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How can I determine if a variable is 'undefined' or 'null'?

...enceError and break execution if variable is not defined or referred to at all in the code, using typeof is safer. – Mani Gandham Jun 15 '14 at 9:49 59 ...
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How to do case insensitive string comparison?

...y to do it (if you're not worried about special Unicode characters) is to call toUpperCase: var areEqual = string1.toUpperCase() === string2.toUpperCase(); share | improve this answer | ...
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Why should I use Google's CDN for jQuery?

... This is because: It increases the parallelism available. (Most browsers will only download 3 or 4 files at a time from any given site.) It increases the chance that there will be a cache-hit. (As more sites follow this practice, more users already have the fil...
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Find substring in the string in TWIG

...e=\"evenodd\" d=\"M25.6622 17.6335C27.8049 17.6335 29.3739 16.9402 30.2537 15.6379C30.8468 14.7755 30.9615 13.5579 30.9615 11.9512V6.59049C30.9615 5.28821 30.4833 4.66231 29.4502 4.66231C28.9913 4.66231 28.4555 4.94978 28.1109 5.50789C27.499 4.86533 26.7335 4.56087 25.7005 4.56087C23.1369 4.56087 21...
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ElasticSearch - Return Unique Values

How would I get the values of all the languages from the records and make them unique. 5 Answers ...
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HtmlSpecialChars equivalent in Javascript?

... @jbo5112 good point, I didn't realize JS allowed callbacks for replacement. This code is easier to understand though, and I doubt that shaving a few milliseconds off of escapeHtml() is going to make a difference unless you are calling it hundreds of times in a row f...
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线程访问窗口资源的问题 - C/C++ - 清泛网 - 专注C/C++及内核技术

...并行运行的窗口)。在工作线程里调用AfxGetMainWnd()->m_hWnd出错,也会发生发生内存访问冲突。(AfxGetMainWnd得到的是当前线程的主窗口)。 2.ASSERT((p = pMap->LookupPermanent(m_hWnd)) != NULL || (p = pMap->LookupTemporary(m_hWnd)) != NULL)失败;从...
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jQuery table sort

... If you want to avoid all the bells and whistles then may I suggest this simple sortElements plugin. Usage: var table = $('table'); $('.sortable th') .wrapInner('<span title="sort this column"/>') .each(function(){ var th ...
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Grab a segment of an array in Java without creating a new array on heap

...wer by @unique72 is correct. Imma let this edit sit for a bit and then I shall delete this answer.) I don't know of a way to do this directly with arrays without additional heap allocation, but the other answers using a sub-list wrapper have additional allocation for the wrapper only – but not...
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Remove first element from $@ in bash [duplicate]

... | edited Nov 15 '16 at 20:48 twasbrillig 10.4k66 gold badges3636 silver badges5757 bronze badges ...