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How to efficiently concatenate strings in go
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If you have a string slice that you want to efficiently convert to a string then you can use this approach. Otherwise, take a look at the other answers.
There is a library function in the strings package called Join:
http://golang.org/pkg/strings/#Join
A look at the code of Join s...
Calculate distance between 2 GPS coordinates
...s and seconds are out of 60 so S31 30' is -31.50 degrees.
Don't forget to convert degrees to radians. Many languages have this function. Or its a simple calculation: radians = degrees * PI / 180.
function degreesToRadians(degrees) {
return degrees * Math.PI / 180;
}
function distanceInKmBetwe...
Using current time in UTC as default value in PostgreSQL
...low link and search the page for UTC. On input, a timestamp with time zone converts the incoming value to utc and stores that value WITH NO TIME ZONE OR OFFSET INFORMATION. On output, the stored utc value is converted to a local time using time zone of the client if available. This type is all abou...
High Quality Image Scaling Library [closed]
...1 this works brilliantly! One issue you need to correct in this code is to convert the quality variable to a long prior to passing it to the encoder param or you will get a invalid parameter runtime exception.
– James
Aug 4 '10 at 18:00
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Read .mat files in Python
...efile.mat','r')
data = f.get('data/variable1')
data = np.array(data) # For converting to a NumPy array
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Can someone give an example of cosine similarity, in a very simple, graphical way?
... are 8-dimensional. A virtue of using cosine similarity is clearly
that it converts a question that is beyond human ability to visualise to one
that can be. In this case you can think of this as the angle of about 35
degrees which is some 'distance' from zero or perfect agreement.
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Python add item to the tuple
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However if you note to OP to convert to list at the beginning, append items, and then at the very end convert to tuple then this is the best solution +1
– jamylak
May 24 '13 at 9:04
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Go > operators
... nice answer, I binary shifting seemed troublesome at first but converting the value to decimal with powers to 2 helps well to get it
– minhajul
Aug 20 '18 at 6:46
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How should one use std::optional?
... paper: N3672, std::optional:
optional<int> str2int(string); // converts int to string if possible
int get_int_from_user()
{
string s;
for (;;) {
cin >> s;
optional<int> o = str2int(s); // 'o' may or may not contain an int
if (o) { ...
Passing enum or object through an intent (the best solution)
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For passing an enum by intent, you can convert enum into integer.
Ex:
public enum Num{A ,B}
Sending(enum to integer):
Num send = Num.A;
intent.putExtra("TEST", send.ordinal());
Receiving(integer to enum):
Num rev;
int temp = intent.getIntExtra("TEST", -1);...