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Why use sprintf function in PHP?
I am trying to learn more about the PHP function sprintf() but php.net did not help me much as I am still confused, why would you want to use it?
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Count the items from a IEnumerable without iterating?
...enumerator.MoveNext())
result++;
}
return result;
So it tries to cast to ICollection<T>, which has a Count property, and uses that if possible. Otherwise it iterates.
So your best bet is to use the Count() extension method on your IEnumerable<T> object, as you will get the bes...
How to call base.base.method()?
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Nevermind, figured it out. Cast to Func<stuff> instead of Action
– Perkins
Sep 1 '18 at 4:14
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Resumable downloads when using PHP to send the file?
We are using a PHP scripting for tunnelling file downloads, since we don't want to expose the absolute path of downloadable file:
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isset() and empty() - what to use
... $var; (a variable declared, but without a value in a class)
From http://php.net/manual/en/function.empty.php
As mentioned in the comments the lack of warning is also important with empty()
PHP Manual says
empty() is the opposite of (boolean) var, except that no warning is
generated when...
Why is (object)0 == (object)0 different from ((object)0).Equals((object)0)?
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When you cast the int value 0 (or any other value type) to object, the value is boxed. Each cast to object produces a different box (i.e. a different object instance). The == operator for the object type performs a reference compariso...
best practice to generate random token for forgot password
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In PHP, use random_bytes(). Reason: your are seeking the way to get a password reminder token, and, if it is a one-time login credentials, then you actually have a data to protect (which is - whole user account)
So, the code wi...
Check whether a value is a number in JavaScript or jQuery [duplicate]
...this is probably what you need.
isFinite(val)
Returns true if val, when cast to a String, is a number and it is not equal to +/- Infinity
/^\d+$/.test(val)
Returns true if val, when cast to a String, has only digits (probably not what you need).
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How to alter a column's data type in a PostgreSQL table?
... For some other cases, you might need to specify the way to cast like ALTER TABLE tbl_name ALTER COLUMN col_name TYPE integer USING col_name::integer;
– Nobu
May 1 '14 at 17:45
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Double negation (!!) in javascript - what is the purpose? [duplicate]
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It casts to boolean. The first ! negates it once, converting values like so:
undefined to true
null to true
+0 to true
-0 to true
'' to true
NaN to true
false to true
All other expressions to false
Then the other ! negates i...