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CORS - What is the motivation behind introducing preflight requests?
...ary of the preflight mechanism. Yes these services could already be abused by a malicious or non-conforming user agent (and CORS does nothing to change this), but in a world with CORS the preflight mechanism provides an extra 'sanity check' so that clients and servers don't break because the underly...
Why does PEP-8 specify a maximum line length of 79 characters? [closed]
...time. Also it makes it easier for people with larger screens to multi-task by being able to set up multiple windows to be side by side.
Readability is also one of the reasons for enforced line indentation.
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Read an Excel file directly from a R script
...acter data (i.e., not comma-formatted numbers, dates, formulas with divide-by-zero errors, missing values, etc. etc. ..) I generally have no problem with this process.
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How to suppress “unused parameter” warnings in C?
...e of many that have to have the same signature because they are referenced by a function pointer.
– josch
Sep 19 '14 at 5:50
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Can't connect to localhost on SQL Server Express 2012 / 2016
...ou need to verify that the SQL Server service is running. You can do this by going to Start > Control Panel > Administrative Tools > Services, and checking that the service SQL Server (SQLEXPRESS) is running. If not, start it.
While you're in the services applet, also make sure that the se...
What breaking changes are introduced in C++11?
...hread_local
Certain integer literals larger than can be represented by long could change from an unsigned integer type to signed long long.
Valid C++ 2003 code that uses integer division rounds the result toward 0 or toward negative infinity, whereas C++0x always rounds the result towa...
Persistence unit as RESOURCE_LOCAL or JTA?
... managing transactions themselves (RESOURCE_LOCAL), or having them managed by the application server's JTA implementation.
In most cases, RESOURCE_LOCAL is fine. This would use basic JDBC-level transactions. The downside is that the transaction is local to the JPA persistence unit, so if you want a...
Delete topic in Kafka 0.8.1.1
...ble=true can be located in the server.properties file. It is commented out by default.
– Shanemeister
Mar 10 '17 at 1:34
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What is the significance of ProjectTypeGuids tag in the visual studio project file
...CHINE\SOFTWARE\Microsoft\VisualStudio\10.0\Packages for packages reference by some project
Some ProjectTypeGuids
Windows (C#) {FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}
Windows (VB.NET) {F184B08F-C81C-45F6-A57F-5ABD9991F28F}
Windows (Visual C++) {8BC9CEB8-8B4A-11D0-8D11-00A0C91BC94...
Python “extend” for a dictionary
...c":5} to dict {"a":2, "b":3,"c":5}? Of course it's possible using update() by moving some stuff around, but it would be nicer if it could be accomplished in only one line...
– Nearoo
Jan 6 '16 at 16:28
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