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How to convert a PNG image to a SVG? [closed]
.../bin/bash
File_png="${1?:Usage: $0 file.png}"
if [[ ! -s "$File_png" ]]; then
echo >&2 "The first argument ($File_png)"
echo >&2 "must be a file having a size greater than zero"
( set -x ; ls -s "$File_png" )
exit 1
fi
File="${File_png%.*}"
convert "$File_png" "$File.pnm" ...
How to uncompress a tar.gz in another directory
...ectory, you can simply cd into your target directory prior to calling tar; then you will have to give a complete path to your archive, of course. You can do this in a scoping subshell to avoid influencing the surrounding script:
mkdir foo
(cd foo; tar -xzf ../bar.tar.gz) # instead of ../ you can ...
Python loop that also accesses previous and next values
...ain(islice(nexts, 1, None), [None])
return izip(prevs, items, nexts)
Then use it in a loop, and you'll have previous and next items in it:
mylist = ['banana', 'orange', 'apple', 'kiwi', 'tomato']
for previous, item, nxt in previous_and_next(mylist):
print "Item is now", item, "next is", ...
Convert NSNumber to int in Objective-C
...numberWithInteger: myValue];
Decoding works with the integerValue method then:
NSInteger value = [number integerValue];
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Getting number of days in a month
...tDaysInMonth(int year,int month);
you have to pass year and month as int then days in month will be return on currespoting year and month
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Linux equivalent of the Mac OS X “open” command [closed]
... use this, add the following to your .bashrc file:
alias ']'='xdg-open'
Then, to open any resource, use it like any of these examples:
] www.google.com
] file.txt
] ~/Pictures
] ssh://myserver.local/home/jeremy
Also this lets you open a file browser (e.g. Nautilus) in the current directory:
]...
Can you use reflection to find the name of the currently executing method?
... a number of different properties. Also, it only returns one frame rather then the entire stack trace:
private string GetPropertyName()
{ //.SubString(4) strips the property prefix (get|set) from the name
return new StackFrame(1).GetMethod().Name.Substring(4);
}
It's a one-liner, too ;)
...
Split long commands in multiple lines through Windows batch file
...
@jeb, wrote up an example failing cmd script, but then found this question: stackoverflow.com/questions/4643376/…
– rjt
Apr 6 '16 at 12:46
1
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Is it possible to have SSL certificate for IP address, not domain name?
... It looks like my info may be out of date. I'll look into it more and then edit it if you are correct.
– regdoug
Dec 17 '16 at 23:44
...
How can I implement a tree in Python?
...ight.data = "right"
If you need an arbitrary number of children per node, then use a list of children:
class Tree:
def __init__(self, data):
self.children = []
self.data = data
left = Tree("left")
middle = Tree("middle")
right = Tree("right")
root = Tree("root")
root.children =...