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Difference between DateTime and Time in Ruby
..."
irb(main):008:0> dt.dst?
NoMethodError: undefined method `dst?' for #<DateTime:0x007f34ea6c3cb8>
This may cause trouble when times are entered as DST and then converted into a non-DST time zone without keeping track of the correct offsets outside of DateTime itself (many operating syste...
Why is 'this' a pointer and not a reference?
...
And, if this were a reference, it would be difficult to overload operator & to do anything useful. There would have to be some special syntax for getting the address of this that wouldn't go through operator &.
– Omnifarious
Ja...
Specifically, what's dangerous about casting the result of malloc?
... that the implicit declaration (int malloc(int)) is incompatible to the built-in malloc. So gcc seems to know malloc even without stdlib.h.
Leaving out the cast to prevent this error is mostly the same reasoning as writing
if (0 == my_var)
instead of
if (my_var == 0)
since the latter could le...
What is the id( ) function used for?
...nstant for this object during its lifetime." (Python Standard Library - Built-in Functions) A unique number. Nothing more, and nothing less. Think of it as a social-security number or employee id number for Python objects.
Is it the same with memory addresses in C?
Conceptually, yes, in that ...
Why should hash functions use a prime number modulus?
...$1.25. In it, the explanation for a hashing function said that it should ultimately mod by a prime number because of "the nature of math".
...
How to perform mouseover function in Selenium WebDriver using Java?
...omething) are executed before anything else (that's the only way their result can be passed on to moveElement). At that time the second element that you want to find isn't visible yet because the first one still has to be hovered over. To fix this, as you said, you can insert intermediate .perform()...
emacs/elisp: What is the hash (pound, number sign, octothorp) symbol used for?
... is used in the printed representation along with the left angle bracket (<) to indicate that the object printed is a description (but cannot be read). For example:
#<buffer foo.txt>
It is also used in constructs by the reader to represent circular structures. See the docs for Read Syn...
Use “ENTER” key on softkeyboard instead of clicking button
...CourseFromTextBox();
return true;
default:
break;
}
}
return false;
}
});
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...
How can I read a text file in Android?
...ng[] strings = TextUtils.split(line, "-");
if (strings.length < 2)
continue;
long id = addWord(strings[0].trim(), strings[1].trim());
if (id < 0) {
Log.e(TAG, "unable to add word: " + strings[0].trim());
}
...
Kill a Process by Looking up the Port being used by it from a .BAT
...e a command string, you would use | instead of ^|.
findstr :8080
This filters any output that is passed into it, returning only lines that contain :8080.
TaskKill.exe /PID <value>
This kills a running task, using the process ID.
%%P instead of %P
This is required in batch files. If y...