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Creating my own Iterators
...MO) elegant solution for exactly your problem: exposing member collections from an object, using Boost.Iterators.
If you want to use the stl only, the Josuttis book has a chapter on implementing your own STL iterators.
shar...
What is the difference between RDF and OWL? [closed]
...en to a logical extreme. They have the advantage that you can load triples from many sources into one database with no reconfiguration.
RDF and RDFS
The next layer is RDF - The Resource Description Framework. RDF defines some extra structure to triples. The most important thing RDF defines is a pr...
Java, Classpath, Classloading => Multiple Versions of the same jar/project
...
@deckingraj: after some googling i found this from oracle docs: "In the delegation design, a class loader delegates classloading to its parent before attempting to load a class itself. [...] If the parent class loader cannot load a class, the class loader attempts to loa...
How to make sure that string is valid JSON using JSON.NET
... if the string starts with { or [ and ends with } or ] respectively (added from this answer):
private static bool IsValidJson(string strInput)
{
if (string.IsNullOrWhiteSpace(strInput)) { return false;}
strInput = strInput.Trim();
if ((strInput.StartsWith("{") && strInput.EndsWit...
MySQL Error 1215: Cannot add foreign key constraint
... Explosion Pill's answer covers the basics. You want to make sure to start from there. However, there are more, much more subtle cases to look out for:
For example, when you try to link up PRIMARY KEYs of different tables, make sure to provide proper ON UPDATE and ON DELETE options. E.g.:
...
PRIM...
UnicodeDecodeError: 'charmap' codec can't decode byte X in position Y: character maps to
...so tried with other encoding but all in vain. In this code I am also using from geotext import GeoText. Please suggest a solution.
– Salah
Jun 4 '18 at 14:37
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Meaning of acronym SSO in the context of std::string
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Background / Overview
Operations on automatic variables ("from the stack", which are variables that you create without calling malloc / new) are generally much faster than those involving the free store ("the heap", which are variables that are created using new). However, the size ...
How to Correctly handle Weak Self in Swift Blocks with Arguments
...you had to go with [weak self] instead.
I really liked the whole section from the manual on using strong, weak, and unowned in closures:
https://developer.apple.com/library/content/documentation/Swift/Conceptual/Swift_Programming_Language/AutomaticReferenceCounting.html
Note: I used the term clo...
Hex representation of a color with alpha channel?
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In CSS 3, to quote from the spec, "there is no hexadecimal notation for an RGBA value" (see CSS Level 3 spec). Instead you can the use rgba() functional notation with decimals or percentages, e.g. rgba(255, 0, 0, 0.5) would be 50% transparent r...
In git, is there a way to show untracked stashed files without applying the stash?
... of a stash commit. (This isn't actually documented, but is pretty obvious from The commit which introduced the -u feature, 787513..., and the way the rest of the documentation for git-stash phrases things... or just by doing git log --graph stash@{0})
You can view just the "untracked" portion of t...