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How do I get the number of elements in a list?
... xrange, dict, set, frozenset))
True
Do not use len to test for an empty or nonempty list
To test for a specific length, of course, simply test for equality:
if len(items) == required_length:
...
But there's a special case for testing for a zero length list or the inverse...
Restricting input to textbox: allowing only numbers and decimal point
...ber = new RegExp(/^\d*\.?\d*$/);
var lastValid = document.getElementById("test1").value;
function validateNumber(elem) {
if (validNumber.test(elem.value)) {
lastValid = elem.value;
} else {
elem.value = lastValid;
}
}
<textarea id="test1" oninput="validateNumber(this);" >...
Selenium wait until document is ready
...ething like 'find' to make it wait but I don't go that far. I just need to test that the page loads successfully and move on to next page to test.
...
How to split a String by space
...from rich text editors or web pages. They are not handled by .trim() which tests for characters to remove using c <= ' '; \s will not catch them either.
Instead, you can use \p{Blank} but you need to enable unicode character support as well which the regular split won't do. For example, this will...
Installing a dependency with Bower from URL and specify version
...to-swipe": "git@github.com:dimsemenov/PhotoSwipe.git#v3.0.x",
#bower 1.4 (tested with that version) can read repositorios with uri format
"photo-swipe": "git://github.com/dimsemenov/PhotoSwipe.git#v3.0.x",
}
}
Just remember bower also searches for released versions and tags so you...
How does Facebook Sharer select Images and other metadata when sharing my URL?
...l url
~~> Will scrape the page provided in the url value
~~> You can test test the values here: https://developers.facebook.com/tools/debug
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How do I prompt for Yes/No/Cancel input in a Linux shell script?
...cho Yes
else
echo No
fi
(Thanks to Adam Katz's comment: Replaced the test above with one that is more portable and avoids one fork:)
POSIX, but single key feature
But if you don't want the user to have to hit Return, you could write:
(Edited: As @JonathanLeffler rightly suggest, saving stty...
Testing whether a value is odd or even
...
I prefer using a bit test:
if(i & 1)
{
// ODD
}
else
{
// EVEN
}
This tests whether the first bit is on which signifies an odd number.
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...
Flatten nested dictionaries, compressing keys
...
Changed it to test for collections.MutableMapping to make it more generic. But for Python < 2.6, try..except is probably the best option.
– Imran
May 17 '11 at 7:55
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In Clojure 1.3, How to read and write a file
...ry stuff.
Number 1: how to read an entire file into memory.
(slurp "/tmp/test.txt")
Not recommended when it is a really big file.
Number 2: how to read a file line by line.
(use 'clojure.java.io)
(with-open [rdr (reader "/tmp/test.txt")]
(doseq [line (line-seq rdr)]
(println line)))
Th...