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Why does PostgreSQL perform sequential scan on indexed column?
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If the SELECT returns more than approximately 5-10% of all rows in the table, a sequential scan is much faster than an index scan.
This is because an index scan requires several IO operations for each row (look up the row in the index, then retrieve the row from the heap...
How do I update zsh to the latest version?
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answered Jul 15 '13 at 8:30
Mike LiMike Li
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How to create nonexistent subdirectories recursively using Bash?
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edited Jun 20 at 9:12
Community♦
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answered Nov 13 '09 at 20:42
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json.net has key method?
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svicksvick
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Removing non-repository files with git?
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edited Oct 27 '14 at 14:08
Julien Roncaglia
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MbUnit under Linux, used within an F# project?
...entioned here in "ASP.NET MVC 4 in Action":
ftp://soporte.uson.mx/PUBLICO/02_ING.SISTEMAS.DE.INFORMACION/PVI/ASP.NET%20MVC%204%20in%20Action.pdf
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Detecting CTRL+C in Node.js
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edited Nov 10 '17 at 2:23
user6269864
answered Nov 23 '13 at 17:38
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How can I get nth element from a list?
...re, the operator used is !!.
I.e. [1,2,3]!!1 gives you 2, since lists are 0-indexed.
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What is the difference between “def” and “val” to define a function
... time (new instance of Function1).
def even: Int => Boolean = _ % 2 == 0
even eq even
//Boolean = false
val even: Int => Boolean = _ % 2 == 0
even eq even
//Boolean = true
With def you can get new function on every call:
val test: () => Int = {
val r = util.Random.nextInt
() => ...
.NET - How can you split a “caps” delimited string into an array?
...-z]))", "$1 ")
If you need to handle digits:
/([A-Z]+(?=$|[A-Z][a-z]|[0-9])|[A-Z]?[a-z]+|[0-9]+)/g
Regex.Replace(s,"([a-z](?=[A-Z]|[0-9])|[A-Z](?=[A-Z][a-z]|[0-9])|[0-9](?=[^0-9]))","$1 ")
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