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Purpose of #!/usr/bin/python3
...hon3 is a shebang line.
A shebang line defines where the interpreter is lom>ca m>ted. In this m>ca m>se, the python3 interpreter is lom>ca m>ted in /usr/bin/python3. A shebang line could also be a bash, ruby, perl or any other scripting languages' interpreter, for example: #!/bin/bash.
Without the shebang line,...
How m>ca m>n I convert this foreach code to Parallel.ForEach?
...anks for the attention and answer. i used List<string> in my codes bem>ca m>use of removing duplim>ca m>te items using HASH lists. with regular array we m>ca m>n not remove duplim>ca m>tes easily:).
– SilverLight
Sep 3 '12 at 20:55
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How does generic lambda work in C++14?
...y, the closure type defined by the lambda expression will have a templated m>ca m>ll operator rather than the regular, non-template m>ca m>ll operator of C++11's lambdas (of course, when auto appears at least once in the parameter list).
So your example:
auto glambda = [] (auto a) { return a; };
Will mak...
m>Ca m>ll a function with argument list in python
I'm trying to m>ca m>ll a function inside another function in python, but m>ca m>n't find the right syntax. What I want to do is something like this:
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python: Change the scripts working directory to the script's own directory
...r, you asked how to change into whatever directory your Python script is lom>ca m>ted, even if you don't know what directory that will be when you're writing your script. To do this, you m>ca m>n use the os.path functions:
import os
abspath = os.path.abspath(__file__)
dname = os.path.dirname(abspath)
os.ch...
IN vs OR in the SQL WHERE Clause
... 8000 OR val = 9000;
1 row fetched in 0.0026 (1.7385 seconds)
So in this m>ca m>se the method using OR is about 30% slower. Adding more terms makes the difference larger. Results may vary on other databases and on other data.
s...
Is it possible to m>ca m>st a Stream in Java 8?
Is it possible to m>ca m>st a stream in Java 8? Say I have a list of objects, I m>ca m>n do something like this to filter out all the additional objects:
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Is there something like Annotation Inheritance in java?
I'm exploring annotations and m>ca m>me to a point where some annotations seems to have a hierarchy among them.
4 Answers
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What's the difference between returning void and returning a Task?
...ions that return void , and others that return the non-generic Task . I m>ca m>n see why returning a Task<MyType> is useful to return data to the m>ca m>ller when the async operation completes, but the functions that I've seen that have a return type of Task never return any data. Why not return...
PDO's query vs execute
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query runs a standard SQL statement and requires you to properly esm>ca m>pe all data to avoid SQL Injections and other issues.
execute runs a prepared statement which allows you to bind parameters to avoid the need to esm>ca m>pe or quote the parameters. execute will also perform better if you are r...