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What is a None value?
...n if it is only that one None object.
You can test for it explicitly:
if foo is None:
# foo is set to None
if bar is not None:
# bar is set to something *other* than None
Another use is to give optional parameters to functions an 'empty' default:
def spam(foo=None):
if foo is not N...
How do I declare a namespace in JavaScript?
...
I like this:
var yourNamespace = {
foo: function() {
},
bar: function() {
}
};
...
yourNamespace.foo();
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How can jQuery deferred be used?
...apped Promise
return $.when(
cache[ val ] ||
$.ajax('/foo/', {
data: { value: val },
dataType: 'json',
success: function( resp ){
cache[ val ] = resp;
}
})
);
}
getData('foo').then(function(resp){
/...
JavaScript equivalent to printf/String.Format
...
That slightly and subtly changes the outcome. Imagine 'foo {0}'.format(fnWithNoReturnValue()). It would currently return foo {0}. With your changes, it would return foo undefined.
– fearphage
Feb 16 '13 at 14:51
...
Read text file into string array (and write)
...)
}
return w.Flush()
}
func main() {
lines, err := readLines("foo.in.txt")
if err != nil {
log.Fatalf("readLines: %s", err)
}
for i, line := range lines {
fmt.Println(i, line)
}
if err := writeLines(lines, "foo.out.txt"); err != nil {
log.Fat...
How Do I Document Packages in Java?
...java file and provide a standard javadoc style comment for a package:
com/foo/package-info.java:
/**
* com.foo is a group of bar utils for operating on foo things.
*/
package com.foo;
//rest of the file is empty
Language specification for packages
...
Why are C++ inline functions in the header?
...ultiple variations of. In order for the compiler to be able to e.g. make a Foo<int>::bar() function when you use the Foo template to create a Foo class, the actual definition of Foo<T>::bar() must be visible.
sha...
How does password salt help against a rainbow table attack?
...random, this is very unlikely. I'll probably have things like "hello" and "foobar" and "qwerty" in my list of commonly-used, pre-hashed passwords (the rainbow table), but I'm not going to have things like "jX95psDZhello" or "LPgB0sdgxfoobar" or "dZVUABJtqwerty" pre-computed. That would make the rain...
How to use underscore.js as a template engine?
...ut it.
Simple example:
var tpl = _.template("<h1>Some text: <%= foo %></h1>");
then tpl({foo: "blahblah"}) would be rendered to the string <h1>Some text: blahblah</h1>
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Loop through all nested dictionary values?
...e.
Similarly, you get an infinite loop with this implementation from Fred Foo:
def myprint(d):
stack = list(d.items())
while stack:
k, v = stack.pop()
if isinstance(v, dict):
stack.extend(v.items())
else:
print...