大约有 15,900 项符合查询结果（耗时：0.0240秒） [XML]
Why do we use __init__ in Python classes?
...ill be a MyInteger), but we'll ignore now. In real code, we wouldn't; we'd test it to make sure, and maybe even coerce it ("you're not an integer? by golly, you have 10 nanoseconds to become one! 9... 8....")
We could even define fractions. Fractions also know how to add themselves.
class MyFracti...
Test if a variable is a list or tuple
In python, what's the best way to test if a variable contains a list or a tuple? (ie. a collection)
13 Answers
...
How do I set environment variables from Java?
...se in scenarios where you need to set specific environment values for unit tests, you might find the following hack useful. It will change the environment variables throughout the JVM (so make sure you reset any changes after your test), but will not alter your system environment.
I found that a co...
Ant: How to execute a command for each file in directory?
...s">
<include name="**/*.java"/>
<exclude name="**/*Test*"/>
</fileset>
</foreach>
</target>
<target name="bar">
<echo message="${theFile}"/>
</target>
This will antcall the target "bar" with the ${theFile} resulting in the cur...
PHP global in functions
...a tangled mess.
Reuse is severly hampered by all of the above. So is unit-testing.
Also, your function signatures are lying when you couple to the global scope
function fn()
is a liar, because it claims I can call that function without passing anything to it. It is only when I look at the funct...
eval command in Bash and its typical uses
... Take this (contrived) example:
# activate.sh
echo 'I got activated!'
# test.py
print("export foo=bar/baz/womp")
print(". activate.sh")
$ eval $(python test.py)
bash: export: `.': not a valid identifier
bash: export: `activate.sh': not a valid identifier
$ eval "$(python test.py)"
I got activate...
How to create a simple proxy in C#?
...modify all traffic. (Request and response).
As far as performance, I have tested it on my machine and works without any noticeable delay.
share
|
improve this answer
|
follo...
What's this =! operator? [duplicate]
...b;
if (a) {
// whatever
}
setting a to the logical inverse of b, and testing whether the result is true (or, equivalently, whether b was false).
Or it might be a mistyping of a != b.
share
|
...
Why is using 'eval' a bad practice?
...r a legitimate use-case for using eval, one that is found even in CPython: testing.
Here's one example I found in test_unary.py where a test on whether (+|-|~)b'a' raises a TypeError:
def test_bad_types(self):
for op in '+', '-', '~':
self.assertRaises(TypeError, eval, op + "b'a'")
...
Is the practice of returning a C++ reference variable evil?
...t() {
int i;
return i; // DON'T DO THIS.
}
That is all sorts of evil. The stack-allocated i will go away and you are referring to nothing. This is also evil:
int& getInt() {
int* i = new int;
return *i; // DON'T DO THIS.
}
Because now the client has to eventually do the st...