Blog
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Snack Time Episode 2 – Our Biggest Pfand
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Amending Commits, Matplotlib, and More Python
I’ve been on vacation and spend the last two days catching up and not doing a lot of learning, so I’ve been lazy in putting up TIL posts. That is over. (I did, however, push some updates to my Apple Photos Analysis project.) Here is a small collection of things I learned in the last week.
Amending commits
Say you forgot to add a file to your last commit or you made a typo in your commit message. You can amend it!
Make the necessary changes, then do this:
git commit --amend -m "Commit message here"If you’ve already pushed it to an external repository, you’ll need to force the push since the external repo will look like it is ahead. If branch protection is turned on, you’ll need to make a new commit. Make sure you aren’t overwriting anything important!
git push origin master --force
Adding data labels to the top of bar charts in Matplotlib
Matplotlib is a great plotting library for Python.
def autolabel(rects): # attach some text labels for rect in rects: height = rect.get_height() plt.text(rect.get_x() + rect.get_width()/2., 5+height, '%d' % int(height), ha='center', va='bottom') rect = plt.bar(xs, counted_hours, color=color) # To use: autolabel(rect)
Saving images in matplotlib
plt.savefig('directory/filename.png')
Counting items that match a regex pattern
def hour_finder(regex,lines): time_counter = 0 for l in lines: if re.match(regex, l): time_counter = time_counter + 1 return time_counter # To use hour_finder('^8:[0-9]{2,}:[0-9]{2,}sPM',time_csv)
Splitting!
Splitting by a space
' 'and choose the item after the split ([1]because counting starts at 0)list = [i.split(' ')[1] for i in time_csv] -
Toggling divs with jQuery
Toggling divs with jQuery
This isn’t new, but I use it enough that I like to keep a basic snippet handy.
This does the following:
- Hides
div-1anddiv-2on page load. - Opens
div-1and closesdiv-2whenbutton-1is clicked - Opens
div-2and closesdiv-1whenbutton-2is clicked
$( document ).ready(function() { $('.div-1').hide(); $('.div-2').hide(); $('.button-1').click(function() { $('.div-1').slideDown(); $('.div-2').slideUp(); }); $('.button-1').click(function() { $('.div-1').slideDown(); $('.div-2').slideUp(); }); });See it in action below. Styling the buttons will be left as an exercise to the reader:
This is Div-1!!!
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Phasellus tempus, mauris in sollicitudin commodo, eros mauris euismod arcu, eget faucibus enim tellus a turpis. Suspendisse malesuada interdum elit sit amet rutrum. Nam ut elit lobortis, lobortis nisi sed, tincidunt nibh. In consequat eleifend quam, vestibulum efficitur velit scelerisque nec. Quisque quis rutrum mauris, ut ultricies ipsum. Cras interdum ipsum in diam venenatis fermentum. Vestibulum ante ipsum primis in faucibus orci luctus et ultrices posuere cubilia Curae; Donec mollis tincidunt est vitae dapibus. Aenean cursus, ipsum ac pellentesque malesuada, mauris magna pretium nunc, eu mollis dolor ipsum sit amet felis. Vestibulum sed erat eu dolor condimentum viverra blandit sit amet mauris. In arcu nisi, sollicitudin a dui a, laoreet pellentesque libero.
Woah, this is Div-2!~!~!
Suspendisse bibendum sem vitae tellus maximus dictum. Nunc vestibulum tellus sem, sit amet efficitur ligula porta sed. Aliquam erat volutpat. Suspendisse in enim elementum, iaculis magna eu, placerat enim. Aliquam auctor ultricies ligula eleifend sodales. Vestibulum at leo leo. Praesent sollicitudin ipsum ut maximus malesuada.
If you copied this example and it isn’t working, make sure you gave the divs and buttons the correct classes and you included jQuery in your header:
- Hides
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Javascript Counter
Today I learned:
Javascript Counter
The results:
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days
00
hours
00
minutes
00
seconds
The javascript, which counts the time since a certain date:
document.addEventListener("DOMContentLoaded", function(event) { // Month,Day,Year,Hour,Minute,Second upTime('Nov,10,2015,00:00:00'); }); function upTime(countTo) { now = new Date(); countTo = new Date(countTo); difference = (now-countTo); days=Math.floor(difference/(60*60*1000*24)*1); hours=Math.floor((difference%(60*60*1000*24))/(60*60*1000)*1); mins=Math.floor(((difference%(60*60*1000*24))%(60*60*1000))/(60*1000)*1); secs=Math.floor((((difference%(60*60*1000*24))%(60*60*1000))%(60*1000))/1000*1); document.getElementById('days').firstChild.nodeValue = days; document.getElementById('hours').firstChild.nodeValue = hours; document.getElementById('minutes').firstChild.nodeValue = mins; document.getElementById('seconds').firstChild.nodeValue = secs; clearTimeout(upTime.to); upTime.to=setTimeout(function(){ upTime(countTo); },1000); }The elements it targets:
