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How to dynamically build a JSON object with Python?
...and I'm intentionally using this to demonstrate how you can store null and convert it to json null)
import json
print('serialization')
myDictObj = { "name":"John", "age":30, "car":None }
##convert object to json
serialized= json.dumps(myDictObj, sort_keys=True, indent=3)
print(serialized)
## now we...
How can I calculate the time between 2 Dates in typescript
...culate the difference you have to put the + operator,
that way typescript converts the dates to numbers.
+new Date()- +new Date("2013-02-20T12:01:04.753Z")
From there you can make a formula to convert the difference to minutes or hours.
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Python serialization - Why pickle?
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Pickling is a way to convert a python object (list, dict, etc.) into a character stream. The idea is that this character stream contains all the information necessary to reconstruct the object in another python script.
As for where the pickled i...
what is the unsigned datatype?
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unsigned really is a shorthand for unsigned int, and so defined in standard C.
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java.util.Date vs java.sql.Date
...What I am saying that save the milliseconds/nanoseconds as plain longs and convert them to whatever objects you are using (obligatory joda-time plug). One hacky way which can be done is to store the date component as one long and time component as another, for example right now would be 20100221 and...
Check if two lists are equal [duplicate]
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Slow and doesn't handle duplicates. [1, 1, 2] != [1, 2, 2]
– CodesInChaos
Mar 4 '14 at 15:42
1
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How to initialize a private static const map in C++?
...occur if I remove the const qualifiers, so I guess map's operator[] can't handle a const map, at least, not in the g++ implementation of the C++ library.
– Craig McQueen
Oct 31 '13 at 1:08
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How to disable / enable dialog negative positive buttons?
...e look at the custom dialog below. I have an edittext field on the dialog and if the text field is empty I would like to disable the positiveButton . I can get a charListener for the text field but I am not sure how I am going to set the positivebutton to disable or enable from that listener? Wh...
When to use NSInteger vs. int
...nteger/NSUInteger are defined as *dynamic typedef*s to one of these types, and they are defined like this:
#if __LP64__ || TARGET_OS_EMBEDDED || TARGET_OS_IPHONE || TARGET_OS_WIN32 || NS_BUILD_32_LIKE_64
typedef long NSInteger;
typedef unsigned long NSUInteger;
#else
typedef int NSInteger;
typedef ...
Constant pointer vs Pointer to constant [duplicate]
...erally I would prefer the declaration like this which make it easy to read and understand (read from right to left):
int const *ptr; // ptr is a pointer to constant int
int *const ptr; // ptr is a constant pointer to int
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