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Return a `struct` from a function in C
...nk this feature was already common during the eighties or early nineties.
Arrays, however, can still be passed and returned only as pointers.
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Use of .apply() with 'new' operator. Is this possible?
...aa80 My bad, reverted my edit. I tested new (Function.prototype.bind.apply(Array, [1,2,3]));, but forgot that your newCall function already receives a cls argument.
– Rob W
Mar 23 '12 at 14:00
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Rails 4: List of available datatypes
... PostgreSQL, you can also take advantage of these:
:hstore
:json
:jsonb
:array
:cidr_address
:ip_address
:mac_address
They are stored as strings if you run your app with a not-PostgreSQL database.
Edit, 2016-Sep-19:
There's a lot more postgres specific datatypes in Rails 4 and even more in Rai...
Is there any particular difference between intval and casting to int - `(int) X`?
...to sanitize integers for inclusion into a SQL IN() clause by passing it to array_map. Here is an example:
$ids = implode(",", array_map('intval', $_POST['array_of_integers']));
$sql = "SELECT * FROM table WHERE ids IN ($ids)";
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How to convert an IPv4 address into a integer in C#?
...BitConverter.ToUInt32(IPAddress.Parse(value).GetAddressBytes().Reverse().ToArray() to fix IPAddress.Address is obsolete
– Mhmd
May 28 '16 at 11:50
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Is there a case insensitive jQuery :contains selector?
...icket/278
$.extend($.expr[':'], {
'containsi': function(elem, i, match, array)
{
return (elem.textContent || elem.innerText || '').toLowerCase()
.indexOf((match[3] || "").toLowerCase()) >= 0;
}
});
then use :containsi instead of :contains
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Java: convert List to a String
JavaScript has Array.join()
22 Answers
22
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Finding index of character in Swift String
...also applies to positions. The _position is probably an index into the raw array of bytes and they don't want to expose that. The String.Index is meant to protect us from accessing bytes in the middle of characters.
That means that any index you get must be created from String.startIndex or String....
Assign pandas dataframe column dtypes
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Another way to set the column types is to first construct a numpy record array with your desired types, fill it out and then pass it to a DataFrame constructor.
import pandas as pd
import numpy as np
x = np.empty((10,), dtype=[('x', np.uint8), ('y', np.float64)])
df = pd.DataFrame(x)
df.dty...
How to map and remove nil values in Ruby
...pact
=> [1, 3]
I'd like to remind people that if you're getting an array containing nils as the output of a map block, and that block tries to conditionally return values, then you've got code smell and need to rethink your logic.
For instance, if you're doing something that does this:
[1...