COW, short for copy on write, is a way to implement mutable strings so that creating strings and logically copying strings, is reduced to almost nothing; conceptually they become free operations like no-ops.
Basic idea: to share a data buffer among string instances, and only make a copy for a specific instance (the copy on write) when that instance's data is modified. The general cost of this is only an extra indirection for accessing the value of a string, so a COW implementation is highly desirable. And so the original C++ standard, C++98, and its correction C++03, had special support for COW implementations, and e.g. the g++ compiler's std::string implementations used COW.
So why was that support dropped in C++11?
In particular, would the same reason or reasons apply to a reference counted immutable string value class?
| /* Shadow 0dp */ | |
| box-shadow: none; | |
| /* Shadow 1dp */ | |
| box-shadow: 0 1px 1px 0 rgba(0,0,0,0.14), 0 2px 1px -1px rgba(0,0,0,0.12), 0 1px 3px 0 rgba(0,0,0,0.20); | |
| /* Shadow 2dp */ | |
| box-shadow: 0 2px 2px 0 rgba(0,0,0,0.14), 0 3px 1px -2px rgba(0,0,0,0.12), 0 1px 5px 0 rgba(0,0,0,0.20); | |
| /* Shadow 3dp */ |
I bundled these up into groups and wrote some thoughts about why I ask them!
If these helped you, I'd love to hear about it!! I'm on twitter @vcarl_ or send me an email carl.vitullo@gmail.com
https://blog.vcarl.com/interview-questions-onboarding-workplace/
- How long will it take to deploy my first change? To become productive? To understand the codebase?
- What kind of equipment will I be provided? Will the company pay/reimburse me if I want something specific?
sed -E -f solver.sed input where input is a file containing the maze.
For best results, resize your terminal to match the height of the maze. To disable animations, delete the lines containing p.
The solver assumes the following:
- The maze only contains the characters
# \nSE - Every line has the same number of characters
- There is only one start (
S) and end (E)
| /* | |
| * Copyright (C) 2018 The Android Open Source Project | |
| * | |
| * Licensed under the Apache License, Version 2.0 (the "License"); | |
| * you may not use this file except in compliance with the License. | |
| * You may obtain a copy of the License at | |
| * | |
| * http://www.apache.org/licenses/LICENSE-2.0 | |
| * | |
| * Unless required by applicable law or agreed to in writing, software |
| # use ImageMagick convert | |
| # the order is important. the density argument applies to input.pdf and resize and rotate to output.pdf | |
| convert -density 90 input.pdf -rotate 0.5 -attenuate 0.2 +noise Multiplicative -colorspace Gray output.pdf |
| /* | |
| * Copyright 2017 Google, Inc. | |
| * | |
| * Licensed under the Apache License, Version 2.0 (the "License"); | |
| * you may not use this file except in compliance with the License. | |
| * You may obtain a copy of the License at | |
| * | |
| * http://www.apache.org/licenses/LICENSE-2.0 | |
| * | |
| * Unless required by applicable law or agreed to in writing, software |
| .md-drop-shadow-lt { | |
| box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24); | |
| } | |
| .md-drop-shadow { | |
| box-shadow: 0 3px 6px rgba(0, 0, 0, 0.16), 0 3px 6px rgba(0, 0, 0, 0.23); | |
| } | |
| .md-drop-shadow-heavy { | |
| box-shadow: 0 10px 20px rgba(0, 0, 0, 0.19), 0 6px 6px rgba(0, 0, 0, 0.23); |