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How can I get a precise time, for example in milliseconds in Objective-C?
...rom
NSDate *date = [NSDate date];
// do work...
// Find elapsed time and convert to milliseconds
// Use (-) modifier to conversion since receiver is earlier than now
double timePassed_ms = [date timeIntervalSinceNow] * -1000.0;
Documentation on timeIntervalSinceNow.
There are many other ways to...
Is it possible to delete an object's property in PHP?
...that has an integer key. e.g. $o=(object)array('a','b','c'); (You have to convert the object (back) to an array even to simply access such properties!)
– danorton
Mar 19 '14 at 22:09
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Remap values in pandas column with a dict
...e values (and also whether you want non-matches to keep their values or be converted to NaNs):
Exhaustive Mapping
In this case, the form is very simple:
df['col1'].map(di) # note: if the dictionary does not exhaustively map all
# entries then non-matched entries are...
CSS disable text selection
Currently, I have put this in the body tag to disable text selections:
9 Answers
9
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How can you encode a string to Base64 in JavaScript?
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You can use btoa() and atob() to convert to and from base64 encoding.
There appears to be some confusion in the comments regarding what these functions accept/return, so…
btoa() accepts a “string” where each character represents an 8-bit byte – if...
Equivalent of typedef in C#
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I couldn't convert typedef uint8 myuuid[16]; through "using" directive. using myuuid = Byte[16]; doesn't compile. using can be used just for creating type aliases. typedef seems to be much more flexible, since it can create an alias for...
sass --watch with automatic minify?
...ebStorm etc. Use the following settings in Settings > File Watchers.
Convert style.scss to style.css set the arguments
--no-cache --update $FileName$:$FileNameWithoutExtension$.css
and output paths to refresh
$FileNameWithoutExtension$.css
Convert style.scss to compressed style.min.css se...
How to round a number to n decimal places in Java
What I would like is a method to convert a double to a string which rounds using the half-up method - i.e. if the decimal to be rounded is 5, it always rounds up to the next number. This is the standard method of rounding most people expect in most situations.
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How can I set the default value for an HTML element?
I thought that adding a "value" attribute set on the <select> element below would cause the <option> containing my provided "value" to be selected by default:
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How does this code generate the map of India?
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The long string is simply a binary sequence converted to ASCII. The first for statement makes b start out at 10, and the [b+++21] after the string yields 31. Treating the string as an array, offset 31 is the start of the "real" data in the string (the second line in ...