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Bash/sh - difference between && and ;
I normally use ; to combine more than one command in a line, but some people prefer && . Is there any difference? For example, cd ~; cd - and cd ~ && cd - seems to make the same thing. What version is more portable, e.g. will be supported by a bash-subset like Android's shell ...
How to extract custom header value in Web API message handler?
...lues = request.Headers.GetValues("MyCustomID");
var id = headerValues.FirstOrDefault();
There's also a TryGetValues method on Headers you can use if you're not always guaranteed to have access to the header.
share
...
How to create custom easing function with Core Animation?
... along a CGPath (QuadCurve) quite nicely in iOS. But I'd like to use a more interesting easing function than the few provided by Apple (EaseIn/EaseOut etc). For instance, a bounce or elastic function.
...
Get program execution time in the shell
...
Use the built-in time keyword:
$ help time
time: time [-p] PIPELINE
Execute PIPELINE and print a summary of the real time, user CPU time,
and system CPU time spent executing PIPELINE when it terminates.
The return status is the return s...
rsync error: failed to set times on “/foo/bar”: Operation not permitted
I'm getting a confusing error from rsync and the initial things I'm finding from web searches (as well as all the usual chmod'ing) are not solving it:
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Warning: “format not a string literal and no format arguments”
...
Are you nesting your brackets correctly? I don't think NSLog() likes taking only one argument, which is what you're passing it. Also, it already does the formatting for you. Why not just do this?
NSLog(@"%@ %@, %@",
errorMsgFormat,
error,
[err...
Parse email content from quoted reply
... usually email clients will put an "On such and such date so and so wrote" or prefix the lines with an angle bracket. Unfortunately, not everyone does this. Does anyone have any idea on how to programmatically detect reply text? I am using C# to write this parser.
...
Compare floats in php
... display the same value.
Usually you never compare floating-point values for equality like this, you need to use a smallest acceptable difference:
if (abs(($a-$b)/$b) < 0.00001) {
echo "same";
}
Something like that.
...
Difference between two lists
...xactly the right way to go. If your type overrides Equals and GetHashCode, or you're only interested in reference type equality (i.e. two references are only "equal" if they refer to the exact same object), you can just use:
var list3 = list1.Except(list2).ToList();
If you need to express a custo...
Closing Hg Branches
...pment has come to a dead end, and I don't want to be bothered with it any more.
Therefore, when a branch has been closed I shouldn't see it (in branches, heads, log, for instance) unless I explicitly ask to see closed branches.
I should note that I expect a closed branch to remain in the repo...