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How to keep up with the latest versions of Node.js in Ubuntu? PPA? Compiling?
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You could also use tools like for example nvm which can help you install node and even have multiple versions.
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Check whether a variable is a string in Ruby
...nd_of? will return true for instances from derived classes.
class X < String
end
foo = X.new
foo.is_a? String # true
foo.kind_of? String # true
foo.instance_of? String # false
foo.instance_of? X # true
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How to set the first option on a select box using jQuery?
.... <option></option> is not the same as an option with an empty-string value attribute i.e. <option value=""></option>, and you made it clear we need the value="" part 3) Even if there are no <option> with empty-string value; setting .val('') will "affect change", the se...
How does Rails keep track of which migrations have run for a database?
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Rails creates a table in your database called schema_migrations to keep track of which migrations have run.
The table contains a single column, version. When Rails runs a migration, it takes the leading digits in the migration's file name and inserts a row for that "version",...
Compare two objects in Java with possible null values
I want to compare two strings for equality when either or both can be null .
12 Answers
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How to convert an int array to String with toString method in Java [duplicate]
I am using trying to use the toString(int[]) method, but I think I am doing it wrong:
8 Answers
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Is System.nanoTime() completely useless?
...cific counter. Now consider the following case I use to measure time of a call:
15 Answers
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Where are the recorded macros stored in Notepad++?
...edited Jun 20 '18 at 20:26
Cos Callis
4,80533 gold badges2020 silver badges5555 bronze badges
answered Mar 25 '11 at 12:44
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What is the difference between substr and substring?
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The difference is in the second argument. The second argument to substring is the index to stop at (but not include), but the second argument to substr is the maximum length to return.
Links?
https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/String/substr
https://develop...
move_uploaded_file gives “failed to open stream: Permission denied” error
...ke the owner of those folders same as httpd process owner OR make them globally writable (bad practice).
Check apache process owner: $ps aux | grep httpd. The first column will be the owner typically it will be nobody
Change the owner of images and tmp_file_upload to be become nobody or whatever t...