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req.body empty on posts

...of the 3 options available for content type select "X-www-form-urlencoded" and it should work. Also to get rid of error message replace: app.use(bodyParser.urlencoded()) With: app.use(bodyParser.urlencoded({ extended: true })); See https://github.com/expressjs/body-parser The 'body-parser' middl...
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Using Java 8's Optional with Stream::flatMap

The new Java 8 stream framework and friends make for some very concise java code, but I have come across a seemingly-simple situation that is tricky to do concisely. ...
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Find out how much memory is being used by an object in Python [duplicate]

...ject. One of the problems you may find is that Python objects - like lists and dicts - may have references to other python objects (in this case, what would your size be? The size containing the size of each object or not?). There are some pointers overhead and internal structures related to object ...
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TypeError: ObjectId('') is not JSON serializable

...an aggregated function on document using Python, It returns valid response and i can print it but can not return it. 16 Ans...
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UnicodeDecodeError: 'utf8' codec can't decode byte 0xa5 in position 0: invalid start byte

... The error is because there is some non-ascii character in the dictionary and it can't be encoded/decoded. One simple way to avoid this error is to encode such strings with encode() function as follows (if a is the string with non-ascii character): a.encode('utf-8').strip() ...
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Logical Operators, || or OR?

... no "better" but the more common one is ||. They have different precedence and || would work like one would expect normally. See also: Logical operators (the following example is taken from there): // The result of the expression (false || true) is assigned to $e // Acts like: ($e = (false || true...
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Underlining text in UIButton

... to underline the title of a UIButton ? I have a UIButton of Custom type, and I want the Title to be underlined, but the Interface Builder does not provide any option to do so. ...
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Html attributes for EditorFor() in ASP.NET MVC

...ou could always do it. Another option is to simply write a custom template and use TextBoxFor: <%= Html.TextBoxFor(model => model.Control.PeriodType, new { disabled = "disabled", @readonly = "readonly" }) %> ...
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Get the cartesian product of a series of lists?

...contains zero items--the cartesian product of at least one zero sized list and any other lists is an empty list, and that's exactly what this produces. – Ruzihm Oct 9 '19 at 20:42 ...
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How do SO_REUSEADDR and SO_REUSEPORT differ?

The man pages and programmer documentations for the socket options SO_REUSEADDR and SO_REUSEPORT are different for different operating systems and often highly confusing. Some operating systems don't even have the option SO_REUSEPORT . The WEB is full of contradicting information regarding th...