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Couldn't connect to server 127.0.0.1:27017
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Eclipse - no Java (JRE) / (JDK) … no virtual machine
...ault "java.exe" (the first one referenced by your PATH)
Three things to remember:
"Installing" a JRE or a JDK can be as simple as unzipping or copying it from another computer: there is no special installation steps, and you can have as many different JVM versions (1.4, 5.0, 6.0...) as you want, ...
JRE 1.7 - java version - returns: java/lang/NoClassDefFoundError: java/lang/Object
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Windows
To unpack one .pack file (for example rt.pack), run:
"%JAVA_HOME%\bin\unpack200" -r -v rt.pack rt.jar
To recursively unpack all .pack files, from the JRE root run:
for /r %f in (*.pack) do "%JAVA_HOME%\bin\unpack200.exe" -r -q "%f" "%~pf%~nf.jar"
*nix
To unpack one .pack file (for...
Cluster analysis in R: determine the optimal number of clusters
...n R, I'm not very sure how to choose the best number of clusters to do a k-means analysis. After plotting a subset of below data, how many clusters will be appropriate? How can I perform cluster dendro analysis?
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In Mongoose, how do I sort by date? (node.js)
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Sorting in Mongoose has evolved over the releases such that some of these answers are no longer valid. As of the 4.1.x release of Mongoose, a descending sort on the date field can be done in any of the following ways:
Room.find({}).sort('-date').exec(function(err, docs) { ... });
Room...
Check, using jQuery, if an element is 'display:none' or block on click
I want to check and sort elements that are hidden. Is it possible to find all elements with attribute display and value none ?
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Stop jQuery .load response from being cached
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thank you! Is this even located in the jQuery documentation? Ahh... found it. Kind of berried. This had been kicking by butt for most of the day... Thanks again!
– bytebender
Feb 19 '10 at 20:30
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PostgreSQL - Rename database
I need to rename the database but when I do in
PGAdmin : ALTER DATABASE "databaseName" RENAME TO "databaseNameOld" it told me that it cannot.
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How to use the TextWatcher class in Android?
Can anyone tell me how to mask the substring in EditText or how to change EditText substring input to password type or replace by another character like this 123xxxxxxxxx3455
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Can you organize imports for an entire project in eclipse with a keystroke?
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Select the project in the package explorer and press Ctrl + Shift + O (same keystroke as the single class version). Should work for packages, etc.
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