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Java 8: performance of Streams vs Collections
I'm new to Java 8. I still don't know the API in depth, but I've made a small informal benchmark to compare the performance of the new Streams API vs the good old Collections.
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What is the difference between graph search and tree search?
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If you're dealing with a tree-shaped problem, both algorithm variants lead to equivalent results. So you can pick the simpler tree search variant.
Difference Between Graph and Tree Search
Your basic graph search algorithm looks something like the following. With a start node start, directed edg...
What is the most efficient/elegant way to parse a flat table into a tree?
... relational database. What you show in your example uses two methods:
Adjacency List (the "parent" column) and
Path Enumeration (the dotted-numbers in your name column).
Another solution is called Nested Sets, and it can be stored in the same table too. Read "Trees and Hierarchies in SQL ...
Is 'switch' faster than 'if'?
... jmp void call<19u>() # TAILCALL
.LJTI0_0:
.quad .LBB0_2
.quad .LBB0_3
.quad .LBB0_4
.quad .LBB0_5
.quad .LBB0_6
.quad .LBB0_7
.quad .LBB0_8
.quad .LBB0_9
.quad .LBB0_10
.quad .LB...
Difference between git checkout --track origin/branch and git checkout -b branch origin/branch
... is, as commented by Sebastian Graf, if the local branch did not exist already.
If it did, you would need git checkout -B abranch origin/abranch)
Note: with Git 2.23 (Q3 2019), that would use the new command git switch:
git switch -c <branch> --track <remote>/<branch>
If t...
Is it possible to rename a maven jar-with-dependencies?
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Rich SellerRich Seller
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Convert JavaScript string in dot notation into an object reference
...l reduce code complexity and keep things simple, you should probably go ahead and do what OP is asking for. However, if that's not the case, consider if any of these apply:
case 1: As the primary method of working with your data (e.g. as your app's default form of passing objects around and der...
Measure time in Linux - time vs clock vs getrusage vs clock_gettime vs gettimeofday vs timespec_get?
...2008 says that. "Applications should use the clock_gettime() function instead of the obsolescent gettimeofday() function", so you should stay away from it. Linux x86 and implements it as a system call.
mach_absolute_time() is an option for very high resolution (ns) timing on OS X. On my system, this...
Why is “except: pass” a bad programming practice?
...questions about how the use of except: pass is discouraged. Why is this bad? Sometimes I just don't care what the errors are and I want to just continue with the code.
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How to create a MySQL hierarchical recursive query
...bles are assigned and modified during its execution. Some assumptions are made about the order of execution:
The from clause is evaluated first. So that is where @pv gets initialised.
The where clause is evaluated for each record in the order of retrieval from the from aliases. So this is where a ...