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Is there a “null coalescing” operator in JavaScript?
...Boolean(null)); // false
alert(Boolean(undefined)); // false
alert(Boolean(0)); // false
alert(Boolean("")); // false
alert(Boolean("false")); // true -- gotcha! :)
This means:
var whatIWant = null || new ShinyObject(); // is a new shiny object
var whatIWant = undefined || "well defined"; // is "...
how to specify local modules as npm package dependencies
...odule with its own package.json. See Creating NodeJS modules.
As of npm 2.0, local dependencies are supported natively. See danilopopeye's answer to a similar question. I've copied his response here as this question ranks very high in web search results.
This feature was implemented in the vers...
Suppress properties with null value on ASP.NET Web API
...ueHandling = NullValueHandling.Ignore
}
};
config.Formatters.RemoveAt(0);
config.Formatters.Insert(0, jsonformatter);
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Determine function name from within that function (without using traceback)
...
208
Python doesn't have a feature to access the function or its name within the function itself. It...
How do I get the name of captured groups in a C# Regex?
...oupName in regex.GetGroupNames())
{
Console.WriteLine(
"Group: {0}, Value: {1}",
groupName,
groups[groupName].Value);
}
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How to get the name of the calling method?
...
puts caller[0]
or perhaps...
puts caller[0][/`.*'/][1..-2]
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Can the jQuery UI Datepicker be made to disable Saturdays and Sundays (and holidays)?
...
The function takes a date as a parameter and must return an array with [0] equal to true/false indicating whether or not this date is selectable and 1 equal to a CSS class name(s) or '' for the default presentation. It is called for each day in the datepicker before is it displayed.
Display some...
Explain the use of a bit vector for determining if all characters are unique
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103
int checker is used here as a storage for bits. Every bit in integer value can be treated as a ...
How do I convert a string to a double in Python?
...
>>> x = "2342.34"
>>> float(x)
2342.3400000000001
There you go. Use float (which behaves like and has the same precision as a C,C++, or Java double).
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How to tell if JRE or JDK is installed
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160
You can open up terminal and simply type
java -version // this will check your jre version
jav...