extract | 易学教程

Extract numbers from a string using javascript

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问题 I'd like to extract the numbers from the following string via javascript/jquery: "ch2sl4" problem is that the string could also look like this: "ch10sl4" or this "ch2sl10" I'd like to store the 2 numbers in 2 variables. Is there any way to use match so it extracts the numbers before and after "sl" ? Would match even be the correct function to do the extraction? Thx 回答1: Yes, match is the way to go: var matches = str.match(/(\d+)sl(\d+)/); var number1 = Number(matches[1]); var number2 = Number

C# regex pattern to extract urls from given string - not full html urls but bare links as well

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I need a regex which will do the following Extract all strings which starts with http:// Extract all strings which starts with www. So i need to extract these 2. For example there is this given string text below house home go www.monstermmorpg.com nice hospital http://www.monstermmorpg.com this is incorrect url http://www.monstermmorpg.commerged continue So from the given above string i will get www.monstermmorpg.com http://www.monstermmorpg.com http://www.monstermmorpg.commerged Looking for regex or another way. Thank you. C# 4.0 You can write some pretty simple regular expressions to handle

How to securely create PHP variables with extract

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问题 In my previous post i ask how to create variables from an array ( PHP Variables made with foreach ) i got several answers and i was testing extract() but i have seen several against it for security reasons. Now my question here is how can i use extract in a secure way from a $_POST that has an array that was made using jquery serialized. With secure i mean that if a user inputs the wrong data, the secure way can take care of that with no problems. THe PHP Site has a small warning in the

Extract string before “|” [duplicate]

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Extract a ZIP file programmatically by DotNetZip library?

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问题 I have a function that get a ZIP file and extract it to a directory (I use DotNetZip library.) public void ExtractFileToDirectory(string zipFileName, string outputDirectory) { ZipFile zip = ZipFile.Read(zipFileName); Directory.CreateDirectory(outputDirectory); zip.ExtractAll(outputDirectory,ExtractExistingFileAction.OverwriteSilently); } My ZIP file contains multiple files and directories. But I want to extract only some of these files, not all of them. How can I make this work? 回答1: You need

Get min and max value in PHP Array

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问题 I have an array like this: array (0 => array ( 'id' => '20110209172713', 'Date' => '2011-02-09', 'Weight' => '200', ), 1 => array ( 'id' => '20110209172747', 'Date' => '2011-02-09', 'Weight' => '180', ), 2 => array ( 'id' => '20110209172827', 'Date' => '2011-02-09', 'Weight' => '175', ), 3 => array ( 'id' => '20110211204433', 'Date' => '2011-02-11', 'Weight' => '195', ), ) I need to extract minimal and maximal Weight values. In this example $min_value = 175 $max_value = 200 Any help on how to

How to extract values from rasterstack with xy coordinates?

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问题 I have a rasterstack (5 raster layers) that actually is a time series raster. r <- raster(nrow=20, ncol=200) s <- stack( sapply(1:5, function(i) setValues(r, rnorm(ncell(r), i, 3) )) ) s class : RasterStack dimensions : 20, 200, 4000, 5 (nrow, ncol, ncell, nlayers) resolution : 1.8, 9 (x, y) extent : -180, 180, -90, 90 (xmin, xmax, ymin, ymax) coord. ref. : +proj=longlat +datum=WGS84 +ellps=WGS84 +towgs84=0,0,0 names : layer.1, layer.2, layer.3, layer.4, layer.5 min values : -9.012146, -9

Extract standard errors from glm

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问题 I did a glm and I just want to extract the standard errors of each coefficient. I saw on the internet the function se.coef() but it doesn't work, it returns "Error: could not find function "se.coef"" . 回答1: The information you're after is stored in the coefficients object returned by summary() . You can extract it thusly: summary(glm.D93)$coefficients[, 2] #Example from ?glm counts <- c(18,17,15,20,10,20,25,13,12) outcome <- gl(3,1,9) treatment <- gl(3,3) print(d.AD <- data.frame(treatment,

How do you extract a url from a string using python?

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For example: string = "This is a link http://www.google.com" How could I extract 'http://www.google.com' ? (Each link will be of the same format i.e 'http://') There may be few ways to do this but the cleanest would be to use regex >>> myString = "This is a link http://www.google.com" >>> print re.search("(?P<url>https?://[^\s]+)", myString).group("url") http://www.google.com If there can be multiple links you can use something similar to below >>> myString = "These are the links http://www.google.com and http://stackoverflow.com/questions/839994/extracting-a-url-in-python" >>> print re

how can we extract text from pdf using itextsharp with spaces?

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问题 I am using below method to extract pdf text line by line. But problem that, it is not reading spaces between words and figures. what could be the solution for this ?? I just want to create a list of string, each string in list object has a text line from pdf as it is in pdf including spaces. public void readtextlinebyline(string filename) { List<string> strlist = new List<string>(); PdfReader reader = new PdfReader(filename); string text = string.Empty; for (int page = 1; page <= 1; page++) {