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JavaScript, elegant way to check nested object properties for null/undefined [duplicate]
...that i have an object e.g. user = {} and through the course of using the app this gets populated. Let's say somwhere, after an AJAX call or something i do this:
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Value cannot be null. Parameter name: source
...;
</defaultConnectionFactory>
</entityFramework>
What's happening is that it's looking for a data source in the wrong place; Entity Framework specifies it slightly differently. If you post your connection string and EF config then we can check.
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Convert XML to JSON (and back) using Javascript
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This is only in the browser. Doesn't apply for node.js or non-browser environments. Any other ideas?
– Homer6
May 2 '13 at 17:47
1
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What is the best way to check for Internet connectivity using .NET?
...s and offices block the ping protocol. If you are using this method for an application that will be used by clients I would advise against this method of checking internet
– user1
Apr 29 '15 at 11:26
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How to make an Android device vibrate?
I wrote an Android application. Now, I want to make the device vibrate when a certain action occurs. How can I do this?
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How can I include a YAML file inside another?
...ly easy to do.
I have used YAML as a configuration language in my python apps, and in this case often define a convention like this:
>>> main.yml <<<
includes: [ wibble.yml, wobble.yml]
Then in my (python) code I do:
import yaml
cfg = yaml.load(open("main.yml"))
for inc in cf...
Where is PHP.ini in Mac OS X Lion? Thought it was in /usr/local/php5/lib
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To locate the ini file on your machine, open Terminal.app and run the following command:
php --ini
If you need a template for Lion, try this.
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Smart way to truncate long strings
...n that ("Don't modify objects you don't own". I wouldn't mind though).
An approach without extending the String prototype is to create
your own helper object, containing the (long) string you provide
and the beforementioned method to truncate it. That's what the snippet
below does.
const Lon...
RSpec controller testing - blank response.body
...However, if you wish to make your controller specs render templates as the app normally would, use the render_views directive:
describe YourController do
render_views
...
end
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How to serialize Joda DateTime with Jackson JSON processor?
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This has become very easy with Jackson 2.0 and the Joda module.
ObjectMapper mapper = new ObjectMapper();
mapper.registerModule(new JodaModule());
Maven dependency:
<dependency>
<groupId>com.fasterxml.jackson.datatype</groupId>
<artifactId>jackson-datatype-joda<...