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Why doesn't Dijkstra's algorithm work for negative weight edges?
... A
/ \
/ \
/ \
5 2
/ \
B--(-10)-->C
V={A,B,C} ; E = {(A,C,2), (A,B,5), (B,C,-10)}
Dijkstra from A will first develop C, and will later fail to find A->B->C
EDIT a bit deeper explanation:
Note that this is important, because in each relaxa...
Count rows with not empty value
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answered Sep 22 '14 at 22:03
eniacAvengereniacAvenger
77988 silver badges1717 bronze badges
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increment date by one month
Let's say I have a date in the following format: 2010-12-11 (year-mon-day)
17 Answers
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Why does this Java code compile?
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101
tl;dr
For fields, int b = b + 1 is illegal because b is an illegal forward reference to b. You...
Convert string to binary in python
... = "hello world"
>>> ' '.join(format(ord(x), 'b') for x in st)
'1101000 1100101 1101100 1101100 1101111 100000 1110111 1101111 1110010 1101100 1100100'
#using `bytearray`
>>> ' '.join(format(x, 'b') for x in bytearray(st, 'utf-8'))
'1101000 1100101 1101100 1101100 1101111 100000 1...
Hidden Features of Xcode 4
...sistant (the right hand pane) go away
shift-cmd-Y to hide the debugger
cmd-0 to hide the navigator (left pane)
cmd-[1..n] switch between navigators on left
cmd-opt-[1..n] switch between utilities (thing generally on right)
ctrl-[1..n] switch between various related files in the editor
Overall, Xco...
Lambda capture as const reference?
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const isn't in the grammar for captures as of n3092:
capture:
identifier
& identifier
this
The text only mention capture-by-copy and capture-by-reference and doesn't mention any sort of const-ness.
Feels like an oversight to me, but I haven't followed the sta...
Find in Files: Search all code in Team Foundation Server
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Team Foundation Server 2015 (on-premises) and Visual Studio Team Services (cloud version) include built-in support for searching across all your code and work items.
You can do simple string searches like foo, boolean operations like foo OR bar or ...
Difference between StringBuilder and StringBuffer
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Raimund Krämer
1,03677 silver badges2626 bronze badges
answered Dec 10 '08 at 4:36
sblundysblundy
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How can you zip or unzip from the script using ONLY Windows' built-in capabilities?
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Back in 2013, that was not possible. Microsoft didn't provide any executable for this.
See this link for some VBS way to do this.
https://superuser.com/questions/201371/create-zip-folder-from-the-command-line-windows
From Windows 8 ...