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Database Structure for Tree Data Structure
...
You mention the most commonly implemented, which is Adjacency List:
https://blogs.msdn.microsoft.com/mvpawardprogram/2012/06/25/hierarchies-convert-adjacency-list-to-nested-sets
There are other models as well, including materialized path and nested sets:
http://communities.bmc.com/communitie...
How to make join queries using Sequelize on Node.js
...ing from two tables, but the result should be the same
Further reading:
http://docs.sequelizejs.com/en/latest/docs/associations/#one-to-one-associations
http://docs.sequelizejs.com/en/latest/docs/associations/#one-to-many-associations
http://docs.sequelizejs.com/en/latest/docs/models-usage/#eager...
How do I use Assert to verify that an exception has been thrown?
...d message text.", ex.Message );
Assert.AreEqual( 5, ex.SomeNumber);
See: http://nunit.org/docs/2.5/exceptionAsserts.html
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Search and Replace with RegEx components in Atom editor
....*" button at the right side. Click it and now it's regex mode.
I find
(http.*)\{\.uri\}
and replace to
[$1]($1)
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Why and when to use Node.js? [duplicate]
...hronous callbacks for your I/O.
It gives you useful tools like creating a HTTP server, creating a TCP server, handling file I/O.
It's a low level highly performant platform for doing any kind of I/O without having to write the entire thing in C from scratch. And it scales very well due to the non-...
https URL with token parameter : how secure is it?
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I hadn't thought about the HTTP-referer problem, but the url link would redirect to the result page, it wouldn't be a proper page (no google analytics or other third party script).
– Flackou
Mar 13 '09 at 16:41
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How to parse Excel (XLS) file in Javascript/HTML5
...rmat) data to JSON. you can add promise to the function.
<script src="https://cdnjs.cloudflare.com/ajax/libs/xlsx/0.8.0/jszip.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/xlsx/0.8.0/xlsx.js"></script>
<script>
var ExcelToJSON = function() {
thi...
Assign width to half available screen width declaratively
...8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_p...
Set default CRAN mirror permanent in R
...a CRAN mirror
# local({r <- getOption("repos")
# r["CRAN"] <- "http://my.local.cran"
# options(repos=r)})
So remove the comment marks and change "http://my.local.cran" to the correct website, e.g.:
local({r <- getOption("repos")
r["CRAN"] <- "http://cran.r-project.o...
How can you make a custom keyboard in Android?
...
<?xml version="1.0" encoding="utf-8"?>
<Keyboard xmlns:android="http://schemas.android.com/apk/res/android"
android:keyWidth="15%p"
android:keyHeight="15%p" >
<Row>
<Key android:codes="1" android:keyLabel="1" android:horizontalGap="4%p"/>
<...