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扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
... that app directly to add gestures. The app encodes gestures into a binary file, and this file can be read by the GestureLibraries class in Android API. After reading the file, all gestures are stored in a class called GestureLibrary. The gesture is performed by a class called GestureOverlayView, an...
Best way to simulate “group by” from bash?
Suppose you have a file that contains IP addresses, one address in each line:
14 Answers
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403 Forbidden vs 401 Unauthorized HTTP responses
...his status code for resources that are locked down by IP address ranges or files in my webroot that I don't want direct access to (i.e. a script must serve them).
– Kyle
May 9 '13 at 13:20
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How do I wrap text in a UITableViewCell without a custom cell
...ting correctly - solution was that I was loading my cell from a custom NIB file, which happens after the cell height in adjusted.
And I had my settings inside the NIB file to not wrap text, and only have 1 line for the label; the NIB file settings were overriding the settings I adjusted inside the ...
Keyboard shortcut to change font size in Eclipse?
...t will be zoomed.
So, the font size change is not limited to the current file and the new value of the font size is available here Window > Preferences > General > Appearance > Colors and Fonts.
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MySQL select 10 random rows from 600K rows fast
...ook back in 2010, they asked me how to select a random record from a huge file of unknown size, in one reading. Once you come up with an idea, it is easy to generalize it for selecting multiple records. So yes, sorting the entire file is ridiculous. At the same time, it is very handy. I just used ...
Wait for a process to finish
...Linux:
tail --pid=$pid -f /dev/null
Darwin (requires that $pid has open files):
lsof -p $pid +r 1 &>/dev/null
With timeout (seconds)
Linux:
timeout $timeout tail --pid=$pid -f /dev/null
Darwin (requires that $pid has open files):
lsof -p $pid +r 1m%s -t | grep -qm1 $(date -v+${time...
Analytics Google API Error 403: “User does not have any Google Analytics Account”
...adding the email address for my service account to the Google Analytics profile I wanted it to access.
I got the email address (something like xxxxxx@developer.gserviceaccount.com) for the service account by looking under the "API Access" tab in the Google APIs console.
Then, I followed Google's ins...
Find the IP address of the client in an SSH session
...y --help: A lightweight 'finger' program; print user information. The utmp file will be /var/run/utmp.
– Chris Woods
Feb 25 '13 at 17:49
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'printf' vs. 'cout' in C++
...hen you print many arguments. If you have to write something like Error 2: File not found., assuming error number, and its description is placeholder, the code would look like this. Both examples work identically (well, sort of, std::endl actually flushes the buffer).
printf("Error %d: %s.\n", id, ...