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How do I check if a variable exists?
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My point is that a block "if last: draw(last, current); last=current" is easy to understand and not poor programming. Adding a "try/except" to check for the existence of "last" before being able to test it detracts from readability of that cod...
JavaScript Nested function
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@ZiyangZhang, the paragraph after that code block has the explanation, was there a particular part that is unclear?
– zzzzBov
Aug 13 '17 at 16:21
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What is the (function() { } )() construct in JavaScript?
...ecuted right after it's created, not after it is parsed. The entire script block is parsed before any code in it is executed. Also, parsing code doesn't automatically mean that it's executed, if for example the IIFE is inside a function then it won't be executed until the function is called.
Updat...
Prevent onmouseout when hovering child element of the parent absolute div WITHOUT jQuery
... controller elements (edit, delete) inside the area, because this solution blocks them too..
– Zoltán Süle
Oct 9 '18 at 15:23
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How to download and save a file from Internet using Java?
...ovided a zero length buffer or count, 'little pause' or otherwise. It will block until at least one byte has been transferred or end of stream or an error occurs. Your claim about the internals of Files.copy() is baseless.
– Marquis of Lorne
Jul 5 '16 at 9:26
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WakeLock 扩展：保持设备唤醒扩展，防止系统休眠和电池优化 · App Inventor 2 中文网
...g:hover { color: #3773f5 } .feedback-pop .feedback-img { display: inline-block; width: 24px; height: 24px; margin-bottom: 4px; background: url(/static/images/feedback.svg) 50% / 100% auto no-repeat; } /*手机版：反馈浮动按钮收小*/ @media screen and (max-width: 700px) { .feedback-po...
What is the Python equivalent of static variables inside a function?
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@leewangzhong: Does enclosing a block that doesn't raise an exception within try add any cost? Just curious.
– trss
Jul 23 '14 at 20:04
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How To Test if Type is Primitive
I have a block of code that serializes a type into a Html tag.
12 Answers
12
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When does System.gc() do something?
... after a System.gc(), because normally you want to know how much memory is blocked by uncollectable instances. Only to be used in debugging/memory profiling of course, never in production.
– sleske
May 11 '09 at 9:43
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App Inventor 2 字典代码块 · App Inventor 2 中文网
...g:hover { color: #3773f5 } .feedback-pop .feedback-img { display: inline-block; width: 24px; height: 24px; margin-bottom: 4px; background: url(/static/images/feedback.svg) 50% / 100% auto no-repeat; } /*手机版：反馈浮动按钮收小*/ @media screen and (max-width: 700px) { .feedback-po...