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What is a higher kinded type in Scala?
...
Let me make up for starting some of this confusion by pitching in with some disambiguation. I like to use the analogy to the value level to explain this, as people tend to be more familiar with it.
A type constructor is a type that you ca...
How to send an email from JavaScript
... recomended
Send an email using only JavaScript
in short:
1. register for Mandrill to get an API key
2. load jQuery
3. use $.ajax to send an email
Like this -
function sendMail() {
$.ajax({
type: 'POST',
url: 'https://mandrillapp.com/api/1.0/messages/send.json',
data: ...
How can I add a key/value pair to a JavaScript object?
...e3";
Using square bracket notation:
obj["key3"] = "value3";
The first form is used when you know the name of the property. The second form is used when the name of the property is dynamically determined. Like in this example:
var getProperty = function (propertyName) {
return obj[propertyN...
Compile time string hashing
...In fact, what you're trying to achieve is exactly why I use this technique for!
– Clement JACOB
Aug 23 '13 at 7:07
2
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Getting the first character of a string with $str[0]
...string : Note: Strings may also be accessed using braces, as in $str{42}, for the same purpose. However, this syntax is deprecated as of PHP 5.3.0. Use square brackets instead, such as $str[42].
– VolkerK
Dec 29 '09 at 0:24
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Include all existing fields and add new fields to document
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I have been searching for a way to do this in C# driver, and so far it looks like the way to do it would be using something like IAggregateFluent<TResult>.AppendStage(new JsonPipelineStageDefinition<TInput, TOutput>("{ $addFields : { m...
Can I install Python windows packages into virtualenvs?
...ller_built_with_distutils.exe
Surprised? It looks like binary installers for Windows made with distutils combine .exe with .zip into one .exe file. Change extension to .zip to see it's a valid zip file. I discovered this after reading answers to my question Where can I download binary eggs with ps...
How do you build a Singleton in Dart?
...ew keyword suggests that the class is instantiated, which it isn't. I'd go for a static method get() or getInstance() like I do in Java.
– Steven Roose
Jan 24 '14 at 16:26
12
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Why does Javascript's regex.exec() not always return the same value? [duplicate]
...ge of the fact that exec returns null when there are no more matches by performing the assignment as the loop condition.
var re = /foo_(\d+)/g,
str = "text foo_123 more text foo_456 foo_789 end text",
match,
results = [];
while (match = re.exec(str))
results.push(+match[1]);
DEMO...
Mapping over values in a python dictionary
...t way to do this is to use a dict comprehension:
my_dictionary = {k: f(v) for k, v in my_dictionary.items()}
In python 2.7, use the .iteritems() method instead of .items() to save memory. The dict comprehension syntax wasn't introduced until python 2.7.
Note that there is no such method on lists...