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In Objective-C, how do I test the object type?
...nt to test to see if it is an NSString, the code would be:
[myObject isKindOfClass:[NSString class]]
Likewise, if you wanted to test myObject for a UIImageView:
[myObject isKindOfClass:[UIImageView class]]
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Why are functions in Ocaml/F# not recursive by default?
... through the decades to the modern variants. So this is just legacy but it does affect idioms in these languages.
Functions are not recursive by default in the French CAML family of languages (including OCaml). This choice makes it easy to supercede function (and variable) definitions using let in ...
How do I get the find command to print out the file size with the file name?
...
Your answer does not exclude directories, so you will end up running ls on directories as well, which clearly is not the right thing to do.
– Faheem Mitha
Nov 7 '14 at 10:08
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How do I get the last inserted ID of a MySQL table in PHP?
...requently inserted. I need to get the very last ID of the table. How can I do this?
21 Answers
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How do I check if an array includes a value in JavaScript?
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Modern browsers have Array#includes, which does exactly that and is widely supported by everyone except IE:
console.log(['joe', 'jane', 'mary'].includes('jane')); //true
You can also use Array#indexOf, which is less direct, but doesn't require polyfills for ...
How can one change the timestamp of an old commit in Git?
...ge the dates of commit 119f9ecf58069b265ab22f1f97d2b648faf932e0, you could do so with something like this:
git filter-branch --env-filter \
'if [ $GIT_COMMIT = 119f9ecf58069b265ab22f1f97d2b648faf932e0 ]
then
export GIT_AUTHOR_DATE="Fri Jan 2 21:38:53 2009 -0800"
export GI...
How to enable PHP's openssl extension to install Composer?
...m getting a warning message for not enabling openssl which I had already done in WAMP.
18 Answers
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How to handle change of checkbox using jQuery?
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Use :checkbox selector:
$(':checkbox').change(function() {
// do stuff here. It will fire on any checkbox change
});
Code: http://jsfiddle.net/s6fe9/
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Fully custom validation error message with Rails
...ying to get an error message like "The song field can't be empty" on save. Doing the following:
17 Answers
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How do I send an HTML email?
...displays in plain text. I want the content to be able to display html. How do I do it? Here is roughly what I have:
10 Answ...