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Skip a submodule during a Maven build
...ly, ie, if I have top/mod1/mod2, and build from top, -pl '!mod2' raises an error.
– zakmck
Dec 13 '19 at 18:31
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Python - write() versus writelines() and concatenated strings
...ou provide a list of strings, it will raise an exception (by the way, show errors to us!).
writelines(arg) expects an iterable as argument (an iterable object can be a tuple, a list, a string, or an iterator in the most general sense). Each item contained in the iterator is expected to be a string....
What is a None value?
...t recent call last):
File "<stdin>", line 1, in <module>
NameError: name 'F' is not defined
and that NameError means Python doesn't recognize the name F, because there is no such sticker. If Briggs were right and F = None resets F to its original state, then it should be there now, ...
Java generics type erasure: when and what happens?
...t;).
Despite that it makes generic arrays unusable and cause some strange errors for raw types:
List<String> l= List.<String>of("h","s");
List lRaw=l
l.add(new Object())
String s=l.get(2) //Cast Exception
it causes a lot of ambiguities as
void function(ArrayList<Integer> list...
What is the difference between encode/decode?
...call last):
File "<stdin>", line 1, in <module>
UnicodeEncodeError: 'ascii' codec can't encode character u'\xf6' in position 0:
ordinal not in range(128)
>>> s.encode('ascii')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
UnicodeEncodeEr...
Does Java 8 provide a good way to repeat a value or function?
...Core2Duo)
Benchmark Mode Samples Mean Mean error Units
c.s.q.SO18532488.ncopies thrpt 5 7.547 2.904 ops/s
c.s.q.SO18532488.range thrpt 5 0.317 0.064 ops/s
There is a fair amount of variance in the ncopies ...
What is a 'Closure'?
...rown away when the function outer exited. Calling fnc would have thrown an error because a no longer exists.
In JavaScript, the variable a persists because the variable scope is created when the function is first declared and persists for as long as the function continues to exist.
a belongs to th...
Class method differences in Python: bound, unbound and static
...Because of that, a call to your version of method_two will fail with a TypeError
>>> a_test = Test()
>>> a_test.method_two()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: method_two() takes no arguments (1 given)
You can change...
How does Bluebird's util.toFastProperties function make an object's properties “fast”?
...tProperties(obj) {
/*jshint -W027*/ // suppress the "unreachable code" error
function f() {} // declare a new function
f.prototype = obj; // assign obj as its prototype to trigger the optimization
// assert the optimization passes to prevent the code from breaking in the
// futur...
How to call an external command?
...e flexible (you can get the stdout, stderr, the "real" status code, better error handling, etc...).
The official documentation recommends the subprocess module over the alternative os.system():
The subprocess module provides more powerful facilities for spawning new processes and retrieving the...