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How to convert UTF-8 byte[] to string?
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LINQ it: var decBytes2 = str.Split('-').Select(ch => Convert.ToByte(ch, 16)).ToArray();
– drtf
Jul 13 '14 at 14:43
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Filter dataframe rows if value in column is in a set list of values [duplicate]
...id 7
9 1980-01-10 9 Jones 4
There are multiple ways of selecting or slicing the data.
Using .isin
The most obvious is the .isin feature. You can create a mask that gives you a series of True/False statements, which can be applied to a dataframe like this:
mask = df['STK_ID'].isin...
Can javax.persistence.Query.getResultList() return null?
... places. Especially as the documentation for getResultList reads Execute a SELECT query and return the query results as a(n) (un)typed List. - @return a list of the results. I'd still check for null of course and return an empty list myself if needed.
– René
J...
How do I create a unique constraint that also allows nulls?
...dy found separately in other, properly defined columns. It should never be selected or used.
So, my story is that this is not a surrogate NULL, and I'm sticking to it! Since we don't actually want the non-NULL value for any purpose other than to trick the UNIQUE index to ignore NULLs, our use case ...
Auto increment in phpmyadmin
...e on the pop-up window, scroll left and check A_I. Also make sure you have selected None for Default
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require file as string
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The selected answer is deprecated and not recommended anymore.
NodeJS documentation suggests other approaches like:
loading modules via some other Node.js program
but it does not expand any more.
You can use a very simple libr...
RandomForestClassifier vs ExtraTreesClassifier in scikit learn
...he random forest), for each feature under consideration, a random value is selected for the split (for the extra trees). Here is a good resource to know more about their difference in more detail Random forest vs extra tree.
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How to find the array index with a value?
...t",
"subject": "chemistry"
},
];
Now if we have a requirement to select a particular object in the array. Let us assume that we want to find index of student with name Tanmay.
We can do that by iterating through the array and comparing value at the given key.
function functiontofindIndex...
Not showing placeholder for input type=“date” field
...format while the input is focused (for people who type the date instead of selecting)
– Marco somefox
Apr 30 at 14:05
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How to install Maven 3 on Ubuntu 18.04/17.04/16.10/16.04 LTS/15.10/15.04/14.10/14.04 LTS/13.10/13.04
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Use this command to select the correct version of maven after it's been installed: sudo update-alternatives --config mvn
– mogsie
Nov 1 '13 at 11:46
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