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.NET data structures: ArrayList, List, HashTable, Dictionary, SortedList, SortedDictionary — Speed,
...of complex data structures. Unfortunately, some of them are quite similar, and I'm not always sure when to use one and when to use another. Most of my C# and Visual Basic books talk about them to a certain extent, but they never really go into any real detail.
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Getting current unixtimestamp using Moment.js
...to get the Unix TimeStamp using Moment.js.
I can find many functions which convert timestamp to date in moment.js.
I know that I can easily get the unix timestamp by using the following JavaScript function: Math.floor(new Date().getTime()/1000) .
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JFrame in full screen Java
I will be doing a project soon and I will have to use full screen mode in it.
13 Answers
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Lambda capture as const reference?
...entifier
& identifier
this
The text only mention capture-by-copy and capture-by-reference and doesn't mention any sort of const-ness.
Feels like an oversight to me, but I haven't followed the standardization process very closely.
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Check if a row exists, otherwise insert
...erbook a flight, as it will insert a new row when there are 10 tickets max and you are booking 20.
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Computed / calculated / virtual / derived columns in PostgreSQL
... Postgres 11 generated columns are not supported - as defined in the SQL standard and implemented by some RDBMS including DB2, MySQL and Oracle. Nor the similar "computed columns" of SQL Server.
STORED generated columns are introduced with Postgres 12. Trivial example:
CREATE TABLE tbl (
int1 ...
UnicodeDecodeError: 'ascii' codec can't decode byte 0xef in position 1
...inal doesn't interpret it as utf8 you end up with garbage. with decode you convert it to unicode, then you can encode it again to an encoding your terminal understands.
– mata
May 12 '12 at 8:29
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Retain precision with double in Java
...of 11.4.
Now, a little explanation into why this is happening:
The float and double primitive types in Java are floating point numbers, where the number is stored as a binary representation of a fraction and a exponent.
More specifically, a double-precision floating point value such as the double...
How to trigger event when a variable's value is changed?
...ever the value of a field is going to change.
You can have your own EventHandler delegate or you can use the famous System.EventHandler delegate.
Usually there's a pattern for this:
Define a public event with an event handler delegate (that has an argument of type EventArgs).
Define a protected ...
What does {0} mean when initializing an object?
... object, what does it mean? I can't find any references to {0} anywhere, and because of the curly braces Google searches are not helpful.
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