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How to implement Enums in Ruby?
...to enhance readability without littering code with literal strings.
postal_code[:minnesota] = "MN"
postal_code[:new_york] = "NY"
Constants are appropriate when you have an underlying value that is important. Just declare a module to hold your constants and then declare the constants within that.
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How to convert a Django QuerySet to a list
...
You could do this:
import itertools
ids = set(existing_answer.answer.id for existing_answer in existing_question_answers)
answers = itertools.ifilter(lambda x: x.id not in ids, answers)
Read when QuerySets are evaluated and note that it is not good to load the whole result int...
URL-parameters and logic in Django class-based views (TemplateView)
...re using a TemplateView which means that you would do the logic in your get_context_data override.
– Ngenator
Apr 2 '13 at 12:58
4
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Continuously read from STDOUT of external process in Ruby
...hether at the time ehsanul answered the question, there was Open3::pipeline_rw() available yet, but it really makes things simpler.
I don't understand ehsanul's job with Blender, so I made another example with tar and xz. tar will add input file(s) to stdout stream, then xz take that stdout and co...
Downloading a picture via urllib and python
...I have found this answer and I edit that in more reliable way
def download_photo(self, img_url, filename):
try:
image_on_web = urllib.urlopen(img_url)
if image_on_web.headers.maintype == 'image':
buf = image_on_web.read()
path = os.getcwd() + DOWNLOADED_I...
How often does python flush to a file?
...larger (I wanted open('file.txt', 'w', 512)) it buffers the full io.DEFAULT_BUFFER_SIZE of 8192. Is that a Python bug, a Linux bug, or an ID10t bug?
– Bruno Bronosky
Dec 1 '17 at 17:00
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How to create a custom-shaped bitmap marker with Android map API v2 [duplicate]
...aw more complex and fancier stuff:
Bitmap.Config conf = Bitmap.Config.ARGB_8888;
Bitmap bmp = Bitmap.createBitmap(80, 80, conf);
Canvas canvas1 = new Canvas(bmp);
// paint defines the text color, stroke width and size
Paint color = new Paint();
color.setTextSize(35);
color.setColor(Color.BLACK);
...
How to check if object (variable) is defined in R?
...:(which(search() == "tools:rstudio") - 1L),
function(pp) exists(_object_name_, where = pp, inherits = FALSE)))
Compare replacing _object_name_ with "data.table" (TRUE) vs. "var" (FALSE)
(of course, if you're not on RStudio, I think the first automatically attached environment is "packa...
Escape quotes in JavaScript
...isplay = document.getElementById('output');
var str = 'class="whatever-foo__input" id="node-key"';
display.innerHTML = str.replace(/[\""]/g, '\\"');
//will return class=\"whatever-foo__input\" id=\"node-key\"
<span id="output"></span>
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How to unzip a file using the command line? [closed]
...mmand "Expand-Archive '.\file.zip' '.\unziped\'"
– AK_
Mar 17 '18 at 21:11
@AK_ what about Windows 8 or 8.1?
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