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How to generate a random number between a and b in Ruby?
...ction-and-changes-5428.html
Converting to array may be too expensive, and it's unnecessary.
(a..b).to_a.sample
Or
[*a..b].sample
Array#sample
Standard in Ruby 1.8.7+.
Note: was named #choice in 1.8.7 and renamed in later versions.
But anyway, generating array need resources, and solutio...
How do I add comments to package.json for npm install?
... for comments ... If you want to use a multiple line comment, you can use either an array, or multiple "//" keys.
When using your usual tools (npm, yarn, etc) multiple "//" keys will be removed. This survives:
{ "//": [
"first line",
"second line" ] }
This will not survive:
{ "//": "thi...
Removing duplicate objects with Underscore for Javascript
...5},{a:2},{a:3},{a:4},{a:3},{a:2}];
var uniqueList = _.uniq(list, function(item, key, a) {
return item.a;
});
// uniqueList = [Object {a=1, b=5}, Object {a=2}, Object {a=3}, Object {a=4}]
Notes:
Callback return value used for comparison
First comparison object with unique return value used...
Code coverage for Jest
... directory I found an index.html file that could be loaded into a browser. It included the information printed at the command line, plus additional information and some graphical output.
share
|
imp...
JOIN queries vs multiple queries
...his is way too vague to give you an answer relevant to your specific case. It depends on a lot of things. Jeff Atwood (founder of this site) actually wrote about this. For the most part, though, if you have the right indexes and you properly do your JOINs it is usually going to be faster to do 1 tri...
Conditionally ignoring tests in JUnit 4
...
The JUnit way is to do this at run-time is org.junit.Assume.
@Before
public void beforeMethod() {
org.junit.Assume.assumeTrue(someCondition());
// rest of setup.
}
You can do it in a @Before method or in the test its...
How do I deserialize a JSON string into an NSDictionary? (For iOS 5+)
...
It looks like you are passing an NSString parameter where you should be passing an NSData parameter:
NSError *jsonError;
NSData *objectData = [@"{\"2\":\"3\"}" dataUsingEncoding:NSUTF8StringEncoding];
NSDictionary *json = [N...
How do you find the disk size of a Postgres / PostgreSQL table and its indexes
...relation_size('"' || table_schema || '"."' || table_name || '"') DESC;
Edit: Here's the query submitted by @phord, for convenience:
SELECT
table_name,
pg_size_pretty(table_size) AS table_size,
pg_size_pretty(indexes_size) AS indexes_size,
pg_size_pretty(total_size) AS total_size
F...
ImportError: No module named six
I'm trying to build OpenERP project, done with dependencies. It's giving this error now
7 Answers
...
How do I upgrade my ruby 1.9.2-p0 to the latest patch level using rvm?
...p0 (2010-08-18 revision 29036) [x86_64-darwin10.5.0] but I want to update it to the latest patch level using rvm. How can I do this?
...