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Java8: Why is it forbidden to define a default method for a method from java.lang.Object
...ltiple inheritance.
Further, imagine you are writing this class:
class Foo implements com.libraryA.Bar, com.libraryB.Moo {
// Implementation of Foo, that does NOT override equals
}
The Foo writer looks at the supertypes, sees no implementation of equals, and concludes that to get referenc...
PEP 8, why no spaces around '=' in keyword argument or a default parameter value?
...rgument. So consider this:
func(1, 2, axis='x', angle=90, size=450, name='foo bar')
over this:
func(1, 2, axis = 'x', angle = 90, size = 450, name = 'foo bar')
Also, it doesn't make much sense to use variables as default values. Perhaps some constant variables (which aren't really constants) a...
In laymans terms, what does 'static' mean in Java? [duplicate]
... don't need to create an instance of the class to access it.
public class Foo {
public static void doStuff(){
// does stuff
}
}
So, instead of creating an instance of Foo and then calling doStuff like this:
Foo f = new Foo();
f.doStuff();
You just call the method directly again...
php is null or empty?
...
As is shown in the following table, empty($foo) is equivalent to $foo==null and is_null($foo) has the same function of $foo===null. The table also shows some tricky values regarding the null comparison. (ϕ denotes an uninitialized variables. )
empty is_n...
Remove blank lines with grep
...
Try the following:
grep -v -e '^$' foo.txt
The -e option allows regex patterns for matching.
The single quotes around ^$ makes it work for Cshell. Other shells will be happy with either single or double quotes.
UPDATE: This works for me for a file with bl...
return statement vs exit() in main()
...o anything special about auto storage in main(). Please take care to read Footnote #11 below the paragraph you referenced in your comment.
– Greg A. Woods
Dec 9 '15 at 19:21
1
...
Django - How to rename a model field using South?
... # Rename 'name' field to 'full_name'
db.rename_column('app_foo', 'name', 'full_name')
def backwards(self, orm):
# Rename 'full_name' field to 'name'
db.rename_column('app_foo', 'full_name', 'name')
The first argument of db.rename_column is the table name, so...
How to make MySQL handle UTF-8 properly
...and the table.
You can have a look (MySQL commands):
show create database foo;
> CREATE DATABASE `foo`.`foo` /*!40100 DEFAULT CHARACTER SET latin1 */
show create table foo.bar;
> lots of stuff ending with
> ) ENGINE=InnoDB AUTO_INCREMENT=252 DEFAULT CHARSET=latin1
In other words; it's...
Environment variable substitution in sed
...tement more readable and less error prone).
So if you want to search for 'foo' and replace it with the content of $BAR, you can enclose the sed command in double-quotes.
sed 's/foo/$BAR/g'
sed "s/foo/$BAR/g"
In the first, $BAR will not expand correctly while in the second $BAR will expand correc...
How to escape @ characters in Subversion managed file names?
...afterwards be treated as a plain name. For example, if you want to rename @foo to @bar, svn rename @foo@ @bar will complain about @bar; but if you make it svn rename @foo@ @bar@, the new name will be literally @bar@. To avoid this, add ./ (or .\ on windows) to make it clear it's a local path: svn r...