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Checking whether something is iterable
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The proper way to check for iterability is as follows:
function isIterable(obj) {
// checks for null and undefined
if (obj == null) {
return false;
}
return typeof obj[Symbol.iterator] === 'function';
}
Why this works (iterable protocol i...
SVN (Subversion) Problem “File is scheduled for addition, but is missing” - Using Versions
...le via
svn add myfile
you only told svn to put this file into your repository when you do your next commit. There's no change to the repository before you type an
svn commit
If you delete the file before the commit, svn has it in its records (because you added it) but cannot send it to the rep...
SQL is null and = null [duplicate]
...considered as false for the purposes of a where clause (strictly speaking, it's "not true", rather than "false", but the effect is the same).
The reasoning is that a null means "unknown", so the result of any comparison to a null is also "unknown". So you'll get no hit on rows by coding where my_co...
Best way to convert an ArrayList to a string
...that I want to output completely as a String. Essentially I want to output it in order using the toString of each element separated by tabs. Is there any fast way to do this? You could loop through it (or remove each element) and concatenate it to a String but I think this will be very slow.
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Define a lambda expression that raises an Exception
How can I write a lambda expression that's equivalent to:
6 Answers
6
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Using margin:auto to vertically-align a div
...ly if we use margin:0 auto; . Should margin:auto auto; work how I think it should work? Centering it vertically as well?
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Error 908: Permission RECEIVE_SMS has been denied. - App Inventor 2 中...
这篇帖子是关于在MIT App Inventor中遇到错误908（权限接收短信）的讨论。一位用户遇到了这个问题，并询问是否有人知道如何解决。其他用户提供了一些可能的解决方案，包括检查应用程序权限设置、确保手机上的权限设置正确...
What is the fastest way to send 100,000 HTTP requests in Python?
...looked at the python concurrence library, but cannot figure out how to write this program correctly. Has anyone come across a similar problem? I guess generally I need to know how to perform thousands of tasks in Python as fast as possible - I suppose that means 'concurrently'.
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Tuples( or arrays ) as Dictionary keys in C#
...ictionaries, but that would probably not be very pretty to look at, though it is how I would do it in javascript.
8 Answers...
pythonw.exe or python.exe?
...follow
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edited Nov 13 '19 at 11:25
Sen Jacob
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