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Python __call__ special method practical example
...he following is code I wrote yesterday that makes a version of the hashlib.foo methods that hash entire files rather than strings:
# filehash.py
import hashlib
class Hasher(object):
"""
A wrapper around the hashlib hash algorithms that allows an entire file to
be hashed in a chunked m...
Easiest way to convert int to string in C++
...icking up a discussion with @v.oddou a couple of years later, C++17 has finally delivered a way to do the originally macro-based type-agnostic solution (preserved below) without going through macro uglyness.
// variadic template
template < typename... Args >
std::string sstr( Args &&....
How does having a dynamic variable affect performance?
...
void M()
{
dynamic d1 = whatever;
dynamic d2 = d1.Foo();
then the compiler will generate code that is morally like this. (The actual code is quite a bit more complex; this is simplified for presentation purposes.)
class C
{
static DynamicCallSite FooCallSite;
void...
C# 4 default parameter values: How to assign a default DateTime/object value? [duplicate]
... you can't fake it with attributes.
.method private hidebysig static void foo([opt] int32 x) cil managed
{
.param [1] = int32(5)
.maxstack 8
L_0000: nop
L_0001: ret
}
.method //this is a new method
private hidebysig static //it is private, ???, and static
void foo //it returns...
How to print out more than 20 items (documents) in MongoDB's shell?
...
From the shell if you want to show all results you could do db.collection.find().toArray() to get all results without it.
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Breakpoint on property change
... in Firefox, you can watch for changes natively:
>>> var obj = { foo: 42 }
>>> obj.watch('foo', function() { console.log('changed') })
>>> obj.foo = 69
changed
69
However, this will be soon (late 2017) removed.
...
Insert line after first match using sed
...
Note the standard sed syntax (as in POSIX, so supported by all conforming sed implementations around (GNU, OS/X, BSD, Solaris...)):
sed '/CLIENTSCRIPT=/a\
CLIENTSCRIPT2="hello"' file
Or on one line:
sed -e '/CLIENTSCRIPT=/a\' -e 'CLIENTSCRIPT2="hello"' file
(-expressions (and t...
Get __name__ of calling function's module in Python
Suppose myapp/foo.py contains:
3 Answers
3
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Passing a list of kwargs?
... another function's kwargs. Consider this code: (newlines don't seem to be allowed in comments) def a(**kw): print(kw), and def b(**kw): a(kw). This code will generate an error because kwargs is actually a dictionary, and will be interpreted as a regular argument of the dict type. Which is why chang...
Dynamic Anonymous type in Razor causes RuntimeBinderException
...bout nested dynamic properties? they will continue to be dynamic... eg: `{ foo: "foo", nestedDynamic: { blah: "blah" } }
– sports
Feb 24 '15 at 18:21
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