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How to convert hashmap to JSON object in Java
How to convert or cast hashmap to JSON object in Java, and again convert JSON object to JSON string?
29 Answers
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Is 1.0 a valid output from std::generate_canonical?
...alues happen to round up to IEEE 1.0f but that's just unavoidable when you cast them to IEEE floats. If you want pure mathematical results, use a symbolic computation system; if you are trying to use IEEE floating-point to represent numbers that are within eps of 1, you are in a state of sin.
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Check for null in foreach loop
...r and ForEach() which works faster than standard foreach loop.
You have to cast the collection to List though.
listOfItems?.ForEach(item => // ... );
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Can I Set “android:layout_below” at Runtime Programmatically?
...ike shortening code to 1 line, it makes it harder to read, especially when casting is involved. Plus doing it my way allows you to make further changes :)
– jackofallcode
Aug 15 '19 at 9:38
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Is there a NumPy function to return the first index of something in an array?
...o deal gracefully with multidimensional arrays (you would need to manually cast it to a tuple and it's not short-circuited) but it would fail if no match is found:
>>> tuple(np.argwhere(arr1 == 2)[0])
(2, 2, 2)
>>> tuple(np.argwhere(arr2 == 2)[0])
(5,)
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How can I pass a constant value for 1 binding in multi-binding?
...Converter, the parameters are passed as object, which means you would need cast the value to the correct type, in a safe way. IValueConverter.Convert
– benPearce
Jun 14 '18 at 1:32
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What is the difference between instanceof and Class.isAssignableFrom(…)?
...Yep, instanceof is a bytecode that uses essentially the same logic as checkcast (the bytecode behind casting). It will inherently be faster than the other options, regardless of degree of JITC optimization.
– Hot Licks
Jul 5 '13 at 0:11
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How do I format a Microsoft JSON date?
...t - the +a[1] etc represents the array pieces of the regex and the + would cast it to a number, so +a[1] equals 2009 etc. Here is the array breakdown: 0: "2009-04-12T20:44:55" 1: "2009" 2: "04" 3: "12" 4: "20" 5: "44" 6: "55"
– Jason Jong
Mar 25 at 11:57
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How to ignore the certificate check when ssl
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I'm using WebRequest, which gets cast to HttpWebRequest, such as: ((HttpWebRequest)request).Accept = contentType;
– B. Clay Shannon
Dec 29 '14 at 18:38
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How to round a number to n decimal places in Java
...hat he said to be honest. allocating objects is always more expensive than casting primitives and using static methods (Math.round() as opposed to decimalFormat.format()).
– Andi Jay
Jul 10 '12 at 14:35
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