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How to get subarray from array?
...[attr];
}
return copy;
}
// With the `clone()` function, you can now do the following:
Array.prototype.subarray = function(start, end) {
if (!end) {
end = this.length;
}
const newArray = clone(this);
return newArray.slice(start, end);
};
// Without a copy you will ...
How to add a progress bar to a shell script?
... (100%)\r'
echo -ne '\n'
In a comment below, puk mentions this "fails" if you start with a long line and then want to write a short line: In this case, you'll need to overwrite the length of the long line (e.g., with spaces).
...
See :hover state in Chrome Developer Tools
...
Now you can see both the pseudo-class rules and force them on elements.
To see the rules like :hover in the Styles pane click the small :hov text in the top right.
To force an element into :hover state, right click it an...
How to find keys of a hash?
I know in javascript Objects double as hashes but i have been unable to find a built in function to get the keys
9 Answers...
how to File.listFiles in alphabetical order?
...
Ok, now you justify why it's simpler if you just want to print the results so I will remove my downvote.
– zelanix
Feb 18 '14 at 16:19
...
Flatten nested dictionaries, compressing keys
...ems = []
for k, v in d.items():
new_key = parent_key + sep + k if parent_key else k
if isinstance(v, collections.MutableMapping):
items.extend(flatten(v, new_key, sep=sep).items())
else:
items.append((new_key, v))
return dict(items)
>>&g...
Is it possible to get the non-enumerable inherited property names of an object?
...etOwnPropertyNames(curr)
props.forEach(function(prop){
if (allProps.indexOf(prop) === -1)
allProps.push(prop)
})
}while(curr = Object.getPrototypeOf(curr))
return allProps
}
I tested that on Safari 5.1 and got
> getAllProperties([1,2,3])
["0"...
Macro vs Function in C
...le with control-flow constructs:
#define swap(x, y) t = x; x = y; y = t;
if (x < y) swap(x, y); -->
if (x < y) t = x; x = y; y = t; --> if (x < y) { t = x; } x = y; y = t;
The usual strategy for fixing this is to put the statements inside a "do { ... } while (0)" loop.
If you hav...
理解Python的 with 语句 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...ese are useful in exception handling. Let’s see how this works by modifying the above example.
正如你看到的， 1. __enter__()方法被执行 2. __enter__()方法返回的值 - 这个例子中是"Foo"，赋值给变量'sample' 3. 执行代码块，打印变量"sample"的值为 "Foo" 4. _...
Can I protect against SQL injection by escaping single-quote and surrounding user input with single-
...F that you wrote to the only version I could find online... please let us know if there's another location for your paper.
– Michael Fredrickson
Dec 17 '14 at 17:59
...