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Covariance, Invariance and Contravariance explained in plain English?
...ring>();
will not compile in Java, but
Object[] objects = new String[1];
will.
Another example where the subtype relation matters is a method invocation expression:
result = method(a);
Informally speaking, this statement is evaluated by assigning the value of a to the method's first para...
How to handle a lost KeyStore password in Android?
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Remove the first character of a string
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317
python 2.x
s = ":dfa:sif:e"
print s[1:]
python 3.x
s = ":dfa:sif:e"
print(s[1:])
both pri...
How can I get the MD5 fingerprint from Java's keytool, not only SHA-1?
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10 Answers
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What's the most efficient way to erase duplicates and sort a vector?
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I agree with R. Pate and Todd Gardner; a std::set might be a good idea here. Even if you're stu...
How to “pretty” format JSON output in Ruby on Rails
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java.net.UnknownHostException: Invalid hostname for server: local
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Crontab Day of the Week syntax
In crontab does the Day of the Week field run from 0 - 6 or 1 -7 ?
3 Answers
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Get querystring from URL using jQuery [duplicate]
...ar hashes = window.location.href.slice(window.location.href.indexOf('?') + 1).split('&');
for(var i = 0; i < hashes.length; i++)
{
hash = hashes[i].split('=');
vars.push(hash[0]);
vars[hash[0]] = hash[1];
}
return vars;
}
For example, if you have the ...