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scala vs java, performance and memory? [closed]
...en selected? I.e. they are optimised in different ways for different data sets?
– Seth
May 9 '12 at 1:53
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Properly removing an Integer from a List
Here's a nice pitfall I just encountered.
Consider a list of integers:
8 Answers
8
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What's the syntax for mod in java
As an example in pseudocode:
17 Answers
17
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Add unique constraint to combination of two columns
...o.BlockDuplicatesYourTable
ON dbo.YourTable
INSTEAD OF INSERT
AS
BEGIN
SET NOCOUNT ON;
IF NOT EXISTS (SELECT 1 FROM inserted AS i
INNER JOIN dbo.YourTable AS t
ON i.column1 = t.column1
AND i.column2 = t.column2
)
BEGIN
INSERT dbo.YourTable(column1, column2, ...)
SEL...
How can I convert immutable.Map to mutable.Map in Scala?
...he new copy to save time, or you double your access times by reading changesets instead of the original map. Which one performs best probably depends on your use case.
– Rex Kerr
Feb 18 '11 at 16:00
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Remove duplicate rows in MySQL
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For InnoDB tables execute the following query first: set session old_alter_table=1;
– shock_one
Feb 24 '14 at 10:01
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Why declare unicode by string in python?
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Thanks for the explanation! I'll set this as accepted since is the most complete one :)
– Oscar Carballal
Jul 3 '10 at 4:38
2
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RegEx match open tags except XHTML self-contained tags
...sible, it's sometimes appropriate to use them for parsing a limited, known set of HTML.
If you have a small set of HTML pages that you want to scrape data from and then stuff into a database, regexes might work fine. For example, I recently wanted to get the names, parties, and districts of Aust...
Which encoding opens CSV files correctly with Excel on both Mac and Windows?
...aling with Excel. Since its basically Microsofts own proprietary character set, one can assume it will work on both the Mac and the Windows version of MS-Excel. Both versions at least include a corresponding "File origin" or "File encoding" selector which correctly reads the data.
Depending on your...
RegEx to parse or validate Base64 data
...ge we can use this regex
/^data:image/(?:gif|png|jpeg|bmp|webp)(?:;charset=utf-8)?;base64,(?:[A-Za-z0-9]|[+/])+={0,2}
private validBase64Image(base64Image: string): boolean {
const regex = /^data:image\/(?:gif|png|jpeg|bmp|webp)(?:;charset=utf-8)?;base64,(?:[A-Za-z0-9]|[+/])+={0,2}/;
...