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optional local variables in rails partial templates: how do I get out of the (defined? foo) mess?
...ould also use fetch with the optional default_value.
local_assigns.fetch :foo, default_value
This will return default_value if foo wasn't set.
WARNING:
Be careful with local_assigns.fetch :foo, default_value when default_value is a method, as it will be called anyway in order to pass its result...
git mv and only change case of directory
...git stash pop after. Continuing: To get around this, do the following:
mv foo foo2
git add -A
git commit -m "renaming"
mv foo2 FOO
git add -A
git commit --amend -m "renamed foo to FOO"
That's the drawn out way of changing the working directory, committing and then collapsing the 2 commits. You ca...
Best way to clear a PHP array's values
...id in the comments below you are able to simply re-instantiate it using
$foo = array(); // $foo is still here
If you want something more powerful use unset since it also will clear $foo from the symbol table, if you need the array later on just instantiate it again.
unset($foo); // $foo is gone...
How to write a CSS hack for IE 11? [duplicate]
...;
<style>
@media all and (-ms-high-contrast:none)
{
.foo { color: green } /* IE10 */
*::-ms-backdrop, .foo { color: red } /* IE11 */
}
</style>
</head>
<body>
<div class="foo">Hi There!!!</div>
</body>
</html>
Filters...
How to move/rename a file using an Ansible task on a remote system
...e the command module to just invoke the appropriate command:
- name: Move foo to bar
command: mv /path/to/foo /path/to/bar
If you want to get fancy then you could first use the stat module to check that foo actually exists:
- name: stat foo
stat: path=/path/to/foo
register: foo_stat
- nam...
“new” keyword in Scala
...he new keyword when you want to refer to a class's own constructor:
class Foo { }
val f = new Foo
Omit new if you are referring to the companion object's apply method:
class Foo { }
object Foo {
def apply() = new Foo
}
// Both of these are legal
val f = Foo()
val f2 = new Foo
If you've m...
What is the difference between a function expression vs declaration in JavaScript? [duplicate]
...d until all declarations are loaded.
Example: Function Expression
alert(foo()); // ERROR! foo wasn't loaded yet
var foo = function() { return 5; }
Example: Function Declaration
alert(foo()); // Alerts 5. Declarations are loaded before any code can run.
function foo() { return 5; }
As for ...
How do I mock an autowired @Value field in Spring with Mockito?
...ls;
ReflectionTestUtils.setField(instanceUnderTest, "defaultUrl", "http://foo");
// Note: Don't use MyClassUnderTest.class, use the instance you are testing itself
// Note: Don't use the referenced string "#{myProps[‘some.default.url']}",
// but simply the FIELDs name ("defaultUrl")
...
What are metaclasses in Python?
...ample of the bits and pieces:
def make_hook(f):
"""Decorator to turn 'foo' method into '__foo__'"""
f.is_hook = 1
return f
class MyType(type):
def __new__(mcls, name, bases, attrs):
if name.startswith('None'):
return None
# Go over attributes and see i...
Usage of __slots__?
...one time in an inheritance tree. For example:
class Base:
__slots__ = 'foo', 'bar'
class Right(Base):
__slots__ = 'baz',
class Wrong(Base):
__slots__ = 'foo', 'bar', 'baz' # redundant foo and bar
Python doesn't object when you get this wrong (it probably should), problems migh...