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Can JSON start with “[”?
...are bracket (i.e. an array). But in addition to objects and arrays, it can now also be a number, string or the values false, null or true.
Also, this has changed from my previous RFC 4627 quote (emphasis added):
A JSON text is a sequence of tokens. The set of tokens includes six
structural c...
SQL update fields of one table from fields of another one
...ng the column names?
General solution with dynamic SQL
You don't need to know any column names except for some unique column(s) to join on (id in the example). Works reliably for any possible corner case I can think of.
This is specific to PostgreSQL. I am building dynamic code based on the the inf...
What is a Java ClassLoader?
...it to a JAR and maybe include a few extra library JARs, you don't need to know about class loaders, it will just work.
Still, it is helpful to know a bit about class loaders and class loading to better understand what goes on behind the scenes. As an example, "static initializers" will run when a c...
Get list of data-* attributes using javascript / jQuery
...
@Ethan - Fixed. Thanks for letting me know. I had been using beautify.js from jsbeautifier.org to pretty print the JSON. Apparently that link is broken now. But, that was overkill since JSON.stringify() has JSON formatting built in.
– gill...
How does push notification technology work on Android?
...ts confirmed the client is polling along a tcp connection right ? do you know how often it polls for data ? is it every 5 seconds for example. or is it fast like a heartbeat ?
– j2emanue
Apr 10 '19 at 8:58
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Should I use #define, enum or const?
...o useful for debugging; use it in initialisation lists and destructors to know if the variable's value should be used.
xInvalid = 16 };
Consider that you have two purposes for this type. To track the current state of a record and to create a mask to select records in certain states. Create an inl...
Posting a File and Associated Data to a RESTful WebService preferably as JSON
... wanting to use JSON for the request and if that was possible. I already know that I could send it the way you suggest.
– Gregg
Nov 3 '10 at 3:05
16
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Why would you use Expression rather than Func?
...s an int a. On the right side you add 1 to it." That's it. You can go home now. It's obviously more structured than that, but that's essentially all an expression tree really is--nothing to wrap your head around.
Understanding that, it becomes clear why LINQ-to-SQL needs an Expression, and a Func i...
C++ Dynamic Shared Library on Linux
...ass* instead? I'm not asking you to change this for me, I'd just like to know if there's a reason to use one over the other.
– Bill the Lizard
Jan 30 '09 at 21:05
1
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valueOf() vs. toString() in Javascript
...d no hint, meaning conversion to string will occur, one of the operands is now a string, String(1) + String({}), `1[object Object]`
[] + [] // '' Two objects, `ToPrimitive` passed no hint, String([]) + String([]), '' (empty string)
1 - 'a' // NaN Both are primitives, one is a string, `T...