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How to smooth a curve in the right way?
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I prefer a Savitzky-Golay filter. It uses least squares to regress a small window of your data onto a polynomial, then uses the polynomial to estimate the point in the center of the window. Finally the window is shifted forward by one data point and the process repeats. This continues until ever...
Double vs. BigDecimal?
...tudes (say d1=1000.0 and d2=0.001) could result in the 0.001 being dropped alltogether when summing as the difference in magnitude is so large. With BigDecimal this would not happen.
The disadvantage of BigDecimal is that it's slower, and it's a bit more difficult to program algorithms that way (du...
Uint8Array to string in Javascript
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For anyone lazy like me, npm install text-encoding, var textEncoding = require('text-encoding'); var TextDecoder = textEncoding.TextDecoder;. No thanks.
– Evan Hu
Nov 29 '16 at 6:11
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How do I get currency exchange rates via an API such as Google Finance? [closed]
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Thanks for all your answers.
Free currencyconverterapi:
Rates updated every 30 min
API key is now required for the free server.
A sample conversion URL is: http://free.currencyconverterapi.com/api/v5/convert?q=EUR_USD&compact=y
F...
iOS: how to perform a HTTP POST request?
...ction *)connection didFailWithError:(NSError *)error {
[[[[UIAlertView alloc] initWithTitle:NSLocalizedString(@"Error", @"")
message:[error localizedDescription]
delegate:nil
cancelButtonTitle:NSLocalizedStri...
Share variables between files in Node.js?
...maybe an exception or two out there...). In this case, it looks like you really just want to export your "name" variable. E.g.,
// module.js
var name = "foobar";
// export it
exports.name = name;
Then, in main.js...
//main.js
// get a reference to your required module
var myModule = require('./...
How can I debug git/git-shell related problems?
...SS=2 GIT_TRACE_PACKET=2 GIT_TRACE_PACKFILE=2 GIT_TRACE_SETUP=2 GIT_TRACE_SHALLOW=2 git pull origin master -v -v; set +x
– Paul Irish
Jan 9 '16 at 21:22
2
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Getting the name of the currently executing method
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Thread.currentThread().getStackTrace() will usually contain the method you’re calling it from but there are pitfalls (see Javadoc):
Some virtual machines may, under some circumstances, omit one or more stack frames from the stack trace. In the extreme case, a virtua...
Handler vs AsyncTask vs Thread [closed]
...so supports reporting progress of the running tasks.
And a Thread is basically the core element of multithreading which a developer can use with the following disadvantage:
If you use Java threads you have to handle the following requirements
in your own code:
Synchronization with the...
Is it better to use Enumerable.Empty() as opposed to new List() to initialize an IEnumerable
...uld be noticeable impact.
Enumerable.Empty does not create an object per call thus putting less load on GC.
If the code is in low-throughput location, then it boils down to aesthetic considerations though.
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