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Elegant Python function to convert CamelCase to snake_case?
...er()
'get2_http_response_code'
>>> a.sub(r'_\1', 'get2HTTPResponse123Code').lower()
'get2_http_response123_code'
>>> a.sub(r'_\1', 'HTTPResponseCode').lower()
'http_response_code'
>>> a.sub(r'_\1', 'HTTPResponseCodeXYZ').lower()
'http_response_code_xyz'
It all depends on...
printf with std::string?
...r example:
std::locale loc("");
std::cout.imbue(loc);
std::cout << 123456.78;
The nameless locale (the "") picks a locale based on the user's configuration. Therefore, on my machine (configured for US English) this prints out as 123,456.78. For somebody who has their computer configured fo...
Practical usage of setjmp and longjmp in C
...)\n");
r = setjmp(bufferA);
if (r == 0) routineB();
printf("(A2) r=%d\n",r);
r = setjmp(bufferA);
if (r == 0) longjmp(bufferB, 20001);
printf("(A3) r=%d\n",r);
r = setjmp(bufferA);
if (r == 0) longjmp(bufferB, 20002);
printf("(A4) r=%d\n",r);
}
void routine...
How do I parse a string into a number with Dart?
...ing into an integer with int.parse(). For example:
var myInt = int.parse('12345');
assert(myInt is int);
print(myInt); // 12345
Note that int.parse() accepts 0x prefixed strings. Otherwise the input is treated as base-10.
You can parse a string into a double with double.parse(). For example:
va...
How long does it take for GitHub page to show changes after changing index.html
...st it (or break a cache) you can append a query string like myfile.jpg?ver=123 and every time you update the string the cache will bust, and you can verify that the CDN is updating.
– Joel Glovier
Dec 19 '16 at 14:10
...
Dynamically set local variable [duplicate]
...ess the function locals through it:
>>> def foo():
... abc = 123
... lcl = zzz()
... lcl['abc'] = 456
... deF = 789
... print(abc)
... print(zzz())
... print(lcl)
...
>>> zzz =locals
>>> foo()
123
{'__doc__': None, '__builtins__': <module '_...
How can I remove a character from a string using Javascript?
...et of charcters> could be characters described by a character class:
/[123!y]/
//any one of these
/[^123!y]/
//anything but one of the chars following '^' (very useful/performance enhancing btw)
Or expanded on to match a quantity of characters (but still best to think of as a single element in...
Round to at most 2 decimal places (only if necessary)
...
If the value is a text type:
parseFloat("123.456").toFixed(2);
If the value is a number:
var numb = 123.23454;
numb = numb.toFixed(2);
There is a downside that values like 1.5 will give "1.50" as the output. A fix suggested by @minitech:
var numb = 1.5;
numb = +nu...
Using reflect, how do you set the value of a struct field?
...oo struct {
Number int
Text string
}
func main() {
foo := Foo{123, "Hello"}
fmt.Println(int(reflect.ValueOf(foo).Field(0).Int()))
reflect.ValueOf(&foo).Elem().Field(0).SetInt(321)
fmt.Println(int(reflect.ValueOf(foo).Field(0).Int()))
}
Prints:
123
321
...
Using str_replace so that it only acts on the first match?
...n preg_replace($from, $to, $content, 1);
}
echo str_replace_first('abc', '123', 'abcdef abcdef abcdef');
// outputs '123def abcdef abcdef'
The magic is in the optional fourth parameter [Limit]. From the documentation:
[Limit] - The maximum possible
replacements for each pattern in each
s...