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How can I repeat a character in Bash?
...ay up to around 100, it's worth going with the Bash-only solutions, as the startup cost of external utilities matters, especially Perl's.
Pragmatically speaking, however, if you only need one instance of repeating characters, all existing solutions may be fine.
With large repeat counts, use exte...
Tool to generate JSON schema from JSON data [closed]
...
An easy and handy place to start. But note reported issues with jsonschema.net identified elsewhere on this page, and the reasons discussed for wanting an offline, or at least API-accessible, tool to include in development workflows, allow updating of ...
Failed to import new Gradle project: failed to find Build Tools revision *.0.0
...
After spending a few hours: I restarted the Android SDK Manager and at this time I noticed that I got Android SDK Platform-tools (upgrade) and Android SDK Build-tools (new).
After installing those, I was finally able to fully compile my project.
Note: The...
Scoping in Python 'for' loops
... want the total count in the end:
for count, x in enumerate(someiterator, start=1):
dosomething(count, x)
print "I did something {0} times".format(count)
Is this necessary? No. But, it sure is convenient.
Another thing to be aware of: in Python 2, variables in list comprehensions are leaked...
How to create PDFs in an Android app? [closed]
...ment document = new PrintedPdfDocument(context,
printAttributes);
// start a page
Page page = document.startPage(0);
// draw something on the page
View content = getContentView();
content.draw(page.getCanvas());
// finish the page
document.finishPage(page);
. . .
// add more pages
. . .
// w...
Saving a Numpy array as an image
....misc.imsave('outfile.jpg', image_array)
EDIT: The current scipy version started to normalize all images so that min(data) become black and max(data) become white. This is unwanted if the data should be exact grey levels or exact RGB channels. The solution:
import scipy.misc
scipy.misc.toimage(im...
Why does struct alignment depend on whether a field type is primitive or user-defined?
...f we add to 0000000003c22d18 + 8 bytes of string ref we will end up at the start of the first Int wrapper where the value actually point to the address we are at.
Now we can see that each value is an object reference again lets confirm that by peeking 0000000003c22d20.
0:004> !do 0000000003c22d...
What are these ^M's that keep showing up in my files in emacs?
... You did have to do both: a Carriage Return to get the typing point to the start of the line and a Line Feed to scroll one line down. The Mac OS Classic way (CR) on a typewriter would just keep overwriting the same line. The Unix way (LF) on a typewriter would output staggered text until you reach...
Logical operators (“and”, “or”) in DOS batch
...nt (used for setting variables or including parameters for a command).
To start Notepad and close the CMD window:
start notepad.exe & exit
To set variables x, y, and z to values if the variable 'a' equals blah.
IF "%a%"=="blah" (set x=1) & (set y=2) & (set z=3)
Hope that helps!
...
How do I set the proxy to be used by the JVM
...net/proxies.html
Set the JVM flags http.proxyHost and http.proxyPort when starting your JVM on the command line.
This is usually done in a shell script (in Unix) or bat file (in Windows). Here's the example with the Unix shell script:
JAVA_FLAGS=-Dhttp.proxyHost=10.0.0.100 -Dhttp.proxyPort=8800
ja...