大约有 45,000 项符合查询结果(耗时:0.0433秒) [XML]

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Using R to download zipped data file, extract, and import data

... See help(gzfile) -- I was thinking that the gzip protocol may now uncompress (stone old) .z files too now that the patent has long expired. It may not. Who uses .z anyways? The 1980s called, they want their compression back ;-) – Dirk Eddelbuettel ...
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Why can't yield return appear inside a try block with a catch?

...iables in the generated type, so you can freely move code to new methods Now transform: try { Console.WriteLine("a"); yield return 10; Console.WriteLine("b"); } catch (Something e) { Console.WriteLine("Catch block"); } Console.WriteLine("Post"); into (sort of pseudo-code): case...
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Why charset names are not constants?

...be present, so constants could have been made for those long ago. I don't know why they weren't. JDK 1.4 did a great thing by introducing the Charset type. At this point, they wouldn't have wanted to provide String constants anymore, since the goal is to get everyone using Charset instances. So why...
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How to split a long regular expression into multiple lines in JavaScript?

... function(reg){ return reg.source; } ).join(''), options); } And now let's rock var r = multilineRegExp([ /^foo/, // we can add comments too /(.*)/, /\bar$/ ]); Since it has a cost, try to build the real regex just once and then use that. ...
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TransformXml task could not be loaded from Microsoft.Web.Publishing.Tasks.dll

Has anyone seen this error and know how to fix it? 10 Answers 10 ...
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Conditional import of modules in Python

...user is on is Windows or Linux. I take the OS name as input from the user. Now, is it correct to do the following? 3 Answer...
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Ruby: Easiest Way to Filter Hash Keys?

... Symbols can be parsed with regular expressions nowadays IIRC. – Andrew Grimm Sep 15 '11 at 23:15 ...
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Standard deviation of a list

... function _sum rather than the built-in sum which I've used in its place. Now we have for example: >>> mean([1, 2, 3]) 2.0 >>> stddev([1, 2, 3]) # population standard deviation 0.816496580927726 >>> stddev([1, 2, 3], ddof=1) # sample standard deviation 0.1 ...
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Overcoming “Display forbidden by X-Frame-Options”

...ks well in FF/Chrome/Opera but doesn't work in IE/Edge though. Anyone who knows something which will? – Collector Aug 18 '15 at 4:49 7 ...
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Calculate age given the birth date in the format YYYYMMDD

...on _calculateAge(birthday) { // birthday is a date var ageDifMs = Date.now() - birthday.getTime(); var ageDate = new Date(ageDifMs); // miliseconds from epoch return Math.abs(ageDate.getUTCFullYear() - 1970); } Disclaimer: This also has precision issues, so this cannot be completely tr...