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How do I know if a generator is empty from the start?
Is there a simple way of testing if the generator has no items, like peek , hasNext , isEmpty , something along those lines?
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How to get the difference between two arrays in JavaScript?
...c"));
A better solution, if you don't care about backward compatibility, is using filter. But still, this solution works.
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Exposing a port on a live Docker container
...ruction inside a Dockerfile to expose a port, and I can use the -p flag with docker run to assign ports, but once a container is actually running, is there a command to open/map additional ports live?
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Windows batch files: .bat vs .cmd?
As I understand it, .bat is the old 16-bit naming convention, and .cmd is for 32-bit Windows, i.e., starting with NT. But I continue to see .bat files everywhere, and they seem to work exactly the same using either suffix. Assuming that my code will never need to run on anything older than NT, d...
JavaScript null check
...iable:
var a;
alert(b); // ReferenceError: b is not defined
A variable with the value undefined:
var a;
alert(a); // Alerts “undefined”
When a function takes an argument, that argument is always declared even if its value is undefined, and so there won’t be any error. You are right about...
Twitter bootstrap modal-backdrop doesn't disappear
I am using the Twitter bootstrap Modal dialog. When I click on the submit button of the bootstrap modal dialog, it sends an AJAX request. My problem is that the modal-backdrop doesn't disappear. The Modal dialog does disappear correctly, but instead "modal-backdrop in" that creates the opacity on th...
Is there an alternative to bastard injection? (AKA poor man's injection via default constructor)
... understand, this question relates to how to expose a loosely coupled API with some appropriate defaults. In this case, you may have a good Local Default, in which case the dependency can be regarded as optional. One way to deal with optional dependencies is to use Property Injection instead of Cons...
Undefined symbols for architecture i386: _OBJC_CLASS_$_SKPSMTPMessage", referenced from: error
...hases" tab of your target. Normally Xcode does this for you, but sometimes it loses the plot and you need to add the .m file manually.
To do this:
TargetSettings -> Build Phases -> Compile Sources -> add your .m class ->Build and Run
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Wait for page load in Selenium
How do you make Selenium 2.0 wait for the page to load?
47 Answers
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Recompile Heroku slug without push or config change
I'm wondering if there is a way to force Heroku to recompile the slug without pushing new commits and/or updating the config variables.
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