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Easy idiomatic way to define Ordering for a simple case class
...e class instances and I want to print them in predictable, lexicographical order using list.sorted , but receive "No implicit Ordering defined for ...".
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How to check if a file exists from inside a batch file [duplicate]
...ame here> (
rem file exists
) else (
rem file doesn't exist
)
Or on a single line (if only a single action needs to occur):
if exist <insert file name here> <action>
for example, this opens notepad on autoexec.bat, if the file exists:
if exist c:\autoexec.bat notepad c:\...
Quick easy way to migrate SQLite3 to MySQL? [closed]
...re is a list of converters (not updated since 2011):
https://www2.sqlite.org/cvstrac/wiki?p=ConverterTools (or snapshot at archive.org)
An alternative method that would work nicely but is rarely mentioned is: use an ORM class that abstracts specific database differences away for you. e.g. you ...
How do I add custom field to Python log format string?
My current format string is:
7 Answers
7
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What does T&& (double ampersand) mean in C++11?
...erences that were once true in the draft C++11 standard, but are not true for the final one! Specifically, it says at various points that rvalue references can bind to lvalues, which was once true, but was changed.(e.g. int x; int &&rrx = x; no longer compiles in GCC) – drewbarbs Jul 13 '1...
A simple example for someone who wants to understand Dynamic Programming [closed]
I am looking for a manageably understandable example for someone who wants to learn Dynamic Programming. There are nice answers here about what is dynamic programming . The fibonacci sequence is a great example, but it is too small to scratch the surface. It looks a great subject to learn about alt...
detach all packages while working in R
While working to solve another problem I got this problem:
10 Answers
10
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Solr vs. ElasticSearch [closed]
What are the core architectural differences between these technologies?
12 Answers
1...
Non-static method requires a target
I have a controller action that works fine on Firefox both locally and in production, and IE locally, but not IE in production. Here is my controller action:
...
Convert String[] to comma separated string in java
...ength > 0) {
StringBuilder nameBuilder = new StringBuilder();
for (String n : name) {
nameBuilder.append("'").append(n.replace("'", "\\'")).append("',");
// can also do the following
// nameBuilder.append("'").append(n.replace("'", "''")).append("',");
}
...