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How does PHP 'foreach' actually work?
...bjects have by-handle passing semantics, which for most practical purposes means that they behave like references. So objects can always be changed during iteration.
The problem with allowing modifications during iteration is the case where the element you are currently on is removed. Say you use ...
Create a tar.xz in one command
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-f does not mean "from file" when passed to xz. Instead it is short for --force (see xz(1) for details), and is best not used unless needed.
– Eliah Kagan
Apr 16 '15 at 17:41
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What does Java option -Xmx stand for? [duplicate]
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I was hoping to find the meaning of X, as I'm looking for what -XX stands for. What the shortcut means....
– Sebastian
Sep 29 '14 at 14:41
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What optimizations can GHC be expected to perform reliably?
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What do you mean by "things have to be named correctly for fusion to work" exactly?
– Vincent Beffara
Feb 5 '14 at 10:37
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Cookie overflow in rails application?
...session'
UPDATE:
If anyone is receiving a null value in column "session_id" violates not-null constraint message in rails 4, there's a workaround in github(not tested). You must to create an initializer with ActiveRecord::SessionStore::Session.attr_accessible :data, :session_id
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Get content uri from file path in android
...th the above solutions returns: 1. file:///storage/emulated/0/DCIM/Camera/VID_20140312_171146.mp4 2. /storage/emulated/0/DCIM/Camera/VID_20140312_171146.mp4 But what i was looking for is something different. I need the content:// format URI. The answer from Jinal seems to work perfect
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SQL Server Text type vs. varchar data type [closed]
...ing value
If you always select it or use it in joins.
By selecting here I mean issuing any queries that return the value of the column.
By searching here I mean issuing any queries whose result depends on the value of the TEXT or VARCHAR column. This includes using it in any JOIN or WHERE condition...
Why do you need to create a cursor when querying a sqlite database?
...st a misapplied abstraction it seems to me. A db cursor is an abstraction, meant for data set traversal.
From Wikipedia article on subject:
In computer science and technology, a database cursor is a control
structure that enables traversal over the records in a database.
Cursors facilitate ...
SQL Call Stored Procedure for each Row without using a cursor
...oes have its place..
-- Declare & init (2008 syntax)
DECLARE @CustomerID INT = 0
-- Iterate over all customers
WHILE (1 = 1)
BEGIN
-- Get next customerId
SELECT TOP 1 @CustomerID = CustomerID
FROM Sales.Customer
WHERE CustomerID > @CustomerId
ORDER BY CustomerID
-- Exit lo...
Maximum Length of Command Line String
In Windows, what is the maximum length of a command line string? Meaning if I specify a program which takes arguments on the command line such as abc.exe -name=abc
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