Tuesday, June 21, 2016

Why does my facebook post keep showing an old photo for my ad? or: caching - How to clear Facebook's image cache - thanks to Stack Overflow

caching - How to clear Facebook's image cache - Stack Overflow



Q: I have a Facebook application that's created several wall-posts on behalf of my users. The image in the wall posts is cached by Facebook's servers. I've replaced the original image on my server and I would like to clear Facebook's image cache so all of the other wall posts update with the new image.
Original cached URL, now updated with new image.http://vcweb2.s3.amazonaws.com/assets/web/images/icon_square.png
Is this possible? Thanks!
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A: The way to "force" facebook to clear their cache for a specific url is to use the Debugger tool.
I tried using the debugger with the url of the image and it shows the new image and not the old one, though when trying the cached link you posted the old image still appears.
I suspect that if you try to post new posts the new icon will be used and not the old cached version, but that link you posted probably won't be changed.
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[Thanks again, stack exchange! - ed]

Wednesday, June 1, 2016

Make your iPhone run faster by clearing up RAM and cache

15 iPhone Tricks Apple Has Been Hiding From You

Your phone can do a lot of things, but can it do what you want it to? Maybe. The engineers and designers at Apple are determined to make the most user-friendly products and anticipate your needs as much as possible. However, they're not always the best at letting their customers know all the things their products can do.

And with every new iOS update comes more functionality. You might not even recognize the phone you bought — but in a good way.

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1. Set a sleep timer for your music.

If you like to drift off to peaceful slumber to serene, relaxing music, but you don't want it to keep playing long after you're asleep, you can set a timer through the Clock app.

2. Create your own custom vibration pattern.

You can tap out your own vibration pattern to customize it for certain contacts or for types of notifications. Just go to Settings>Sounds>Ringtones>Vibration>Create New Vibration and use your finger to tap out the pattern.

3. Flashing alerts.

If you're in a crowded restaurant and waiting on an important call, you could easily miss your ringtone or vibration. Take it up a notch by enabling the camera's LED for notifications through Settings>General>Accessibility.

4. Shake it to undo mistake-filled typing.

Just like an Etch-A-Sketch (for those of you who remember such things), you can just shake your phone to start over fresh when you make mistakes.

5. Make your phone run faster by clearing up RAM.

If you hold down the power button long enough to see the "slide to power off" prompt and then hold down the home button, the screen will go blank and then your home screen will re-appear.

6. Make your phone run faster by clearing the cache.

If clearing the RAM didn't help much, try clearing the cache. In any of the App Store, Podcasts, Music, Game Center, and Phone apps, tap any single icon along the bottom 10 times to clear the cache.

7. Check timestamps for text messages.

Isn't it annoying how your conversations seem to float free in time, without any relation to reality? Well, the time stamps for messages are actually there; they're just off the screen. Drag your thumb to the left to reveal the time stamps of each message.

8. See all the tabs you recently closed in Safari.

If you want to go back and reread or forward an article you closed recently, just hold down the "+" symbol at the bottom of the screen to have Safari open up a list.

9. Turn your iPhone into a level.

You don't need to download a third-party app, just launch the Compass app and swipe left.

10. Provide critical medical information in case of emergency.

You always knew your phone was a lifesaver, but now it literally could be. You don't necessarily want to rely on your phone to cough up important information when your life is on the line, but it's another helpful tool. Fill out the form under the Health app with as little or as much detail as you like; remember, this information is available without unlocking your phone, so only put in info that you're comfortable sharing.

11. See only unread emails in your inbox.

Because a cluttered inbox is the worst, open the Mail app and tap the Mailboxes link, then tap "Edit." Tap the circle next to "Unread" and you'll have a folder with only your unread emails.

12. Find out what flights are overhead.

Ever see a jet up in the sky and wonder where those folks are headed? As with so many things in life, just ask Siri and she'll come up with the answer.

13. Don't settle for bad wifi.

Is there anything more frustrating than a slow connection? You don't have to suffer through that nightmare anymore. Go to Settings>Cellular, scroll to the bottom, and turn Wifi Assist on. Just like that, if you're on a poor wifi connection, your phone will automatically switch back to your LTE connection. And if you're worried about a big bill for data at the end of the month, Wifi Assist won't activate with background downloading or with some third-party streaming apps.

14. Use Night Shift and Low Power Mode at the same time.

Apple introduced the low-light mode to be easier on the eyes after dark, but for some reason didn't want it to be active at the same time as Low Power Mode. Determined users have found a workaround, however. Once again, get Siri to do it. Specifically, activate Low Power Mode in Settings>Battery, then start Siri and ask her to enable Night Shift. Siri will warn you about having to turn off Low Power Mode to turn on Night Shift, but tell her to go ahead anyway. Before Siri confirms, press the sleep button. You should hear a confirmation beep and, when you unlock your phone again, Night Shift and Low Power Mode should be running at the same time.

15. Hard reset.

When absolutely nothing else will work, it's time for a hard reset. Sometimes your phone just needs a timeout. Hold down the home and lock buttons for five seconds or until the Apple symbol shows up and you'll be back in business.

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