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TypeError: unhashable type: 'dict'
... {"a": "b"}
>>> some_dict[dict_key] = True
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: unhashable type: 'dict'
To use a dict as a key you need to turn it into something that may be hashed first. If the dict you wish to use as key consist...
What does java.lang.Thread.interrupt() do?
...ing interruptible file I/O, the effect will not be that gentle. You'll typically get file corruption.
– Marko Topolnik
Nov 6 '16 at 18:01
...
A positive lambda: '+[]{}' - What sorcery is this? [duplicate]
...aving the same parameter and return types as the closure type’s function call operator. The value returned by this conversion function shall be the address of a function that, when invoked, has the same effect as invoking the closure type’s function call operator.
This is important as the unary...
center aligning a fixed position div
...d in some old browsers. And we don't even need to set a fixed or relative width.
.centered {
position: fixed;
left: 50%;
transform: translate(-50%, 0);
}
Working jsfiddle comparison here.
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...
Fixed page header overlaps in-page anchors
...
@Tomalak Be aware that this solution makes links inside the padding area non-clickable. To fix this you must use z-index, and set the links value higher than the anchor's. Remember you topbar should have the highest z-index value, so the page's content don't float ontop of the...
What are the basic rules and idioms for operator overloading?
... itself succeeded, but the result is not what would be expected.
Function call operator
The function call operator, used to create function objects, also known as functors, must be defined as a member function, so it always has the implicit this argument of member functions. Other than this, it ca...
Replace comma with newline in sed on MacOS?
I have a file of id's that are comma separated. I'm trying to replace the commas with a new line. I've tried:
13 Answers
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Detecting an “invalid date” Date instance in JavaScript
...
Here's how I would do it:
if (Object.prototype.toString.call(d) === "[object Date]") {
// it is a date
if (isNaN(d.getTime())) { // d.valueOf() could also work
// date is not valid
} else {
// date is valid
}
} else {
// not a date
}
Update [2018-05-31]: If yo...
Is it possible to capture a Ctrl+C signal and run a cleanup function, in a “defer” fashion?
...outine to get processor time to handle the signal, the main goroutine must call a blocking operation or call runtime.Gosched in an appropriate place (in your program's main loop, if it has one)
– misterbee
Aug 4 '13 at 15:53
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What is the purpose of wrapping whole Javascript files in anonymous functions like “(function(){ … }
...ction() {
function innerFunction() {
// code
}
}
Now you can call outerFunction(), but the visiblity of innerFunction() is limited to the scope of outerFunction(), meaning it is private to outerFunction(). It basically follows the same principle as variables in Javascript:
var globalV...