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What is better, adjacency lists or adjacency matrices for graph problems in C++?
... a list takes up more memory than a matrix:
8e > n2/8 when d > 1/64
So with these numbers (still 32-bit specific) the breakpoint lands at 1/64.
If the density (e/n2) is bigger than 1/64, then a matrix is preferable if you want to save memory.
You can read about this at wikipedia (artic...
How do you do relative time in Rails?
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Andrew Marshall
87.3k1818 gold badges202202 silver badges204204 bronze badges
answered Oct 12 '08 at 19:18
Ben Scofie...
What's the difference between unit tests and integration tests? [duplicate]
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600
A unit test is a test written by the programmer to verify that a relatively small piece of cod...
How to stop Visual Studio from “always” checking out solution files?
...swered Aug 2 '10 at 14:11
user408720user408720
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Eclipse executable launcher error: Unable to locate companion shared library
....jar
--launcher.library
plugins/org.eclipse.equinox.launcher.gtk.linux.x86_64_1.1.200.v20120913-144807
For some twisted reason jars have version in their name - so if you upgrade/have two different version of eclipse( while eclipse.ini is either linked or provided as system wide conf file for ecli...
What is the worst real-world macros/pre-processor abuse you've ever come across?
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87
"Compiler found error in code. This is punishment". !! Company found you ... punishment to the fellow employees !
– L...
Difference between array_map, array_walk and array_filter
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ArtefactoArtefacto
87.4k1414 gold badges185185 silver badges211211 bronze badges
...
Hiding a password in a python script (insecure obfuscation only)
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Base64 encoding is in the standard library and will do to stop shoulder surfers:
>>> import base64
>>> print(base64.b64encode("password".encode("utf-8")))
cGFzc3dvcmQ=
>>> print(base64.b64decode("cGFz...
Ignoring time zones altogether in Rails and PostgreSQL
...\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4.61182 48.1414 4.61182C47.4335 4.61182 46.7...
embedding image in html email
...images at various locations in the email.
<img src="data:image/jpg;base64,{{base64-data-string here}}" />
And to make this post usefully for others to:
If you don't have a base64-data string, create one easily at:
http://www.motobit.com/util/base64-decoder-encoder.asp from a image file.
Em...