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Random hash in Python
...question:
import random, string
def random_md5like_hash():
available_chars= string.hexdigits[:16]
return ''.join(
random.choice(available_chars)
for dummy in xrange(32))
I'm not saying it's faster or preferable to any other answer; just that it's another approach :)
...
Random “Element is no longer attached to the DOM” StaleElementReferenceException
... typing in your text inside the input element. The solution is to send one character at a time and search again for the input element. (Ex. in ruby shown below)
def send_keys_eachchar(webdriver, elem_locator, text_to_send)
text_to_send.each_char do |char|
input_elem = webdriver.find_element(e...
C++静态和多态，亦敌亦友 - C/C++ - 清泛网 - 专注C/C++及内核技术
...(void){ cout << "DerivedAgain::foo()"<< endl; }
} ;
int main(int argc, char** argv)
{
DerivedAgain da;
Base* pB = &da;
da.foo();
pB->foo();
return 0;
}
上述代码运行结果是什么？等等，你确定上述代码能通过编译？在笔者Ubuntu 12.04 + gcc...
What are POD types in C++?
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POD types have characteristics that non-POD types do not. For example, if you have a global, const, POD-type struct, you can initialize its contents with brace notation, it is put into read-only memory, and no code needs to be generated to...
What do 'real', 'user' and 'sys' mean in the output of time(1)?
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(Ran out of chars in the prev comment so): More detail? Use perf [1], [2]. [1] perf.wiki.kernel.org/index.php/Main_Page [2] brendangregg.com/perf.html
– kaiwan
May 9 '15 at 7:46
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MySQL error: key specification without a key length
I have a table with a primary key that is a varchar(255). Some cases have arisen where 255 characters isn't enough. I tried changing the field to a text, but I get the following error:
...
In C, do braces act as a stack frame?
...stack frame. Otherwise, you would not be able to do something like this:
char var = getch();
{
char next_var = var + 1;
use_variable(next_char);
}
If curly braces caused a true stack push/pop (like a function call would), then the above code would not compile because the ...
How to check for valid email address? [duplicate]
...TLD to alphanumeric right now (still haven't seen a TLD that has non-ASCII chars). Using this now: re.compile(r"[^@\s]+@[^@\s]+\.[a-zA-Z0-9]+$")
– gaefan
Aug 29 '15 at 15:39
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Ruby: How to get the first character of a string
How can I get the first character in a string using Ruby?
13 Answers
13
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Type erasure techniques
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I would also consider (similar to void*) the use of "raw storage": char buffer[N].
In C++0x you have std::aligned_storage<Size,Align>::type for this.
You can store anything you want in there, as long as it's small enough and you deal with the alignment properly.
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