Build a Basic Python Iterator

Build a Basic Python Iterator

How would one create an iterative function (or iterator object) in python? 1:Iterator objects in python conform to the iterator protocol, which basically means they provide two methods: __iter__() and next(). The __iter__ returns the

JavaScript OR (||) variable assignment explanation

JavaScript OR (||) variable assignment explanation

Given this snippet of JavaScript...var a;var b = null;var c = undefined;var d = 4;var e = 'five';var f = a || b || c || d || e;alert(f); // 4Can someone please explain to me what this technique is called (my best guess is in the title of th

Why does division result in zero instead of a decimal?

Why does division result in zero instead of a decimal?

Teaching myself C and finding that when I do an equation for a temp conversion it won't work unless I change the fraction to a decimal. ie,tempC=(.555*(tempF-32)) will work but tempC=((5/9)*(tempF-32)) won't work. Why?According to C Prime

How to request a random row in SQL?

How to request a random row in SQL?

How can I request a random row (or as close to truly random as is possible) in pure SQL? 1:See this post: SQL to Select a random row from a database table. It goes through methods for doing this in MySQL, PostgreSQL, Microsoft SQL Server

How to use a variable for a key in a JavaScript object literal?

How to use a variable for a key in a JavaScript object literal?

Why does the following work?.stop().animate( { 'top' : 10 }, 10);Whereas this doesn't work:var thetop = 'top';.stop().animate( { thetop : 10 }, 10);To make it even clearer: At the moment I'm not able to pass a CS

How do I add months to a CURRENT_TIMESTAMP in SQL?

How do I add months to a CURRENT_TIMESTAMP in SQL?

How can I add months to the CURRENT_TIMESTAMP in SQL Server?The solution probably lies in DATEADD() but this works with a date only, not a datetime.Thanks. 1:This works perfectly fineSELECT DATEADD(month,1,CURRENT_TIMESTAMP)From DATEADD

Match line break with regular expression

Match line break with regular expression

Animal and Plant Health Inspection Service Permits Provides information on the various permits that the Animal and Plant Health Inspection Service issues as well as online access for acquiring those permits.I want to use a regular expres

What is the optional argument in C# interpolated string for?

What is the optional argument in C# interpolated string for?

Interpolated strings is one of the new features of C# 6.0. According to MSDN, the syntax of the embedded C# expressions can contain an optional, comma-separated value, deemed as in the documentation.Unfortunately I didn't find what this fi

Multiple conditions in a C 'for' loop

Multiple conditions in a C 'for' loop

I came across this piece of code. I generally use '&&' or '||' to separate multiple conditions in a for loop, but this code uses commas to do that.Surprisingly, if I change the order of the conditions the output varies.#includeint main() {

Check for inf - objective c

Check for inf - objective c

Would anyone know the method for testing whether a double (or integer) is infinity, for example when 1/0 operation is performed?isfinite(n) does not seem to work. 1:You may check if(d == INFINITY) {}or if(d > DBL_MAX) {}INFINITY is a con

How to replace all spaces in a string

How to replace all spaces in a string

i have two html text input, out of that what ever user type in first text box that need to reflect on second text box while reflecting it should replace all spaces to semicolon. I did to some extant and it replacing for first space not for

AnyObject to Array?

AnyObject to Array?

I'm using NSJSONSerialization as so:let twData: AnyObject? = NSJSONSerialization.JSONObjectWithData(responseData, options: NSJSONReadingOptions.MutableLeaves, error: &dataError)This gives me an AnyObject?.From here, I want to convert it to

Angular JS $watch vs $on

Angular JS $watch vs $on

I want to execute a function inside a directive, whenever there is a state change in the parent scope.The obvious way to achieve this is to use event broadcasts ($broadcast) and listeners ($on).I am curious if using a $watch is an alternati

FirstName, LastName in SQL, too complex?

FirstName, LastName in SQL, too complex?

This SQL seems complex, is there an easier way to get FirstName, LastName when one or both of the fields can be NULL?SELECT COALESCE(LastName,'')+ CASE WHEN LastName+FirstName IS NOT NULL THEN ', ' END+ COALESCE(FirstName,'') AS

String replace in Java

String replace in Java

I currently have a string which contains the characters A, B and C for example the string looks like "A some other random stuff B C"the other random stuff doesn't contain A, B or C I want to replace the A, B & C with 'A', 'B' and 'C' respec

Showing custom tooltip?/Popup when hovering over an object in Silverlight

Showing custom tooltip?/Popup when hovering over an object in Silverlight

How can I go about getting similar popup/hover/tooltip (see image below) when I hover or click on an object in my Silverlight app?Update: (added bounty)I am looking for a control which can drop a shadow and show the arrow. I want like 3-4 l

Pulling Apart Expression

Pulling Apart Expression

I am busy creating wrapper extension methods on top of Dapper and DapperExtensions. At the moment I am trying to add filtering to the GetList extension method, similar to LINQ's Where extension method. I have seen this question but it seems

The provided regular expression is using multiline anchors (^ or $)

The provided regular expression is using multiline anchors (^ or $)

I trying to write a Image validation format that makes sure url ends with either .png, .jpg or .gif .class Product true, :uniqueness => true validates :image_url, :presence => true, :format => {

How to read multiple gzipped files from S3 into a single RDD?

How to read multiple gzipped files from S3 into a single RDD?

I have many gzipped files stored on S3 which are organized by project and hour per day, the pattern of the paths of the files is as:s3:///project1/20141201/logtype1/logtype1.0000.gzs3:///project1/20141201/logtype1/logtype1.0100.gz....s3:///

How to set correct attribute names to a json aggregated result with GROUP BY clause?

How to set correct attribute names to a json aggregated result with GROUP BY clause?

I have a table temp defined like this:id | name | body | group_id-------------------------------1 | test_1 | body_1 | 12 | test_2 | body_2 | 13 | test_3 | body_3 | 24 | test_4 | body_4 | 2I would like to produce a result grouped by

What does the '+new' mean in JavaScript?

What does the '+new' mean in JavaScript?

Looking through the jQuery source in the function now() I see the following:function now(){ return +new Date;}I've never seen the plus operator prepended to the new operator like this. What does it do? 1:Nicolás and Brian are right,

How to get multiline TODO's in Resharper 8

How to get multiline TODO's in Resharper 8

I have be trying to figure out how to change the regular expression in the Options -> To-Do's in resharper to color code and allow for multiple lines in a todo.Any Ideas? 1:I figured out the answer, easier than I thoughtOrignal regex for

Javascript strange loading sequence

Javascript strange loading sequence

In the code below I expected to see the following sequence 1, 2, loaded but I get 1, loaded, 2Why? 1:You forgot ; after window onload function expression. So it becomes:window.onload = function () { console.log('loaded');}(function()

Excluding files/folders from VSTS publish

Excluding files/folders from VSTS publish

We are using the new VSO/VSTS style build within TFS on premise, 2015 Update 1 as of yesterday.During the publish build artifacts stage we want to copy all the files/folders from a root bar 2 sub folders.ie:$\somefilestopublish1\...$\somefi

Vim highlight a list of words

Vim highlight a list of words

I need to highlight a list of words in vim, preferably the words should be defined in a file. A bit like spell checking. I have been looking at http://vim.wikia.com/wiki/Highlight_multiple_words but it requires that I define each word as a