问题，比分说 9 分成 3 分，结果是 [3,3,3],10 分成 3 份，结果为 [3,3,4] 或者 [4,3,3] 或者 [3,4,3] 怎么设计算法才简洁？

ruby 遍历多叉树问题

bluexuemei — Thu, 04 Dec 2014 09:26:59 +0800

母键子键 A E B C B D B E E F G H J B J V J A 这是一个 BOM 的结构。现在想得到以下结果:（数据大概有 10 万) [[A,[E, F]], [B,[C, D, E, F]], [G,[H]], [J,[B, C, D, E, F, V, A, E, F]]]

安装 Nokogirl 的问题

bluexuemei — Sun, 02 Nov 2014 19:27:50 +0800

http://www.nokogiri.org/tutorials/installing_nokogiri.html Windows

Luckily for you, building on Windows is so difficult that we’ve done it for you: Nokogiri comes bundled with all the DLLs you need to be NOKOGIRIFIED! gem install nokogiri

我在 GitHub 下载的是一个 nokogiri 文件包，我应该把这个文件包放在什么地方，再运行 gem install nokogiri 呢？

RUBY 2.0 UTF-8 转 GBK 错误，怎么解决？

bluexuemei — Sun, 02 Nov 2014 10:21:28 +0800

有时候明明是 UTF-8 编码，可是 s.encode('gbk')，转码失败，怎么解决呢？ s='5233496214，鐖遍鏅敾，绂忓缓鑾嗙敯，缁樼敾鐖卞ソ鑰呫€傚井淇″彿锛？35421815,,,f,2085,1999,66,0,2014-07-26 17:51:14,-1,,1894' (utf-8 编码)

怎样一次性提取 XML 中带红色的所有数据

bluexuemei — Wed, 22 Oct 2014 23:56:13 +0800

<?xml version="1.0" encoding="UTF-8"?>
-<exposure_annotation_data type="exposure_annotation_data" version="6"> <image_number>1</image_number> <record_guid>5C0963EF-04D3-44BE-BC8D-AB0F39E0D408</record_guid> <software>COSa V4.4.1</software> <aperture description="F_8">1</aperture> <exposure_time unit="s">0.004000000000</exposure_time> -<exposure_annotation_info type="exposure_annotation_info"> <mid_exposure_correction unit="s">0.000000000000</mid_exposure_correction> +<fms_info type="fms_info"> -<gps_navigation_info type="gps_navigation_info" version="2"> <date unit="YYMMDD">141015</date> <time unit="hhmmss">062224</time> <latitude unit="WGS84">N38.246509</latitude> <longitude unit="WGS84">E107.388949</longitude> <altitude unit="m">3825.000000000000</altitude> <track_over_ground unit="degree">64.000000000000</track_over_ground> <position_solution>GPS</position_solution> </gps_navigation_info> </exposure_annotation_info> </exposure_annotation_data>

找零钱问题

bluexuemei — Wed, 15 Oct 2014 09:00:24 +0800

找零钱问题，现在要找 15 元钱，钱的面值分别为 1 元，2 元，5 元。要求优先找大面额的，再找小面额的。请求出面值所在数组的元素的序号 sum=15 array=[1,2,5,2,1,1,1, 5,2,1,1,1,1,1,1]

result_array=[2,7,1,3,0]

安装 Nokogirl 错误，急救！

bluexuemei — Tue, 07 Oct 2014 12:45:50 +0800

C:\ruby\Ruby-2.1\bin>gem install nokogiri --platform x86-mingw32 Temporarily enhancing PATH to include DevKit... Building native extensions. This could take a while... ERROR: Error installing nokogiri: ERROR: Failed to build gem native extension.

C:/ruby/Ruby-2.1/bin/ruby.exe extconf.rb Building nokogiri using packaged libraries. Building zlib-1.2.8 for nokogiri.

IMPORTANT! Nokogiri builds and uses a packaged version of zlib.

If this is a concern for you and you want to use the system library instead, abort this installation process and reinstall nokogiri as follows:

gem install nokogiri -- --use-system-libraries

If you are using Bundler, tell it to use the option:

bundle config build.nokogiri --use-system-libraries bundle install

Downloading zlib-1.2.8.tar.gz Downloading zlib-1.2.8.tar.gz ( 1%) Downloading zlib-1.2.8.tar.gz ( 4%) Downloading zlib-1.2.8.tar.gz ( 5%) Downloading zlib-1.2.8.tar.gz ( 6%) Downloading zlib-1.2.8.tar.gz ( 8%) Downloading zlib-1.2.8.tar.gz ( 10%) Downloading zlib-1.2.8.tar.gz ( 11%) Downloading zlib-1.2.8.tar.gz ( 12%) Downloading zlib-1.2.8.tar.gz ( 14%) Downloading zlib-1.2.8.tar.gz ( 16%) Downloading zlib-1.2.8.tar.gz ( 18%) Downloading zlib-1.2.8.tar.gz ( 19%) Downloading zlib-1.2.8.tar.gz ( 21%) Downloading zlib-1.2.8.tar.gz ( 23%) Downloading zlib-1.2.8.tar.gz ( 25%) Downloading zlib-1.2.8.tar.gz ( 27%) Downloading zlib-1.2.8.tar.gz ( 29%) Downloading zlib-1.2.8.tar.gz ( 30%) Downloading zlib-1.2.8.tar.gz ( 31%) Downloading zlib-1.2.8.tar.gz ( 32%) Downloading zlib-1.2.8.tar.gz ( 33%) Downloading zlib-1.2.8.tar.gz ( 34%) Downloading zlib-1.2.8.tar.gz ( 35%) Downloading zlib-1.2.8.tar.gz ( 37%) Downloading zlib-1.2.8.tar.gz ( 39%) Downloading zlib-1.2.8.tar.gz ( 41%) Downloading zlib-1.2.8.tar.gz ( 42%) Downloading zlib-1.2.8.tar.gz ( 43%) Downloading zlib-1.2.8.tar.gz ( 44%) Downloading zlib-1.2.8.tar.gz ( 45%) Downloading zlib-1.2.8.tar.gz ( 46%) Downloading zlib-1.2.8.tar.gz ( 48%) Downloading zlib-1.2.8.tar.gz ( 49%) Downloading zlib-1.2.8.tar.gz ( 51%) Downloading zlib-1.2.8.tar.gz ( 52%) Downloading zlib-1.2.8.tar.gz ( 54%) Downloading zlib-1.2.8.tar.gz ( 56%) Downloading zlib-1.2.8.tar.gz ( 57%) Downloading zlib-1.2.8.tar.gz ( 59%) Downloading zlib-1.2.8.tar.gz ( 61%) Downloading zlib-1.2.8.tar.gz ( 62%) Downloading zlib-1.2.8.tar.gz ( 63%) Downloading zlib-1.2.8.tar.gz ( 65%) Downloading zlib-1.2.8.tar.gz ( 67%) Downloading zlib-1.2.8.tar.gz ( 69%) Downloading zlib-1.2.8.tar.gz ( 71%) Downloading zlib-1.2.8.tar.gz ( 73%) Downloading zlib-1.2.8.tar.gz ( 75%) Downloading zlib-1.2.8.tar.gz ( 77%) Downloading zlib-1.2.8.tar.gz ( 78%) Downloading zlib-1.2.8.tar.gz ( 80%) Downloading zlib-1.2.8.tar.gz ( 82%) Downloading zlib-1.2.8.tar.gz ( 84%) Downloading zlib-1.2.8.tar.gz ( 86%) Downloading zlib-1.2.8.tar.gz ( 88%) Downloading zlib-1.2.8.tar.gz ( 89%) Downloading zlib-1.2.8.tar.gz ( 90%) Downloading zlib-1.2.8.tar.gz ( 91%) Downloading zlib-1.2.8.tar.gz ( 93%) Downloading zlib-1.2.8.tar.gz ( 95%) Downloading zlib-1.2.8.tar.gz ( 97%) Downloading zlib-1.2.8.tar.gz ( 99%) Downloading zlib-1.2.8.tar.gz (100%) Extracting zlib-1.2.8.tar.gz into tmp/i686-mswin32_100/ports/zlib/1.2.8... OK Running 'compile' for zlib 1.2.8... ERROR, review 'tmp/i686-mswin32_100/ports/ ib/1.2.8/compile.log' to see what happened. *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options. Provided configuration options: --with-opt-dir --without-opt-dir --with-opt-include --without-opt-include=${opt-dir}/include --with-opt-lib --without-opt-lib=${opt-dir}/lib --with-make-prog --srcdir=. --curdir --ruby=C:/ruby/Ruby-2.1/bin/ruby --help --clean --use-system-libraries --enable-static --disable-static --with-zlib-dir --without-zlib-dir --with-zlib-include --without-zlib-include=${zlib-dir}/inclu --with-zlib-lib --without-zlib-lib=${zlib-dir}/lib --enable-cross-build --disable-cross-build C:/ruby/Ruby-2.1/lib/ruby/gems/2.1.0/gems/mini_portile-0.6.0/lib/mini_portile.rb :279:in block in execute': Failed to complete compile task (RuntimeError) from C:/ruby/Ruby-2.1/lib/ruby/gems/2.1.0/gems/mini_portile-0.6.0/lib/mi ni_portile.rb:271:inchdir' from C:/ruby/Ruby-2.1/lib/ruby/gems/2.1.0/gems/mini_portile-0.6.0/lib/mi ni_portile.rb:271:in execute' from extconf.rb:402:incompile' from C:/ruby/Ruby-2.1/lib/ruby/gems/2.1.0/gems/mini_portile-0.6.0/lib/mi ni_portile.rb:110:in cook' from extconf.rb:253:inblock in process_recipe' from extconf.rb:154:in tap' from extconf.rb:154:inprocess_recipe' from extconf.rb:377:in `

extconf failed, exit code 1

Gem files will remain installed in C:/ruby/Ruby-2.1/lib/ruby/gems/2.1.0/gems/nok ogiri-1.6.3.1 for inspection. Results logged to C:/ruby/Ruby-2.1/lib/ruby/gems/2.1.0/extensions/x86-mswin32-10 0/2.1.0/nokogiri-1.6.3.1/gem_make.out

乱码，怎么解决，请大神帮帮忙！

bluexuemei — Thu, 02 Oct 2014 19:28:47 +0800

require 'net/http' url=%Q(http://blog.sina.com.cn/1789468892) res =Net::HTTP.get_response(URI.parse(url)).body.match(/

(.+?)<\/title>/)[1] res.force_encoding('gbk') 输出结果："灏忕簿鐏典滑_鏂版氮鍗氬�" 乱码，怎么解决，请大神帮帮忙！

按条件重排数组元素

bluexuemei — Sun, 06 Jul 2014 12:33:01 +0800

arr=["Beijing","Beijing","Beijing","Tokyo","Tokyo","Tokyo","New York","New York","Paris"] 这个数组共 9 个元素，我想把它分成 3 个区域：0-2,3-5,6-8。我想把它按条件重排，要求每个区域中的三个元素各不相同，而且这 3 个元素随机排列，得到的结果如下所示： result_arr=["Tokyo"，"Beijing"，"New York"，"Paris"，"Beijing"，"Tokyo"，"Beijing"，"New York"，"Tokyo"]。怎么解决比较方便？

在 windows 上 pry 默认没有打开自动缩进和颜色功能.，怎么配置？

bluexuemei — Thu, 26 Jun 2014 18:42:49 +0800

在 windows 上 pry 默认没有打开自动缩进和颜色功能.，怎么配置？

ruby 2.0 的 irb 删除字符后显示异常

bluexuemei — Wed, 25 Jun 2014 11:17:24 +0800

ruby 2.0 的 irb（windows 环境) 没有以前的好用，删除字符后显示异常，怎么解决？

ASCII-8BIT 怎么转换为 GBK?

bluexuemei — Sat, 21 Jun 2014 12:31:51 +0800

ASCII-8BIT 怎么转换为 GBK?

带 BOM 的 UTF-8 转换为 GBK

bluexuemei — Fri, 20 Jun 2014 11:43:34 +0800

无 BOM 的 UTF-8 转换为 GBK：file.open(f,"r:utf-8:gbk")
带 BOM 的 UTF-8 转换为 GBK：file.open(f,"r:bom|utf-8:gbk")
但是如果一个文件夹中有的是带 BOM 的，有些是不带 BOM 的 utf-8，怎么判断并读取？？？

谷歌的网站很难登陆

bluexuemei — Wed, 04 Jun 2014 08:41:42 +0800

最近谷歌的网站很难登陆不知道怎么回事？ stackoverflow 登陆也特别慢，怎么回事？Stack Overflow requires external JavaScript from another domain, which is blocked or failed to load???