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jQuery how to find an element based on a data-attribute value?
...value of current into an Attribute Equals selector:
$("ul").find(`[data-slide='${current}']`)
For older JavaScript environments (ES5 and earlier):
$("ul").find("[data-slide='" + current + "']");
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Can I use an OR in regex without capturing what's enclosed?
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Depending on the regular expression implementation you can use so called non-capturing groups with the syntax (?:…):
((?:a|b)c)
Here (?:a|b) is a group but you cannot reference its match. So you can only reference the match of ((?:a|b)c) that is either ac or bc.
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:not(:empty) CSS selector is not working?
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Being a void element, an <input> element is considered empty by the HTML definition of "empty", since the content model of all void elements is always empty. So they will always match the :empty pseudo-class, whether or not they ...
Using FileSystemWatcher to monitor a directory
...arbage collection. I think EnableRaisingEvents has, what I might favorably call, a special behavior in this case.
– Matias Grioni
Feb 27 '19 at 0:55
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Open a file from Cygwin
...e, you can just use start <something> in a Windows cmd console. Specically, you can use start . to open current path in File Explorer.
– Robert
Dec 9 '17 at 7:53
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Printing all global variables/local variables?
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In case you want to see the local variables of a calling function use select-frame before info locals
E.g.:
(gdb) bt
#0 0xfec3c0b5 in _lwp_kill () from /lib/libc.so.1
#1 0xfec36f39 in thr_kill () from /lib/libc.so.1
#2 0xfebe3603 in raise () from /lib/libc.so.1
#3 0xf...
ValueError: math domain error
...oing a log of a number that is less than or equal to zero. That's mathematically undefined, so Python's log function raises an exception. Here's an example:
>>> from math import log
>>> log(-1)
Traceback (most recent call last):
File "<pyshell#59>", line 1, in <module&g...
How can I see the specific value of the sql_mode?
...ier the former is correct. If @@sql_mode is empty (the "blank" mode as you call it), then no sql_mode is set. I won't comment on the default sql_mode because that depends which version of MySQL you are running.
– Ike Walker
Apr 25 '16 at 13:27
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Fastest way to determine if an integer's square root is an integer
...about 1/8 of the residues mod 255 are squares. However, in my experience, calling the modulo operator (%) costs more than the benefit one gets, so I use bit tricks involving 255 = 2^8-1 to compute the residue. (For better or worse, I am not using the trick of reading individual bytes out of a word...
Redis key naming conventions?
...s website is stated: Try to stick with a schema. For instance "object-type:id:field" can be
a nice idea, like in "user:1000:password". I like to use dots for
multi-words fields, like in "comment:1234:reply.to".
Are you able to query for just the beginning of the key to return all
users?
If y...