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How can you find and replace text in a file using the Windows command-line environment?
...nvironment and want to change each occurrence of some text in a file (ex. "FOO") with another (ex. "BAR"). What is the simplest way to do that? Any built in functions?
...
difference between use and require
...
If I require lib foo, then to use bar in foo, I'd have to write foo/bar every time, right? Why would you want to load a lib in ns but then not refer it into the ns? I guess you might be worried about collisions, and you don't want to bother h...
Difference between a Structure and a Union
... enum indicating the type of value and a union to store that value.
union foo {
int a; // can't use both a and b at once
char b;
} foo;
struct bar {
int a; // can use both a and b simultaneously
char b;
} bar;
union foo x;
x.a = 3; // OK
x.b = 'c'; // NO! this affects the value of x.a...
Can an AngularJS controller inherit from another controller in the same module?
...oller():
app.controller('ParentCtrl', function(etc...) {
this.foo = 'bar';
});
app.controller('ChildCtrl', function($scope, $controller, etc...) {
var ctrl = $controller('ParentCtrl as parent', {etc: etc, ...});
angular.extend(this, ctrl);
});
Then, in HTM...
How is null + true a string?
...er user-defined operators available on unmentioned types. For example:
// Foo defined Foo operator+(Foo foo, bool b)
Foo f = null;
Foo g = f + true;
That's fine, but it's not used for a null literal, because the compiler doesn't know to look in Foo. It only knows to consider string because it's a...
What is the difference between Class.getResource() and ClassLoader.getResource()?
...always deemed to be absolute.
So the following are basically equivalent:
foo.bar.Baz.class.getResource("xyz.txt");
foo.bar.Baz.class.getClassLoader().getResource("foo/bar/xyz.txt");
And so are these (but they're different from the above):
foo.bar.Baz.class.getResource("/data/xyz.txt");
foo.bar....
How to add elements of a Java8 stream into an existing List
...ample:
List<String> destList = new ArrayList<>(Arrays.asList("foo"));
List<String> newList = Arrays.asList("0", "1", "2", "3", "4", "5");
newList.parallelStream()
.collect(Collectors.toCollection(() -> destList));
System.out.println(destList);
When I run this program, ...
Preloading images with jQuery
... } (new Image(), pictureUrls[i]));
}
};
preloadPictures(['http://foo/picture.bar', 'http://foo/picture.bar', 'http://foo/picture.bar', 'http://foo/picture.bar'], function(){
console.log('a');
});
preloadPictures(['http://foo/picture.bar', 'http://foo/picture.bar', 'http://foo/picture....
How do I create a variable number of variables?
...
'eggs'
For cases where you're thinking of doing something like
var1 = 'foo'
var2 = 'bar'
var3 = 'baz'
...
a list may be more appropriate than a dict. A list represents an ordered sequence of objects, with integer indices:
lst = ['foo', 'bar', 'baz']
print(lst[1]) # prints bar, becau...
Why exactly is eval evil?
... problems
To explain the last point with a simplified example:
(defmacro foo (a b)
(list (if (eql a 3) 'sin 'cos) b))
So, I may want to write a macro that based on the first parameter uses either SIN or COS.
(foo 3 4) does (sin 4) and (foo 1 4) does (cos 4).
Now we may have:
(foo (+ 2 1) 4)
Th...