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Simple calculations for working with lat/lon and km distance?
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If you're using Java, Javascript or PHP, then there's a library that will do these calculations exactly, using some amusingly complicated (but still fast) trigonometry:
http://www.jstott.me.uk/jcoord/
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Convert Data URI to File then append to FormData
... array.length=binary.length; ... array[i]=bina... etc. So the array is pre-allocated. It saves a push() having to extend the array each iteration, and we're processing possibly millions of items (=bytes) here, so it matters.
– DDS
Mar 14 '13 at 20:28
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HTML input - name vs. id [duplicate]
... & checkboxes
Can not be referenced in URL, although as JavaScript and PHP can see the URL there are workarounds
Is referenced in JS with getElementsByName()
Shares the same namespace as the id attribute
Must begin with a letter
According to specs is case sensitive, but most modern browsers don'...
self referential struct definition?
...ell *last;
/* Construct linked list, 100 down to 80. */
first = malloc (sizeof (tCell));
last = first;
first->cellSeq = 100;
first->next = NULL;
for (i = 0; i < 20; i++) {
curr = malloc (sizeof (tCell));
curr->cellSeq = last->cellSeq - 1;
...
Why are exclamation marks used in Ruby methods?
... convention, the names of procedures
that store values into previously
allocated locations (see section 3.4)
usually end in ``!''. Such procedures
are called mutation procedures. By
convention, the value returned by a
mutation procedure is unspecified.
...
difference between variables inside and outside of __init__()
...s if you don't create them in __init__().
– too much php
Oct 8 '09 at 11:43
3
@too much php: All ...
What's the difference between “Request Payload” vs “Form Data” as seen in Chrome dev tools Network t
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PHP is evil of course. The popularity of application/x-www-form-urlencoded is defined by the popularity of PHP.
– Brian Cannard
Apr 28 '16 at 10:17
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When to encode space to plus (+) or %20?
...ponent() does in JavaScript. Unfortunately it's not what urlencode does in PHP (rawurlencode is safer).
See Also
HTML 4.01 Specification application/x-www-form-urlencoded
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Return multiple values in JavaScript?
...recent versions of Chrome and Firefox.
But as making a new object, memory allocation (and eventual gc load) are involved here, don't expect much performance from it. JavaScript is not best language for developing highly optimal things anyways but if that is needed, you can consider putting your res...
Remove characters from C# string
...iency? Won't regular expressions be more efficient in sense of new strings allocations?
– Marek
Nov 19 '18 at 9:38
2
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