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What are the differences between Perl, Python, AWK and sed? [closed]
...e as Perl.
OK - when to use each?
Sed - when you need to do simple text transforms on files.
Awk - when you only need simple formatting and summarisation or transformation of data.
Perl - for almost any task, but especially when the task needs complex regular expressions.
Python - for the same ta...
Simple explanation of MapReduce?
...the way down to the basics for Map and Reduce.
Map is a function which "transforms" items in some kind of list to another kind of item and put them back in the same kind of list.
suppose I have a list of numbers: [1,2,3] and I want to double every number, in this case, the function to "double ev...
There is no ViewData item of type 'IEnumerable' that has the key 'xxx'
...do if the list is null! can you suggest something,
– transformer
Mar 15 '17 at 5:05
4
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Prevent “overscrolling” of web page
...tion: none; /* prevent scrolling */
}
body.refreshing .refresher {
transform: translate3d(0,150%,0) scale(1);
z-index: 1;
}
.refresher {
--refresh-width: 55px;
pointer-events: none;
width: var(--refresh-width);
height: var(--refresh-width);
border-radius: 50%;
...
What are free monads?
...d homomorphisms to a category of endofunctors where the arrows are natural transformations, and we look for a functor that is left adjoint to that.
So, how does this relate to the notion of a free monad as it is usually used?
Knowing that something is a free monad, Free f, tells you that giving a...
Force DOM redraw/refresh on Chrome/Mac
...eZ fixed the issue without needing extra javascript.
.willnotrender {
transform: translateZ(0);
}
As these painting issues show up mostly in Webkit/Blink, and this fix mostly targets Webkit/Blink, it's preferable in some cases. Especially since many JavaScript solutions cause a reflow and r...
Mapping over values in a python dictionary
...ctionary can be used to store the original data as if it was a dict, while transforming any data on request with a callback.
Of course, feel free to name the class and the function the way you want (the name chosen in this answer is inspired by PHP's array_walk() function).
Note: Neither the try-e...
Convert string to title case with JavaScript
...
Try to apply the text-transform CSS style to your controls.
eg: (text-transform: capitalize);
Only use a JS approach when absolutely necessary.
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Should I use a data.frame or a matrix?
...s you use some data analysis package that would require otherwise constant transforming from matrices to DFs and back, or you do not do any intensive calculations yourself and only use standard packages (many of them actually internally transform a DF to a matrix, do their job, and then transform th...
jQuery SVG vs. Raphael [closed]
... layers of Coordinate Transfomations. Instead there is only one coordinate transform available.
If your design depends on nested coordinate transforms, Raphael is not for you.
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