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What does the arrow operator, '->', do in Java?
... he came across that code elsewhere. As to why IntelliJ isn't reporting an error, that's a mystery (perhaps there is a Java 7 version installed somewhere in OP's system). But that's a lambda expression's syntax in Java, there's no question about it.
– Óscar López
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Save classifier to disk in scikit-learn
...t)
>>> clf.score(digits.data, digits.target) # evaluate training error
0.9526989426822482
>>> filename = '/tmp/digits_classifier.joblib.pkl'
>>> _ = joblib.dump(clf, filename, compress=9)
>>> clf2 = joblib.load(filename)
>>> clf2
SGDClassifier(alpha=0....
How to generate and validate a software license key?
...g a product (developed in C#) that'll be available for downloading and installing for free but in a very limited version. To get access to all the features the user has to pay a license fee and receive a key. That key will then be entered into the application to "unlock" the full version.
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how to use javascript Object.defineProperty
...f not true, the property is read only; attempt to write is ignored without error*!
Both descriptors can have these members:
configurable - default false; if not true, the property can't be deleted; attempt to delete is ignored without error*!
enumerable - default false; if true, it will be iter...
从Code Review 谈如何做技术 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...。关于Code Review，你可以参看本站的《Code Review中的几个提示》
可见，Code Review直接关系到了你的工程能力！
Code Review 的问题
有下面几个情况会让你的Code Review没有效果。
首当其冲的是——“人员能力不足”，我经历过这样...
Django: multiple models in one template using forms [closed]
...his since 'and' short circuits and we want to check to whole page for form errors
if a_valid and b_valid and c_valid:
a = formA.save()
b = formB.save(commit=False)
c = formC.save(commit=False)
b.foreignkeytoA = a
b.save()
c.foreignkeytoB = b
...
How can I specify the base for Math.log() in JavaScript?
...
I've noticed some potential room for error here, probably having to do with floating point math. I just tried the function above with a value of 1000 in node, and got a result of 2.9999999999999996. (Although other numbers I tried, such as 10, 100, and even 1000...
Node.js create folder or use existing
...y. Callback is called after path is created or if path did already exists. Error err is set if mkdirp failed to create directory path.
var mkdirp = require('mkdirp');
mkdirp('/tmp/some/path/foo', function(err) {
// path exists unless there was an error
});
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Test if a command outputs an empty string
...ent that is being checked, otherwise empty results will result in a syntax error as there is no second argument (to check) given!
Note: that ls -la always returns . and .. so using that will not work, see ls manual pages. Furthermore, while this might seem convenient and easy, I suppose it will bre...
Use Expect in a Bash script to provide a password to an SSH command
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@erikb85 Usually, a package does all the dirty stuff for you, but, in all cases, these scripts are built just for that usage, then would be BETTER than add your own stuff. This comment is about don't reinvent the wheel. Deal with hard st...