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Get string character by index - Java
... can use to give me the character at the nth position? So in the string "foo", if I asked for the character with index 0 it would return "f".
...
How do you 'redo' changes after 'undo' with Emacs?
... Suppose you do have an operation sequence that looks like this:
Insert "foo"
Insert "bar"
Insert "I love spam"
Now, you undo. It undoes the last action, resulting in the following list:
Insert "foo"
Insert "bar"
If you do something other than undo at this point - say, C-f, the operation st...
How to prettyprint a JSON file?
...ent by:
>>> import json
>>>
>>> your_json = '["foo", {"bar":["baz", null, 1.0, 2]}]'
>>> parsed = json.loads(your_json)
>>> print(json.dumps(parsed, indent=4, sort_keys=True))
[
"foo",
{
"bar": [
"baz",
null,
...
Moving from CVS to Git: $Id$ equivalent?
...sion like I expected. You have to re-co the file, for example,
git commit foo.sh
rm foo.sh
git co foo.sh
And then you will see the expansion, for example:
$ head foo.sh
#!/bin/sh
# $Id: e184834e6757aac77fd0f71344934b1cd774e6d4 $
Some good information is in How do I enable the ident string for...
Function overloading in Javascript - Best practices
...last argument to their methods. This object can hold anything.
function foo(a, b, opts) {
// ...
if (opts['test']) { } //if test param exists, do something..
}
foo(1, 2, {"method":"add"});
foo(3, 4, {"test":"equals", "bar":"tree"});
Then you can handle it anyway you want in your method. ...
How to specify test directory for mocha?
...ource that they test, but call the test files *.spec.js. For example: src/foo/foo.js is tested by src/foo/foo.spec.js.
To run all the tests named *.spec.js by convention:
"scripts": {
"test": "mocha **/*.spec.js"
},
Then to run all the tests call:
npm test
See the pattern here? Good...
Iterate through object properties
...fail if the object has an unrelated field with the same name:
var obj = { foo: 42, hasOwnProperty: 'lol' };
obj.hasOwnProperty('foo'); // TypeError: hasOwnProperty is not a function
That's why it's safer to call it through Object.prototype instead:
var obj = { foo: 42, hasOwnProperty: 'lol' };
...
Set type for function parameters?
... Eclipse JavaScript Editor - Outline View and Code Completion. whereas the foo( /*MyType*/ param ) way as described here also works: stackoverflow.com/a/31420719/1915920
– Andreas Dietrich
Feb 17 '16 at 8:37
...
What's the difference between belongs_to and has_one?
...
It's about where the foreign key sits.
class Foo < AR:Base
end
If foo belongs_to :bar, then the foos table has a bar_id column
If foo has_one :bar, then the bars table has a foo_id column
On the conceptual level, if your class A has a has_one relationship with c...
Dump a NumPy array into a csv file
...port numpy
a = numpy.asarray([ [1,2,3], [4,5,6], [7,8,9] ])
numpy.savetxt("foo.csv", a, delimiter=",")
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