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Error: could not find function … in R
...ntains the function? install.packages("thePackage") (this only needs to be done once)
Did you attach that package to the workspace ?
require(thePackage) or library(thePackage) (this should be done every time you start a new R session)
Are you using an older R version where this function didn't exis...
Securely storing environment variables in GAE with app.yaml
...I push app.yaml to GitHub, this information becomes public (not good). I don't want to store the info in a datastore as it does not suit the project. Rather, I'd like to swap out the values from a file that is listed in .gitignore on each deployment of the app.
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Java Reflection: How to get the name of a variable?
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Then how do you explain this: java.sun.com/javase/6/docs/api/java/lang/reflect/Field.html ?
– Outlaw Programmer
Apr 13 '09 at 15:22
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How to check if an appSettings key exists?
How do I check to see if an Application Setting is available?
9 Answers
9
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String comparison in bash. [[: not found
... am trying to compare strings in bash. I already found an answer on how to do it on stackoverflow . In script I am trying, I am using the code submitted by Adam in the mentioned question:
...
Why JavaScript rather than a standard browser virtual machine?
...nguage" for the web, with other better designed languages and APIs compile down to it (and cater for different runtime engine foibles).
I don't think, however, any of these "better designed languages" will be Java, Python or Ruby. Javascript is, despite the ability to be used elsewhere, a Web appli...
Cryptic “Script Error.” reported in Javascript in Chrome and Firefox
...-origin policy - i.e. when the error occurs in a script that's hosted on a domain other than the domain of the current page.
This behavior is intentional, to prevent scripts from leaking information to external domains. For an example of why this is necessary, imagine accidentally visiting evilsit...
Initialize class fields in constructor or at declaration?
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My rules:
Don't initialize with the default values in declaration (null, false, 0, 0.0…).
Prefer initialization in declaration if you don't have a constructor parameter that changes the value of the field.
If the value of the field c...
What do parentheses surrounding an object/function/class declaration mean? [duplicate]
...iases to the objects in the YUI library, but it has more powerful uses.
I don't want to leave you without a code example, so I'll put here a simple example to illustrate a closure:
var add_gen = function(n) {
return function(x) {
return n + x;
};
};
var add2 = add_gen(2);
add2(3); // resul...
How to check if a char is equal to an empty space?
...r is a primitive data type, so it can be compared with ==.
Also, by using double quotes you create String constant (" "), while with single quotes it's a char constant (' ').
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