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How to round up the result of integer division?
...ds + recordsPerPage - 1) / recordsPerPage;
Source: Number Conversion, Roland Backhouse, 2001
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Differences between Line and Branch coverage
...comments, conditionals, etc). Branch coverages checks if you took the true and false branch for each conditional (if, while, for). You'll have twice as many branches as conditionals.
Why do you care? Consider the example:
public int getNameLength(boolean isCoolUser) {
User user = null;
if ...
How to get a cross-origin resource sharing (CORS) post request working
...has two web servers. The first is the in-built one in XBMC (on port 8080) and displays our library. The second server is a CherryPy python script (port 8081) that I am using to trigger a file conversion on demand. The file conversion is triggered by a AJAX POST request from the page served from t...
Why modelVersion of pom.xml is necessary and always set to 4.0.0?
...
It is always set to 4.0.0 in Maven 2 and 3, because, at present, there is no other model.
Notice that modelVersion contains 4.0.0. That is currently the only supported POM version, and is always required. [source]
But it wouldn't necessarily need to always...
Javascript Functions and default parameters, not working in IE and Chrome
...u can't do this, but you can instead do something like:
function saveItem(andClose) {
if(andClose === undefined) {
andClose = false;
}
}
This is often shortened to something like:
function setName(name) {
name = name || 'Bob';
}
Update
The above is true for ECMAScript <= 5. E...
How can I get the latest JRE / JDK as a zip file rather than EXE or MSI installer? [closed]
... that everything will work just by copying the contents of the Java folder and setting the environment variables.
30 Answer...
cartesian product in pandas
I have two pandas dataframes:
11 Answers
11
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Why is there no GIL in the Java Virtual Machine? Why does Python need one so bad?
...t need a GIL (which is why it can perfectly be implemented on JVM [Jython] and .NET [IronPython], and those implementations multithread freely). CPython (the popular implementation) has always used a GIL for ease of coding (esp. the coding of the garbage collection mechanisms) and of integration of ...
How does one use rescue in Ruby without the begin and end block
I know of the standard technique of having a begin rescue end
5 Answers
5
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Update multiple rows in same query using PostgreSQL
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You can also use update ... from syntax and use a mapping table. If you want to update more than one column, it's much more generalizable:
update test as t set
column_a = c.column_a
from (values
('123', 1),
('345', 2)
) as c(column_b, column_a)
wher...