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Relationship between hashCode and equals method in Java [duplicate]
...istinct integers for distinct objects. (This is typically implemented by
converting the internal address of the object into an integer, but this implementation
technique is not required by the JavaTM programming language.)
However some time you want the hash code to be the same for different o...
pip install from git repo branch
...ackage is apache-airflow) to work with an unreleased version. I'd like to convert the call pip install apache-airflow[crypto, slack] to install these extras with the archive version. I tried pip install https://github.com/apache/incubator-airflow/archive/master.zip[crypto, slack] but this breaks t...
Best way to check for nullable bool in a condition expression (if …)
...en you are trying to evaluate a nullable bool in linq.
For example:
array.Select(v => v.nullableBool ?? false)
(from v in array where v.nullableBool ?? false)
Is cleaner in my opinion as opposed to:
array.Select(v => v.nullableBool.HasValue ? v.nullableBool.Value : false)
(from v in array wh...
Project management to go with GitHub [closed]
...outdated for my particular issue, as Google Code supports git now and I've converted Protocol Buffers to Mercurial anyway. However, it's still of general interest, IMO.)
...
std::cin input with spaces?
...(and tweak accordingly for multi-word input), or use getline and lexically convert to int after-the-fact.
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Which terminal command to get just IP address and nothing else?
...er some scenarios (i.e. a VPN link is up), so a more reliable way would be converting the result to an array and then loop over the elements:
ips=($(hostname -I))
for ip in "${ips[@]}"
do
echo $ip
done
OSX
On OSX, if you know the interface, you could use:
~$ ipconfig getifaddr en0
192.168....
Pass array to mvc Action via AJAX
... you just need to stringify your values. The JSONValueProvider in MVC will convert that back into an IEnumerable for you.
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One or more types required to compile a dynamic expression cannot be found. Are you missing referenc
...
On your solution explorer window, right click to References, select Add Reference, go to .NET tab, find and add Microsoft.CSharp.
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Best way to handle list.index(might-not-exist) in python?
...? :
li = [1,2,3,4,5] # create list
li = dict(zip(li,range(len(li)))) # convert List To Dict
print( li ) # {1: 0, 2: 1, 3: 2, 4:3 , 5: 4}
li.get(20) # None
li.get(1) # 0
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Determine if map contains a value for a key?
... the map for a keyvalue that is '2'. IIRC the C++ compiler will implicitly convert '2' to an int, which results in the numeric value for the ASCII code for '2' which is not what you want.
Since your keytype in this example is int you want to search like this: m.find(2);
...