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SSL Error: CERT_UNTRUSTED while using npm command

I am trying to install express framework using npm command but getting following error. 7 Answers ...
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Waiting until two async blocks are executed before starting another block

... NSLog(@"Block3"); }); // only for non-ARC projects, handled automatically in ARC-enabled projects. dispatch_release(group); and could produce output like this: 2012-08-11 16:10:18.049 Dispatch[11858:1e03] Block1 2012-08-11 16:10:18.052 Dispatch[11858:1d03] Block2 2012-08-11 16:10:23.051 Dis...
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How to prevent a click on a '#' link from jumping to top of page?

...edirect at the moment. Preventing default behavior of action not needed at all is a kind of advice like: take the knife, grab the blade and hammer the nails using the handle :) Take a right tool for the job! – takeshin Jul 15 '10 at 7:14 ...
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What does $_ mean in PowerShell?

... This is the variable for the current value in the pipe line, which is called $PSItem in Powershell 3 and newer. 1,2,3 | %{ write-host $_ } or 1,2,3 | %{ write-host $PSItem } For example in the above code the %{} block is called for every value in the array. The $_ or $PSItem variable ...
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Receive JSON POST with PHP

...ontents('php://input'), true); This will save you the hassle of changing all $_POST to something else and allow you to still make normal post requests if you wish to take this line out. share | im...
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Java: difference between strong/soft/weak/phantom reference

I have read this article about the topic, but I don't really understand it. Please give me some advice along with examples when describing the concepts. ...
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Why does this iterative list-growing code give IndexError: list assignment index out of range?

...or l in i: j.append(l) Of course, you'd never do this in practice if all you wanted to do was to copy an existing list. You'd just do: j = list(i) Alternatively, if you wanted to use the Python list like an array in other languages, then you could pre-create a list with its elements set to ...
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How to pass optional arguments to a method in C++?

... do_something(); else do_something_else(); } you can call myfunc in both ways and both are valid myfunc(10); // Mode will be set to default 0 myfunc(10, 1); // Mode will be set to 1 share ...
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How to request Google to re-crawl my website? [closed]

... you can follow the directions to submit a sitemap. Your second (and generally slower) option is, as seanbreeden pointed out, submitting here: http://www.google.com/addurl/ Update 2019: Login to - Google Search Console Add a site and verify it with the available methods. After verification from ...
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Mocking vs. Spying in mocking frameworks

...ate spies of real objects. When you use the spy then the real methods are called (unless a method was stubbed). Real spies should be used carefully and occasionally, for example when dealing with legacy code. When in doubt, use mocks. ...