[Solved] Single line for loop over iterator with an “if” filter?

[ad_1] No, there is no shorter way. Usually, you will even break it into two lines : important_airports = (airport for airport in airports if airport.is_important) for airport in important_airports: # do stuff This is more flexible, easier to read and still don’t consume much memory. 3 [ad_2] solved Single line for loop over iterator … Read more

[Solved] Background color change from dropdown using javascript

[ad_1] Here is a solution using jQuery $(document).ready(function () { //$(“#background”).css(“background-color”,$.cookie(“defaultColor”)); $(“#background-change”).change(function (event) { var color = $(this).val(); $(“#background”).css(“background-color”,color); //$.cookie(“defaultColor”,color); }); }); The code will change the background based on the selected value in the dropdown list. To set and retrieve cookie using jQuery, you have to use the jQuery Cookie Plugin Use this code … Read more

[Solved] R computing not so fast

[ad_1] This isn’t quite right, but maybe gives some indication of how to make this type of operation faster. Here’s the data url <- “http://pastebin.com/raw.php?i=hsGACr2L” dfi <- read.csv(url) I calculate the product and cumulative sum of the product of price and volume. The calculation is vectorized so fast. pv <- with(dfi, Price * Volume) cpv … Read more

[Solved] not scraping website with PHP [closed]

[ad_1] The reason why this isn’t working is because the actual website got a lot more between “Summary:” and the “<span class…” What you could try (that seems to work) is to change it into the simpler form: $contents=file_get_contents(“http://www.weather-forecast.com/locations/San-Francisco/forecasts/latest”); preg_match(‘/<span class=”phrase”>(.*?)<\/s/’, $contents,$matches); print_r($matches[0]); This will pick out more matches, but since we’re only interested in … Read more

[Solved] ArrayIndexOutOfBoundsException in ten’s complement arithmetic implementation

[ad_1] Okay, after so much discussion and so many issues with your code I have totally revised your original code because you said you wanted to learn more. Among other improvements I have done the following changes: Meaninfgul class name Meaningful method and parameter names Convert repeated and often used constants like 50 and the … Read more

[Solved] sql to linq conversion for this table [closed]

[ad_1] You can do something like this:- var output= countries.GroupBy(c => new { c.State, c.City }) .Select(a => new { City = a.Key.City, State = a.Key.State, Zip = a.Max(z => z.Zip) }).OrderBy(m => m.City); 1 [ad_2] solved sql to linq conversion for this table [closed]

[Solved] The meaning of ua and mw in JavaScript

[ad_1] In a MediaWiki context, mw is a global object containing a number of Javascript methods and properties, that other javascript modules can make use of. If, for instance, you are adding Javascript code to MediaWiki:Common.js, you will always be able to access the mw variable. (Read more about MediaWiki JS modules here.) The mw.config … Read more

[Solved] How to find data in string? [closed]

[ad_1] Use re.findall. The regex: r’^(.*\S)\s+id:\s*(\d+)\s+type:\s*(.+)’ means: ^ : start of the string..* :any character, repeated 0 or more times.\S : non-whitespace character.\s+ : whitespace character, repeated 1 or more times.\d+ : any digit, repeated 1 or more times.(PATTERN) : capture the patterns and return it. Here we capture 3 patterns. import re string = … Read more