range

Converting array elements into range in php

由 大兔子大兔子 提交于 2019-11-30 13:38:22
I’m working on an array of numeric values. I have a array of numeric values as the following in PHP 11,12,15,16,17,18,22,23,24 And I’m trying to convert it into range for e.g in above case it would be: 11-12,15-18,22-24 I don’t have any idea how to convert it into range. You have to code it yourself ;-) The algorithm is quite simple: Iterate over the items. Remember the previous item and the start of the range. For each item (except the first one) check: If currentItem = prevItem + 1 then you haven't found a new range. Continue. Otherwise your range has ended. Write down the range. You have

Subtract Overlaps Between Two Ranges Without Sets

由 空扰寡人 提交于 2019-11-30 12:53:24
问题 NO SETS! I can't use Sets because: The ranges will be too long. They will take up too much memory The creation of the sets themselves will take too long. Using only the endpoints of the of the ranges, is there an optimal way to subtract two lists of ranges? Example: r1 = (1, 1000), (1100, 1200) r2 = (30, 50), (60, 200), (1150, 1300) r1 - r2 = (1, 29), (51, 59), (201, 1000), (1100, 1149) Other info: r2 does not have to overlap r1 r1 and r2 will not have pairs that overlap other pairs. For

Status of ranges for C++1z? [closed]

由 隐身守侯 提交于 2019-11-30 12:36:16
There is a study group on ranges in the C++ committee: but I have not followed the history of this study group and I am not sure of what kind of delivery is expected for C++1z (furthermore I do not use boost.range so I do not have a clear view of existing practices). Will we have: ranges as a pair of first/last iterators? union and other set operations on ranges(for example [v.begin()+5, v.begin()+7[ U [v.begin()+10, v.begin()+15[ U [v.begin()+21, v.begin()+42[ ), namely: union, intersection, disjoint union, complement? iterator filters (in order to execute a for_each where a condition is

What are the ranges of coordinates in the CIELAB color space?

由 ￡可爱￡侵袭症＋ 提交于 2019-11-30 12:04:51
问题 I have the following piece of code: public List<Tuple<double, double, double>> GetNormalizedPixels(Bitmap image) { System.Drawing.Imaging.BitmapData data = image.LockBits( new Rectangle(0, 0, image.Width, image.Height), System.Drawing.Imaging.ImageLockMode.ReadOnly, image.PixelFormat); int pixelSize = Image.GetPixelFormatSize(image.PixelFormat) / 8; var result = new List<Tuple<double, double, double>>(); unsafe { for (int y = 0; y < data.Height; ++y) { byte* row = (byte*)data.Scan0 + (y *

Is there a Python equivalent of range(n) for multidimensional ranges?

由 99封情书 提交于 2019-11-30 11:32:27
问题 On Python, range(3) will return [0,1,2]. Is there an equivalent for multidimensional ranges? range((3,2)) # [(0,0),(0,1),(1,0),(1,1),(2,0),(2,1)] So, for example, looping though the tiles of a rectangular area on a tile-based game could be written as: for x,y in range((3,2)): Note I'm not asking for an implementation. I would like to know if this is a recognized pattern and if there is a built-in function on Python or it's standard/common libraries. 回答1: In numpy, it's numpy.ndindex. Also

How to generate a random number between a and b in Ruby?

由 情到浓时终转凉″ 提交于 2019-11-30 10:17:14
问题 To generate a random number between 3 and 10, for example, I use: rand(8) + 3 Is there a nicer way to do this (something like rand(3, 10) ) ? 回答1: UPDATE: Ruby 1.9.3 Kernel#rand also accepts ranges rand(a..b) http://www.rubyinside.com/ruby-1-9-3-introduction-and-changes-5428.html Converting to array may be too expensive, and it's unnecessary. (a..b).to_a.sample Or [*a..b].sample Array#sample Standard in Ruby 1.8.7+. Note: was named #choice in 1.8.7 and renamed in later versions. But anyway,

How to get specific Range in Excel through COM Interop?

由 依然范特西╮ 提交于 2019-11-30 09:52:20
i have the following problem. I have to read an excel file through COM interop. I am new to programming with COM interop. I search for a specific string using this: this.sheet = (Excel.Worksheet)this.excelApp.Workbook.Sheets.Item[this.sheetname]; this.sheet.Activate(); Excel.Range firstRow = this.sheet.Range["A1", "XFD1"]; Excel.Range foundRange = firstRow.Find( this.StringISearch, Type.Missing, Type.Missing, Excel.XlLookAt.xlWhole, Excel.XlSearchOrder.xlByColumns, Excel.XlSearchDirection.xlNext, false, false, Type.Missing); No i want to use the foundRange as a starting point to get another

Alternative to CURLOPT_RANGE to grab a specific section

由 二次信任 提交于 2019-11-30 09:09:33
问题 I'm trying to use curl to fetch only a portion of a page so it will download less data thus making it quicker. I've been testing every possible option i can think of to no avail. The main one ive tried is defining a range: curl_setopt($ch, CURLOPT_RANGE, "0-4096"); The servers im trying this on are HTTP 1.1 but the setting has no effect as the entire page is pulled. Is there an alternative way to close the connection after X bytes in PHP or something along those lines? 回答1: You can use your

Subtracting ranges in VBA (Excel)

由 ぃ、小莉子 提交于 2019-11-30 08:17:48
问题 What I'm trying to do I'm trying to write a function to subtract Excel ranges . It should take two input parameters: range A and range B. It should return a range object consisting of cells that are part of range A and are not part of range B (as in set subtraction) What I've tried I've seen some examples on the web that use a temporary worksheet to do this (fast, but might introduce some issues with protected workbooks and such) and some other examples that go cell by cell through the first

Declaring an integer Range with step != 1 in Ruby

由 混江龙づ霸主 提交于 2019-11-30 08:06:25
问题 UPDATE 2 : For posterity, this is how I've settled on doing it (thanks to Jorg's input): 100.step(2, -2) do |x| # my code end (Obviously there are plenty of ways to do this; but it sounds like this is the most "Ruby" way to do it; and that's exactly what I was after.) UPDATE : OK, so what I was looking for was step : (2..100).step(2) do |x| # my code end But it turns out that I wasn't 100% forthcoming in my original question. I actually want to iterate over this range backwards. To my
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