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Xcode : failed to get the task for process
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Build Settings > Provisioning Profile set to 'None' works for debugging to device.
– David Douglas
Oct 2 '13 at 15:35
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How do Trigonometric functions work?
...aximum degree N to approximate a given function f(x) over an interval x0 < x < x1, is from Chebyshev approximation; see Numerical Recipes for a good discussion. Note that the Tj(x) and Tk(x) in the Wolfram article I linked to used the cos and inverse cosine, these are polynomials and in pract...
Why does ++[[]][+[]]+[+[]] return the string “10”?
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++[[]][+[]] => 1 // [+[]] = [0], ++0 = 1
[+[]] => [0]
Then we have a string concatenation
1+[0].toString() = 10
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Archives not showing up in Organizer for Xcode 4
... answer)
Try one of the following (or all)
Instead of using Build For -> Archive, in the product menu just use archive. It will show up then.
In the scheme editor, edit the scheme and go to the Archive tab, make sure the check box for show in Organizer is checked.
In the archive tab in the sch...
How to get execution time in rails console?
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With benchmark-ips gem:
2.3.0 :001 > require 'benchmark/ips'
=> true
2.3.0 :002 > Benchmark.ips do |x|
2.3.0 :003 > x.report("add: ") { 1+2 }
2.3.0 :004?> x.report("div: ") { 1/2 }
2.3.0 :005?> x.report("iis: ") { 1/2.0 }
2....
Is there “Break on Exception” in IntelliJ?
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In IntelliJ IDEA 14 go to:
Run -> View Breakpoints -> Check "Java Exceptions Breakpoints" -> Uncheck "Caught Exceptions"
If you do not uncheck Caught Exceptions the execution will be stopped every time the Java Framework throws an internal exceptio...
Python integer division yields float
...o get the result in double multiple 1.0 to "dividend or divisor"
100/35 => 2 #(Expected is 2.857142857142857)
(100*1.0)/35 => 2.857142857142857
100/(35*1.0) => 2.857142857142857
In Python 3
// => used for integer output
/ => used for double output
100/35 => 2.8571428571428...
How to add edge labels in Graphviz?
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You use the label property attached to the edge.
digraph G {
a -> b [ label="a to b" ];
b -> c [ label="another label"];
}
The above generates a graph that looks something like this.
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Reusing output from last command in Bash
... way of doing that is by using trap DEBUG:
f() { bash -c "$BASH_COMMAND" >& /tmp/out.log; }
trap 'f' DEBUG
Now most recently executed command's stdout and stderr will be available in /tmp/out.log
Only downside is that it will execute a command twice: once to redirect output and error to /...
SVN: Folder already under version control but not comitting?
...First try to add the project / maven module to Version Control
(Project -> Context Menu -> Team -> Add to Version Control)
You will see the following Eclipse error message:
org.apache.subversion.javahl.ClientException: Entry already exists
svn: 'PathToYouProject' is already under versi...