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What data type to use for hashed password field and what length?
...ion is not strong enough for storing passwords. You should read the answer from Gilles on this thread for a more detailed explanation.
For passwords, use a key-strengthening hash algorithm like Bcrypt or Argon2i. For example, in PHP, use the password_hash() function, which uses Bcrypt by default.
...
Which encoding opens CSV files correctly with Excel on both Mac and Windows?
...252 for some reason. Be advised that ISO-8859-1 is missing some characters from WINDOWS-1252 as shown here:
| Char | ANSI | Unicode | ANSI Hex | Unicode Hex | HTML entity | Unicode Name | Unicode Range |
| € | 128 | 8364 | 0x80 | U+20AC | &...
What's the difference between and
...lt;?> means anythings. So It can accept of Type which are not inherited from Object class.
<? extends Object>
<? extends Object> means you can pass an Object or a sub-class that extends Object class.
ArrayList<? extends Number> numberList = new ArrayList<Number>(); //...
Passing enum or object through an intent (the best solution)
... intent.putExtra(name, ordinal());
}
public static AwesomeEnum detachFrom(Intent intent) {
if(!intent.hasExtra(name)) throw new IllegalStateException();
return values()[intent.getIntExtra(name, -1)];
}
}
Usage:
// Sender usage
AwesomeEnum.SOMETHING.attachTo(intent);
// Receiver us...
How to equalize the scales of x-axis and y-axis in Python matplotlib?
...
You need to dig a bit deeper into the api to do this:
from matplotlib import pyplot as plt
plt.plot(range(5))
plt.xlim(-3, 3)
plt.ylim(-3, 3)
plt.gca().set_aspect('equal', adjustable='box')
plt.draw()
doc for set_aspect
...
Unsigned keyword in C++
...
From the link above:
Several of these types can be modified using the keywords signed, unsigned, short, and long. When one of these type modifiers is used by itself, a data type of int is assumed
This means that you can...
Spark java.lang.OutOfMemoryError: Java heap space
...or your heap. IME reducing the mem frac often makes OOMs go away. UPDATE: From spark 1.6 apparently we will no longer need to play with these values, spark will determine them automatically.
Similar to above but shuffle memory fraction. If your job doesn't need much shuffle memory then set it to a...
Class with single method — best approach?
...andards, standards, standards!
Using instance methods does not inhibit you from also using static methods, and vice versa. As long as there's reasoning behind the differentiation and it's standardised. There's nothing worse than looking over a business layer sprawling with different implementation m...
Would it be beneficial to begin using instancetype instead of id?
...Data: there. Other examples exist, such as length, which returns a CGFloat from UILayoutSupport but a NSUInteger from NSString.)
Note: Since I wrote this, the macOS headers have been modified to return a NSFileHandle instead of an id.
For initializers, it's more complicated. When you type this:
-...
What is a practical use for a closure in JavaScript?
... has only a function, it could also have variables that are not accessible from the outside. Say: var obj = (function () { var value = 0; return { get: function () { return value; }, set: function (val) { value = val; } } })(); obj.set(20); obj.get(); => 20 etc.
...