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@RequestParam in Spring MVC handling optional parameters
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172
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Running a Haskell program on the Android OS
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How you do it is by first getting a Haskell compiler which can target C with the android NDK which comes with a GCC port for ARM architectures. JHC can trivially do this with a very small inf style file which describes the platform (word size, c-compiler, etc) I've don...
How do you know when to use fold-left and when to use fold-right?
... I thought I saw a "Haskell" tag on this question, but it's not there. My comment doesn't really make that much sense if it's not Haskell...
– ephemient
Sep 19 '09 at 4:10
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How should I write tests for Forms in Django?
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Post an empty body to REST API via HttpClient
... It looks like this is only in .NET framework 4.5? msdn.microsoft.com/en-us/library/…
– dan
Dec 28 '11 at 3:54
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Regex: Specify “space or start of string” and “space or end of string”
...ch unicode words you have no choice but to use this instead: stackoverflow.com/a/6713327/1329367
– Mahn
Jan 27 '15 at 16:55
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How to install a plugin in Jenkins manually
...ns that are dependencies of the plugin being installed. As such I do not recommend it and I am down-voting for this reason. Please let me know if I am mistaken and I will undo my down-vote.
– Farrukh Najmi
Feb 17 '17 at 20:21
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What is the best regular expression to check if a string is a valid URL?
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I wrote my URL (actually IRI, internationalized) pattern to comply with RFC 3987 (http://www.faqs.org/rfcs/rfc3987.html). These are in PCRE syntax.
For absolute IRIs (internationalized):
/^[a-z](?:[-a-z0-9\+\.])*:(?:\/\/(?:(?:%[0-9a-f][0-9a-f]|[-a-z0-9\._~\x{A0}-\x{D7FF}\x{F900}-\x{...
How do you delete an ActiveRecord object?
...llow you to delete records
without a primary key
Note: from @hammady's comment, user.destroy won't work if User model has no primary key.
Note 2: From @pavel-chuchuva's comment, destroy_all with conditions and delete_all with conditions has been deprecated in Rails 5.1 - see guides.rubyonrails....
Manually adding a Userscript to Google Chrome
...alog:
Click Add.
Notes:
Scripts installed this way have limitations compared to a Greasemonkey (Firefox) script or a Tampermonkey script. See Cross-browser user-scripting, Chrome section.
Controlling the Script and name:
By default, Chrome installs scripts in the Extensions folder1, ful...