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Non-Relational Database Design [closed]
... and therefore the conceptual data design will also differ a lot. In the thread Data Design in Non-Relational Databases of the NOSQL Google group the different paradigms are categorized like this:
Bigtable-like systems (HBase,
Hypertable, etc)
Key-value stores (Tokyo, Voldemort,
etc)
Document data...
How to correctly close a feature branch in Mercurial?
...it --close-branch
hg up default
hg merge myBranch
Hope this helps future readers.
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Can I have an IF block in DOS batch file?
...egin with echo.
I'm using the built-in ERRORLEVEL variable just as a test. Read more here
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What really is a deque in STL?
...
(This is an answer I've given in another thread. Essentially I'm arguing that even fairly naive implementations, using a single vector, conform to the requirements of "constant non-amortized push_{front,back}". You might be surprised, and think this is impossible, but...
Is there YAML syntax for sharing part of a list or map?
... would be cleaner; you would at least have all the data grouped together already, and your YAML would be standard.
– kittemon
Mar 2 '12 at 0:39
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Java HashMap performance optimization / alternative
...ust got an up-vote on this answer 6 years after posting which led me to re-read the question.
The hash function given in the question is not a good hash for 26 million entries.
It adds together a[0]+a[1] and b[0]+b[1]+b[2]. He says values of each byte range from 0 to 51, so that gives only (51*2+1...
Haskell: Lists, Arrays, Vectors, Sequences
I'm learning Haskell and read a couple of articles regarding performance differences of Haskell lists and (insert your language)'s arrays.
...
How to create a memory leak in Java?
...stored in memory) in pure Java:
The application creates a long-running thread (or use a thread pool to leak even faster).
The thread loads a class via an (optionally custom) ClassLoader.
The class allocates a large chunk of memory (e.g. new byte[1000000]), stores a strong reference to it in a stat...
How can I respond to the width of an auto-sized DOM element in React?
...s a child.
What you render has to get mounted before the DOM props can be read; when those props aren't available during the initial render, you might want to use style={{visibility: 'hidden'}} so that the user can't see it before it gets a JS-computed layout.
// @flow
import React, {Component} f...
How to append rows to an R data frame
...lution
This is basically copy&paste of Karsten W. answer on similar thread.
create.3<-function(elems)
{
con <- RSQLite::dbConnect(RSQLite::SQLite(), ":memory:")
RSQLite::dbWriteTable(con, 't', as.data.frame(elems))
return(con)
}
append.3<-function(con, elems)
{
RSQLite::dbWr...