- The first step in figuring out the solution is to first…open a file and then once we have a file opened,…we're going to decode it,…so that we can get the image data out of it.…And then after that, I'm going to show you some…file info, which is one of the steps I took…in putting my solution together.…Didn't turn out to really help me, but I thought…I'd leave it in so you could see it.…So the first thing we do is we open a file,…we use os.Open to do that.…It gives us a pointer to a file.…We have to defer closing that file.…Because we've opened a file, we want to make sure…it closes, and we use defer to do that.…
And if we just print this out, we get the address…to the file because it's a pointer to a file,…the address where the file information is kept.…So we do go run main.go.…We see the pointer to the file; we've already seen all that.…The next we do is now that we have our file open,…we want to read the data for that file.…So I use ioutil.ReadAll,…and iouti.ReadAll takes a reader.…I want to take a moment and just revisit how…
Author
Released
2/16/2016Todd introduces challenges and then provides overviews of his solutions in Go. Challenges include topics such as statistical analysis, searching directories for images, and accessing peripheral devices.
Visit other courses in the series to see how to solve the same challenges in languages like C++, C#, JavaScript, PHP, Python, R, Ruby, and Swift.
Skill Level Beginner
Duration
Views
The files have moved, and I can't access them via HTTP as shown in the course.
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Learning Go
with David Gassner3h 48m Beginner
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Introduction
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Welcome1m 11s
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Why choose Go?4m 33s
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1. Problem 1—Exploring Lake Pend Oreille
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Exploring Lake Pend Oreille3m 43s
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Solution overview1m 31s
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Working with files9m 20s
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Reading file contents7m 45s
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Calculating mean6m 16s
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Calculating median6m 27s
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Retrieving files using HTTP7m 31s
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2. Problem 2—Image Analysis
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Image analysis2m 54s
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Solution overview8m 44s
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Working with images10m 25s
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Finished solution1m 2s
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3. Problem 3—Eight Queens
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Eight queens1m 50s
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Solution overview3m 27s
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Designing our alogrithm4m 10s
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4. Problem 4—Accessing Peripherals
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Accessing peripherals1m 23s
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Solution overview5m 9s
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Mouse input and audio output4m 19s
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Solution4m 28s
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5. Problem 5—Recursion and Directories
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Solution overview5m 48s
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Understanding recursion7m 53s
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6. Problem 6—Building the Web
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Building the web1m 32s
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Solution overview3m 13s
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Understanding templating3m 35s
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Parsing data7m 15s
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Video: Working with images