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Hidden Features of JavaScript? [closed]
...cs snippet. ` var _gaq = _gaq || [];`; it prevents overzealous users from overwriting their own work.
– Yahel
Nov 11 '10 at 0:29
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Getting a timestamp for today at midnight?
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Also useful if you are using Carbon, which inherits from DateTime. Thus, you can also do new Carbon('today midnight') and then you can use all the Carbon stuff like ->subDays(6). See carbon.nesbot.com
– Christopher K.
Aug 28 '17 at 14:...
What is the purpose of Rank2Types?
...System F directly, because Haskell is designed to hide the details of that from you in the interest of simplicity.
But basically, the rough idea is that polymorphic types don't really have the a -> b form that they do in Haskell; in reality, they look like this, always with explicit quantifiers:...
The most efficient way to implement an integer based power function pow(int, int)
... no efficient algorithms to find this optimal sequence of multiplications. From Wikipedia:
The problem of finding the shortest addition chain cannot be solved by dynamic programming, because it does not satisfy the assumption of optimal substructure. That is, it is not sufficient to decompose th...
List directory tree structure in python?
...nswers above, but for python3, arguably readable and arguably extensible:
from pathlib import Path
class DisplayablePath(object):
display_filename_prefix_middle = '├──'
display_filename_prefix_last = '└──'
display_parent_prefix_middle = ' '
display_parent_prefix_last...
How do I auto-hide placeholder text upon focus using css or jquery?
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This makes it go but when I click away from the field it remains blank.
– LondonGuy
Mar 14 '12 at 17:41
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Clojure: reduce vs. apply
...which it would be silly to replicate in every function which might benefit from them in the vararg case. In such common cases, apply will just add a little overhead. (Note it's nothing to be really worried about.)
On the other hand, a complex function might take advantage of some optimisation oppor...
Disable Interpolation when Scaling a
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I’m (from the present future!) on Chrome 78. I’m seeing “image-rendering: pixelated;” working. It looks like this was added in 2015 to Chrome 41: developers.google.com/web/updates/2015/01/pixelated
– Mr...
Javascript fuzzy search that makes sense
...ight be better to try a different algorithm or combine/ weight the results from two algorithms.
It strikes me that exact or close matches to the "starting prefix" are something Levenshtein-Demerau gives no particular weight to -- but your apparent user expectations would.
I searched for "better th...
How can I add to List
...;? extends Number> foo3 means that the variable foo3 can hold any value from a family of types (rather than any value of a specific type). It means that any of these are legal assignments:
List<? extends Number> foo3 = new ArrayList<Number>; // Number "extends" Number
List<? exte...