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Possible heap pollution via varargs parameter
...istOfAs; // points to a list of As
This can lead to "unexplainable" ClassCastExceptions.
// if the heap never gets polluted, this should never throw a CCE
B b = listOfBs.get(0);
@SafeVarargs does not prevent this at all. However, there are methods which provably will not pollute the heap, the ...
How can I convert JSON to a HashMap using Gson?
I'm requesting data from a server which returns data in the JSON format. Casting a HashMap into JSON when making the request wasn't hard at all but the other way seems to be a little tricky. The JSON response looks like this:
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C++使用OLE/COM高速读写EXCEL的源码 - C/C++ - 清泛网 - 专注C/C++及内核技术
...下步骤：
1、导入并封装Excel中的接口
Excel作为OLE/COM库插件，定义好了各类交互的接口，这些接口是跨语言的接口。VC可以通过导入这些接口，并通过接口来对Excel的操作。
由于本文只关心对Excel表格中的数据的读取，主要关注...
Creating a new user and password with Ansible
... - user: name=tset password={{password}}
If your playbook or ansible command line has your password as-is in plain text, this means your password hash recorded in your shadow file is wrong. That means when you try to authenticate with your password its hash will never match.
Additionally, see Ans...
How to convert an object to a byte array in C#
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@Smith: You can cast the enum to int (or if you have specified any other type as storage for the enum) and write it. When you read it you can cast it to the enum type.
– Guffa
May 3 '15 at 21:40
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composer: How to find the exact version of a package?
...ut...
composer.phar show
Will show all the currently installed packages and their version information. (This was shown in previous versions of Composer only when using the now-deprecated -i option.)
To see more details, specify the name of the package as well:
composer.phar show monolog/monolo...
Extension methods cannot be dynamically dispatched
...ou are using dynamic types in extension methods, which is not supported.
Cast the dynamic types to actual types, and it will work.
From what I see now, I'd say:
(string) ViewBag.MagNo
Which would result in
@foreach (var item in Model)
{
@Html.DropDownListFor(modelItem => item.TitleIds,...
When is assembly faster than C?
...2 bits: MSVC doesn't always do a good job when multiplying 32-bit integers cast to 64, so intrinsics helped a lot.
C doesn't have a full-multiplication operator (2N-bit result from N-bit inputs). The usual way to express it in C is to cast the inputs to the wider type and hope the compiler rec...
Get value from SimpleXMLElement Object
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You have to cast simpleXML Object to a string.
$value = (string) $xml->code[0]->lat;
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Getting only Month and Year from SQL DATE
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great! You can connect them to one column: 'select cast(month(dateField) as varchar) + '.' + cast(year(dateField) as varchar)'
– izik f
Mar 27 '18 at 9:59
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