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What does a tilde do when it precedes an expression?
... converts its operand to a 32 bit integer (bitwise operators in JavaScript do that)...
0000 0000 0000 0000 0000 0000 0000 0001
If it were a negative number, it'd be stored in 2's complement: invert all bits and add 1.
...and then flips all its bits...
1111 1111 1111 1111 1111 1111 1111 1110
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How to print out more than 20 items (documents) in MongoDB's shell?
won't do it. It still prints out only 20 documents.
6 Answers
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What do I need to read to understand how git works? [closed]
...hitects point of view. How are files stored, how are versions kept and how do changes happen (branches, merges, etc.)?
15 A...
How do I escape a single quote?
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Why should one use double quotes for attribute values?
– Gumbo
Mar 11 '10 at 20:59
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Long-held, incorrect programming assumptions [closed]
I am doing some research into common errors and poor assumptions made by junior (and perhaps senior) software engineers.
19...
How do I typedef a function pointer with the C++11 using syntax?
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How about this syntax for clarity? (Note double parenthesis)
void func();
using FunctionPtr = decltype((func));
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Why does Math.floor return a double?
Official Javadoc says that Math.floor() returns a double that is "equal to a mathematical integer", but then why shouldn't it return an int ?
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In a Django form, how do I make a field readonly (or disabled) so that it cannot be edited?
In a Django form, how do I make a field read-only (or disabled)?
26 Answers
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Weird PHP error: 'Can't use function return value in write context'
...'m pretty sure that's legal in later PHP versions like 5.6, but I think it doesn't in 5.3
– UnsettlingTrend
Dec 8 '16 at 16:14
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How to iterate over a JavaScript object?
...ject[key]);
}
With ES6, if you need both keys and values simultaneously, do
for (let [key, value] of Object.entries(yourobject)) {
console.log(key, value);
}
To avoid logging inherited properties, check with hasOwnProperty :
for (let key in yourobject) {
if (yourobject.hasOwnProperty(ke...