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Dynamic constant assignment
...ent each time the method is called. For example:
def foo
p "bar".object_id
end
foo #=> 15779172
foo #=> 15779112
Perhaps if you explained your use case—why you want to change the value of a constant in a method—we could help you with a better implementation.
Perhaps you'd rather hav...
Does the ternary operator exist in R?
...gt; x
[1] 1 2 1
> x <- ifelse(a==2, 1, 2)
> x
[1] 2 1 2
Just kidding, you can define c-style ?::
`?` <- function(x, y)
eval(
sapply(
strsplit(
deparse(substitute(y)),
":"
),
function(e) parse(text = e)
...
What is the difference between Nexus and Maven?
...often work together but they do very different parts of the job. Nexus provides a repository while Maven uses a repository to build software.
Here's a quote from "What is Nexus?":
Nexus manages software "artifacts" required for development. If you develop software, your builds can download depe...
Check a collection size with JSTL
... var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled...
git replace local version with remote version
... var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled...
How do I install package.json dependencies in the current directory using npm
...
Running:
npm install
from inside your app directory (i.e. where package.json is located) will install the dependencies for your app, rather than install it as a module, as described here. These will be placed in ./node_modules relative to your package.js...
Reset keys of array elements in php?
...
Didn't reset the keys of my array for some reason, had to use just the array_values function.
– SSH This
Mar 1 '13 at 20:30
...
Using sed and grep/egrep to search and replace
... as record separator. This is important to match the -Z of egrep and to avoid being fooled by spaces and newlines in input filenames.
-l: use one line per command as parameter
sed: the stream editor
-i: replace the input file with the output without making a backup
-e: use the following argument ...
How to get a substring of text?
...t is not okay to use a comma for negative positions: a[-4,-2]. The only valid notation is the two dots: a[-4..-2]. Learnt it the hard way.
– cavpollo
Jul 1 '15 at 6:59
...
What does Maven Update Project do in Eclipse?
...
To add on to what @Gimby said - Update Project also provides more options such as Force Update of Snapshots / Releases which is extremely helpful when you have dependencies that are looking for the latest. (e.g.: [1.0) will find 1.0.* - whatever's the...