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How do I see what character set a MySQL database / table / column is?
What is the (default) charset for:
14 Answers
14
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Hash String via SHA-256 in Java
...
To hash a string, use the built-in MessageDigest class:
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.nio.charset.StandardCharsets;
import java.math.BigInteger;
public class CryptoHash {
public static ...
How can I specify a local gem in my Gemfile?
... gem... because you'll need to commit every change & bundle uninstall <gem> && bundle install , for every change you want reflected on your app
– Ramses
Nov 3 '17 at 18:17
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Is it safe to use -1 to set all bits to true?
...ts one (it has, of course).
But what we are talking about is what the result of the initialized flags variable is. And for it, only -1 will work with every type and machine.
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LINQ to SQL: Multiple joins ON multiple Columns. Is this possible?
...
Joining on multiple columns in Linq to SQL is a little different.
var query =
from t1 in myTABLE1List // List<TABLE_1>
join t2 in myTABLE1List
on new { t1.ColumnA, t1.ColumnB } equals new { t2.ColumnA, t2.ColumnB }
...
How to access the correct `this` inside a callback?
...data); // but might improve readability
}).bind(this); // <- here we are calling `.bind()`
transport.on('data', boundFunction);
}
In this case, we are binding the callback's this to the value of MyConstructor's this.
Note: When a binding context for jQuery, use jQuery.proxy ...
When monkey patching an instance method, can you call the overridden method from the new implementat
...like this:
class Foo
def bar
'Hello'
end
end
class ExtendedFoo < Foo
def bar
super + ' World'
end
end
ExtendedFoo.new.bar # => 'Hello World'
This works, if you control creation of the Foo objects. Just change every place which creates a Foo to instead create an ExtendedFo...
how to use sed, awk, or gawk to print only what is matched?
...o do this
sed -rn 's/.*abc([0-9]+)xyz.*/\1/gp'
-n don't print the resulting line
-r this makes it so you don't have the escape the capture group parens().
\1 the capture group match
/g global match
/p print the result
I wrote a tool for myself that makes this easier
rip 'abc(\d+)xyz' '$1'
...
Update ViewPager dynamically?
...hether they need to be moved to a different position or removed.
By default, getItemPosition() returns POSITION_UNCHANGED, which means, "This object is fine where it is, don't destroy or remove it." Returning POSITION_NONE fixes the problem by instead saying, "This object is no longer an item I'm ...
Detect if Android device has Internet connection
...internet is actually available
Make sure you have these two permission
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
if http does not work its because of the new android security they donot all...