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What does [:] mean?
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110
It is an example of slice notation, and what it does depends on the type of population. If po...
Base64: What is the worst possible increase in space usage?
...ore converting,, say it wanted to always permit the final byte array to be 16KB. How big could a 16KB byte array possibly become when converted to a Base64 string (assuming one byte per character)?
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How do you specify the Java compiler version in a pom.xml file?
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312
<project>
[...]
<build>
[...]
<plugins>
<plugin>
...
Generate a random double in a range
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241
To generate a random value between rangeMin and rangeMax:
Random r = new Random();
double rando...
Fastest way to iterate over all the chars in a String
...e now Java will store strings as byte[] by default.
SECOND UPDATE: As of 2016-10-25, on my AMDx64 8core and source 1.8, there is no difference between using 'charAt' and field access. It appears that the jvm is sufficiently optimized to inline and streamline any 'string.charAt(n)' calls.
THIRD UPDAT...
Is gcc std::unordered_map implementation slow? If so - why?
...!!
With gcc-4.7
inserts: 37728
get : 2985
With gcc-4.6
inserts: 2531
get : 1565
So std::unordered_map in gcc-4.7 is broken (or my installation, which is an installation of gcc-4.7.0 on Ubuntu - and another installation which is gcc 4.7.1 on debian testing).
I will submit a bug report.....
Re-raise exception with a different type and message, preserving existing information
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Python 3 introduced exception chaining (as described in PEP 3134). This allows, when raising an exception, to cite an existing exception as the “cause”:
try:
frobnicate()
except KeyError as exc:
raise ValueError("Bad grape") from exc
The caught exception (exc, a KeyError) ...
How can I detect whether an iframe is loaded?
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185
You may try this (using jQuery)
$(function(){
$('#MainPopupIframe').load(function(){...
Difference between os.getenv and os.environ.get
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edited Jan 13 '17 at 3:53
Tushar
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