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How to asynchronously call a method in Java
...nied by SecurityManager.
FutureTask is a good option as the other options from the java.util.concurrent package.
My favorite for simple tasks:
Executors.newSingleThreadExecutor().submit(task);
little bit shorter than creating a Thread (task is a Callable or a Runnable)
...
git - Find commit where file was added
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How does this work on files that are merged from other branches, but which weren't necessarily added to the branch being merged by the user performing the merge?
– g33kz0r
Jan 22 '14 at 18:47
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What does the JSLint error 'body of a for in should be wrapped in an if statement' mean?
...his field really belongs to the object itself or if it is simply inherited from the prototype chain and thus belongs to all the objects of that type.
for (o in listeners) {
if (listeners.hasOwnProperty(o)) {
console.log(o);
}
}
//prints:
// 0
// 1
// 2
Note, that although th...
How to convert a private key to an RSA private key?
Let me explain my question first. I bought a certificate from a CA and used the following format to generate the csr and the private key:
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What's the difference between belongs_to and has_one?
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That is pretty much the same the accepted answer from two years ago already states.
– matthias krull
Oct 5 '12 at 18:26
11
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Why are my basic Heroku apps taking two seconds to load?
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If your application is unused for a while it gets unloaded (from the server memory).
On the first hit it gets loaded and stays loaded until some time passes without anyone accessing it.
This is done to save server resources. If no one uses your app why keep resources busy and not...
Pandas percentage of total with groupby
... the sales column by its sum. Copying the beginning of Paul H's answer:
# From Paul H
import numpy as np
import pandas as pd
np.random.seed(0)
df = pd.DataFrame({'state': ['CA', 'WA', 'CO', 'AZ'] * 3,
'office_id': list(range(1, 7)) * 2,
'sales': [np.random.rand...
How are software license keys generated?
...to disassemble our released application and produce a working “keygen” from it. This means that our application will not fully test a key for verification. Only some of the key is to be tested. Further, each release of the application should test a different portion of the key, so that a phony k...
Deleting a resource using http DELETE
... all these debates. But that specs has been superseded by RFC 7231. Quoted from RFC 7231, section 4.2.2 Idempotent Methods, emphasis mine:
A request method is considered "idempotent" if the intended EFFECT ON
THE SERVER of multiple identical requests with that method is the
same as the effec...
In Objective-C, what is the equivalent of Java's “instanceof” keyword?
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From Wikipedia:
In Objective-C, for example, both the
generic Object and NSObject (in
Cocoa/OpenStep) provide the method
isMemberOfClass: which returns true if
the argument to the method is an
instance of the sp...