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How to evaluate a math expression given in string form?
...);
ScriptEngine engine = mgr.getEngineByName("JavaScript");
String foo = "40+2";
System.out.println(engine.eval(foo));
}
}
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fol...
How to design a multi-user ajax web application to be concurrently safe
...nt to poll independently or full datasets "artifact x has changed to value foo"
javascript artifact-updater does what it can to fetch new values as soon as they become known to have updated. It executes new ajax requests or gets feeded by the javascript client.
The pages DOM-content is updated, the ...
Hidden Features of Xcode
...
Use #pragma for organization
You can use:
#pragma mark Foo
... as a way to organize methods in your source files. When browsing symbols via the pop up menu, whatever you place in Foo will appear bold in the list.
To display a separator (i.e. horizontal line), use:
#pragma mar...
Maven parent pom vs modules pom
...lugin:goal format from your internal repository. For example, you can have foo-maven-plugin with the groupId of org.example providing goal generate-foo. If you try to run it from the project root using command like mvn org.example:foo-maven-plugin:generate-foo, it will fail to run on the aggregate m...
Skip the headers when editing a csv file using Python
...hich "skips" the header row and uses it to allowed named indexing.
Given "foo.csv" as follows:
FirstColumn,SecondColumn
asdf,1234
qwer,5678
Use DictReader like this:
import csv
with open('foo.csv') as f:
reader = csv.DictReader(f, delimiter=',')
for row in reader:
print(row['Fir...
Get __name__ of calling function's module in Python
Suppose myapp/foo.py contains:
3 Answers
3
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Command line: piping find results to rm
...lag a try. I'm passing a full path but getting back "/usr/www2/bar/htdocs/foo/rsync/httpdocs/db_backups/: relative path potentially not safe". Any idea why?
– jerrygarciuh
Jun 25 '12 at 15:25
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How to select only the first rows for each unique value of a column
...serted) AS First
FROM
MyTable
GROUP BY
CName
) foo
JOIN
MyTable M ON foo.CName = M.CName AND foo.First = M.Inserted
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Updating address bar with new URL without hash or reloading the page
...port - which is a lot of work when you could just make it a relative URL ("foo.html" or even "/foo.html") and let the browser take care of it.
– DimeCadmium
Jun 17 '18 at 5:20
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What is the difference between self-types and trait subclasses?
...a> trait DummyUser extends User {
| override def name: String = "foo"
| }
defined trait DummyUser
scala> trait Right extends Tweeter with User {
| val canDo = name
| }
defined trait Right
scala> trait RightAgain extends Tweeter with DummyUser {
| val canDo ...