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Convert JsonNode into POJO
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In Jackson 2.4, you can convert as follows:
MyClass newJsonNode = jsonObjectMapper.treeToValue(someJsonNode, MyClass.class);
where jsonObjectMapper is a Jackson ObjectMapper.
In older versions of Jackson, it would be
MyClass newJsonNode = jso...
How to convert CharSequence to String?
How can I convert a Java CharSequence to a String ?
3 Answers
3
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Calling Python in Java?
...nterpreter interpreter = new PythonInterpreter();
interpreter.exec("import sys\nsys.path.append('pathToModules if they are not there by default')\nimport yourModule");
// execute a function that takes a string and returns a string
PyObject someFunc = interpreter.get("funcName");
PyObject result = so...
Spring MVC: Complex object as GET @RequestParam
...eturns the following error for request mentioned in answer:
"Failed to convert value of type 'java.lang.String[]' to required type
'java.lang.Long[]'; nested exception is
java.lang.NumberFormatException: For input string: \"353,234\""
The data class will work only for the following request...
HTML character decoding in Objective-C / Cocoa Touch
...hould be substituted.” More like character. This is text, not data; upon converting the text to data, the character may occupy multiple bytes, depending on the character and the encoding.
– Peter Hosey
Jul 9 '09 at 18:17
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Convert data.frame column to a vector?
I have a dataframe such as:
11 Answers
11
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Convert Django Model object to dict with all of the fields intact
How does one convert a Django Model object to a dict with all of its fields? All ideally includes foreign keys and fields with editable=False .
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Remove insignificant trailing zeros from a number?
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If you convert it to a string it will not display any trailing zeros, which aren't stored in the variable in the first place since it was created as a Number, not a String.
var n = 1.245000
var noZeroes = n.toString() // "1.245"
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PostgreSQL return result set as JSON array?
...ion describes how to generate a JSON array of objects, with each row being converted to a single object. The result looks like this:
[{"a":1,"b":"value1"},{"a":2,"b":"value2"},{"a":3,"b":"value3"}]
9.3 and up
The json_agg function produces this result out of the box. It automatically figures out...
Python list subtraction operation
... @BarnabasSzabolcs: That won't save a thing, because it will convert y to a set before every check (which is similar cost to original work). You'd need to either do yset = set(y) outside the listcomp, then test if item not in yset, or as an egregious hack, do [item for yset in [set(y)]...