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Simplest way to check if key exists in object using CoffeeScript
... to JavaScript's key in obj. (CoffeeScript uses of when referring to keys, and in when referring to array values: val in arr will test whether val is in arr.)
thejh's answer is correct if you want to ignore the object's prototype. Jimmy's answer is correct if you want to ignore keys with a null or ...
How to list all tags that contain a commit?
...earch the tree. Also, the repository I tried it on is so large git bailed and got SIGKILL'ed.
– atx
Oct 27 '11 at 23:00
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What is WCF RIA services?
...light) objects that take care of the communication with the server for you and provide client-side validation.
The main object inside a RIA service is a DomainService, usually a LinqToEntitiesDomainService that is connected to a LinqToEntities model.
The key thing to remember in RIA services is th...
“use database_name” command in PostgreSQL
...you must get a new connection.
Using \c in psql closes the old connection and acquires a new one, using the specified database and/or credentials. You get a whole new back-end process and everything.
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Why can't I push to this bare repository?
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I'm doing sudo apt-get upgrade git-core and sudo apt-get upgrade git and it think no update is necessary. git --version returns 1.7.3.1. Any idea what's missing? I admit currently apt-get update doesn't work for me, but it did not too long ago.
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How to “re-run with -deprecation for details” in sbt?
... in ThisBuild, set applies the settings to all sub-projects, as well.
Command Line
You could also run the above as a single command on command line.
sbt '; set scalacOptions in ThisBuild ++= Seq("-unchecked", "-deprecation") ; compile'
The trick is to use ; (semicolons) to separate commands an...
What's the difference between .so, .la and .a library files?
...re than one copy of it in memory). But what is the difference between .a and .la ? Are these all static libraries?
1 Ans...
What is resource-ref in web.xml used for?
...reason, you'll need to update all the references in all your applications, and then rebuild and redeploy them.
<resource-ref> introduces another layer of indirection: you specify the name you want to use in the web.xml, and, depending on the container, provide a binding in a container-specifi...
What is this: [Ljava.lang.Object;?
...f the class of which the object is an instance, the at-sign character `@', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of:
getClass().getName() + '@' + Integer.toHexString(hashCode())
Note: you can no...
How to abandon a hg merge?
...d of code formatter tool to do the entire operation, or at least some find and replace with regular expressions. Something as simple as replacing what matches ^____ (use 4 spaces instead of underscores) with __ (2 spaces), repeated a few times (unless you have insanely some nested code) should work....