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When to use .First and when to use .FirstOrDefault with LINQ?
...the check. (It is bad practice and might hurt performance).
Finally, the difference between First() and Take(1) is that First() returns the element itself, while Take(1) returns a sequence of elements that contains exactly one element.
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What is the difference between HAVING and WHERE in SQL?
...count for this, again an opportunity for improvement within the industry.
Now consider for a moment removing WHERE from the language. This time the majority of queries in existence would need to be rewritten without an obvious alternative construct. Coders would have to get creative e.g. inner join...
Requirejs why and when to use shim config
...on't support AMD.
The "init" hook lets you do other advanced things, e.g. if a library would normally export two different things into the global namespace but you want to redefine them under a single namespace. Or, maybe you want to do some monkey patching on a methods in the library that you're l...
How to slice an array in Bash
...o a convenient shortcut to get all elements of the array starting with specified index. For example "${A[@]:1}" would be the "tail" of the array, that is the array without its first element.
version=4.7.1
A=( ${version//\./ } )
echo "${A[@]}" # 4 7 1
B=( "${A[@]:1}" )
echo "${B[@]}" # 7 1
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Is a Python list guaranteed to have its elements stay in the order they are inserted in?
If I have the following Python code
6 Answers
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What is the difference between & vs @ and = in angularJS
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The links to these appear to have changed, they are now: egghead.io/lessons/angularjs-isolate-scope-attribute-binding , egghead.io/lessons/angularjs-isolate-scope-expression-binding , egghead.io/lessons/angularjs-isolate-scope-two-way-binding , egghead.io/lessons/angularjs-iso...
Django Setup Default Logging
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@arindamroychowdhury With the above configuration if you do logger = logging.getLogger('foo'); logger.warn('bar'); then the default handler will catch that logging and something like <time> WARN: foo: bar will end up in logs/mylog.log
– Chris W.
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How to replace local branch with remote branch entirely in Git?
...replace whichever branch your currently on with the contents of master. So if you're on e.g. a feature-branch, it will replace all its commits with master, so make sure you've checked out the branch you're replacing first.
– Zoltán
Jul 15 '16 at 8:29
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VC菜单命令详解(文件打开、保存与关闭) - C/C++ - 清泛网 - 专注C/C++及内核技术
...，若已有文档打开，对其重新初始化，调用CDocument::SaveModified()保存当前文档；若没
有文档存在，则调用CreateNewDocument()创建文档对象，再调用CreateNewFrame(pDoucment,NULL)创建
文档的框架窗口。2，若lpszPathName为NULL，则调用CDocume...
How to force file download with PHP
...t type based on your file application/zip, application/pdf etc. - but only if you do not want to trigger the save-as dialog.
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