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How to escape special characters in building a JSON string?
...d Aug 11 '17 at 10:46
informatik01
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answered Sep 11 '14 at 21:25
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Filter rows which contain a certain string
...35 19.90 1 1 4 1 Toyota Corolla
4 21.5 4 120.1 97 3.70 2.465 20.01 1 0 3 1 Toyota Corona
If you would like to do it the other way round, namely excluding Toyota and Mazda cars, the filter command looks like this:
dplyr::filter(mtcars, !grepl('Toyota|Mazda', type))
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How does Facebook Sharer select Images and other metadata when sharing my URL?
...e, use the Facebook Url Debugger / Linter Tool that they launched in June 2010 to refresh the cache and troubleshoot any meta tag issues on your page.
Also, the images on the page must be publicly accessible to the Facebook crawler. You should specify absolute url's like http://example.com/youri...
C# code to validate email address
...turns true.
– urig
Jun 11 '17 at 10:01
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Change R default library path using .libPaths in Rprofile.site fails to work
...s RStudio material at: https://support.rstudio.com/hc/en-us/articles/200549016-Customizing-RStudio
In your case it appears that RStudio is not respecting the Rprofile.site settings or perhaps is overriding them by reading an .Rprofile setting from one of the RStudio defaults. It should also be ment...
Can two different strings generate the same MD5 hash code?
...ile there are no such known attacks (preimage attacks) against MD5 (as of 2011), it could become possible by extending the current research on collision attacks.
If these turn out to be a problem, I suggest looking at the SHA-2 series of hash functions (SHA-256, SHA-384 and SHA-512). The downside i...
How to calculate date difference in JavaScript?
...t that date's year(diff from 1970), month, day etc.
var date1 = new Date(2010, 6, 17);
var date2 = new Date(2013, 12, 18);
var diff = new Date(date2.getTime() - date1.getTime());
// diff is: Thu Jul 05 1973 04:00:00 GMT+0300 (EEST)
console.log(diff.getUTCFullYear() - 1970); // Gives difference as ...
ng-repeat finish event
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edited Jul 31 '16 at 8:01
Muhammad Omar ElShourbagy
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Programmatically stop execution of python script? [duplicate]
...ation.
– CodeNinja
Aug 23 '18 at 12:01
stackoverflow.com/questions/13992662/… - It's really not a big deal. Quite po...
Delete a line in Eclipse
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answered Feb 26 '09 at 16:01
Joshua McKinnonJoshua McKinnon
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