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When to add what indexes in a table in Rails
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edited Jul 10 '18 at 12:50
answered Sep 7 '10 at 13:17
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How do I clear all options in a dropdown box?
...DropList");
var length = select.options.length;
for (i = length-1; i >= 0; i--) {
select.options[i] = null;
}
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Setting property 'source' to 'org.eclipse.jst.jee.server:JSFTut' did not find a matching property
...ed webapplication with an project in the workspace. Since Tomcat version 6.0.16, any unspecified XML tags and attributes in the server.xml will produce a warning during Tomcat's startup, even though there is no DTD nor XSD for server.xml.
Just ignore it. Your web project is fine. It should run fine...
git cherry-pick says “…38c74d is a merge but no -m option was given”
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The way a cherry-pick works is by taking the diff a changeset represents (the difference between...
SVN how to resolve new tree conflicts when file is added on two branches
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As was mentioned in an older version (2009) of the "Tree Conflict" design document:
XFAIL confl...
What are the differences between Clojure, Scheme/Racket and Common Lisp?
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They all have a lot in common:
Dynamic languages
Strongly typed
Compiled
Lisp-style syntax, i...
Convert String to Float in Swift
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Swift 2.0+
Now with Swift 2.0 you can just use Float(Wage.text) which returns a Float? type....
Using awk to print all columns from the nth to the last
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will print all but very first column:
awk '{$1=""; print $0}' somefile
will print all but two first columns:
awk '{$1=$2=""; print $0}' somefile
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Re-ordering columns in pandas dataframe based on column name [duplicate]
I have a dataframe with over 200 columns. The issue is as they were generated the order is
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