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Passing by reference in C
If C does not support passing a variable by reference, why does this work?
17 Answers
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How does a Breadth-First Search work when looking for Shortest Path?
..., and the preceding node in the shortest path. Initially all distances are set to infinity, and all predecessors are set to empty. In your example, you set A's distance to zero, and then proceed with the BFS. On each step you check if you can improve the distance of a descendant, i.e. the distance f...
Why was the arguments.callee.caller property deprecated in JavaScript?
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The this argument is a bit spurious, its value can be set by the call if it's important. Usually it's not used (at least, I've never had an issue with it in recursive functions). Calling the function by name has the same issues with this so I think it's irrelevant in regard to w...
Is Big O(logn) log base e?
For binary search tree type of data structures, I see the Big O notation is typically noted as O(logn). With a lowercase 'l' in log, does this imply log base e (n) as described by the natural logarithm? Sorry for the simple question but I've always had trouble distinguishing between the different...
Uncaught SyntaxError: Unexpected token with JSON.parse
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products is an object. (creating from an object literal)
JSON.parse() is used to convert a string containing JSON notation into a Javascript object.
Your code turns the object into a string (by calling .toString()) in order to try to parse it as JSON text....
SSL Error: CERT_UNTRUSTED while using npm command
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You can bypass https using below commands:
npm config set strict-ssl false
or set the registry URL from https or http like below:
npm config set registry="http://registry.npmjs.org/"
However, Personally I believe bypassing https is not the real solution, but we can use it a...
Get specific line from text file using just shell script
I am trying to get a specific line from a text file.
10 Answers
10
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How to convert a std::string to const char* or char*?
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Given C++03's .c_str()'s guarantees about the returned buffer are a super-set of .data()'s, you can always safely use .c_str(), but people sometimes don't because:
using .data() communicates to other programmers reading the source code that the data is not ASCIIZ (rather, you're using the string ...
When should I use C++14 automatic return type deduction?
...d, we have a compiler that supports automatic return type deduction, part of C++14. With -std=c++1y , I can do this:
7 An...
Integrating the ZXing library directly into my Android application
...;
try {
Bitmap bitmap = qrCodeEncoder.encodeAsBitmap();
imageView.setImageBitmap(bitmap);
} catch (WriterException e) {
e.printStackTrace();
}
Here is Contents.java
//
// * Copyright (C) 2008 ZXing authors
// *
// * Licensed under the Apache License, Version 2.0 (the "License");
// ...