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When NOT to use yield (return) [duplicate]
... use of yield will be limiting, unnecessary, get me into trouble, or otherwise should be avoided?
It's a good idea to think carefully about your use of "yield return" when dealing with recursively defined structures. For example, I often see this:
public static IEnumerable<T> PreorderTraver...
How to force Selenium WebDriver to click on element which is not currently visible?
...
Selenium determines an element is visible or not by the following criteria (use a DOM inspector to determine what css applies to your element, make sure you look at computed style):
visibility != hidden
display != none (is also checked against every pare...
What's the better (cleaner) way to ignore output in PowerShell? [closed]
...ions that I know about.
Measure-Command {$(1..1000) | Out-Null}
TotalMilliseconds : 76.211
Measure-Command {[Void]$(1..1000)}
TotalMilliseconds : 0.217
Measure-Command {$(1..1000) > $null}
TotalMilliseconds : 0.2478
Measure-Command {$null = $(1..1000)}
TotalMilliseconds : 0.2122
## Contr...
Cleaner way to do a null check in C#? [duplicate]
Suppose, I have this interface,
19 Answers
19
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Rails: How do I create a default value for attributes in Rails activerecord's model? [duplicate]
... attribute by defining it in ActiveRecord. By default everytime the record is created, I want to have a default value for attribute :status . I tried to do this:
...
Choosing a Java Web Framework now? [closed]
we are in the planning stage of migrating a large website which is built on a custom developed mvc framework to a java based web framework which provides built-in support for ajax, rich media content, mashup, templates based layout, validation, maximum html/java code separation. Grails looked like a...
How do you detect where two line segments intersect? [closed]
...
There’s a nice approach to this problem that uses vector cross products. Define the 2-dimensional vector cross product v × w to be vx wy − vy wx.
Suppose the two line segments run from p to p + r and from q to q + s. Then any point on the...
How to add a WiX custom action that happens only on uninstall (via MSI)?
...
EDIT: Perhaps look at the answer currently immediately below.
This topic has been a headache for long time. I finally figured it out.
There are some solutions online, but none of them really works. And of course there is no documentation.
So in the chart below there are several properties...
Why do Lua arrays(tables) start at 1 instead of 0?
I don't understand the rationale behind the decision of this part of Lua. Why does indexing start at 1? I have read (as many others did) this great paper . It seems to me a strange corner of a language that is very pleasant to learn and program. Don't get me wrong, Lua is just great but there has t...
What is Angular.noop used for?
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angular.noop is an empty function that can be used as a placeholder when you need to pass some function as a param.
function foo (callback) {
// Do a lot of complex things
callback();
}
// Those two have the same effect, but th...