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How can I have a newline in a string in sh?
...lity, doing away with all the problems.
So to get a newline in a string:
FOO="hello
world"
BAR=$(printf "hello\nworld\n") # Alternative; note: final newline is deleted
printf '<%s>\n' "$FOO"
printf '<%s>\n' "$BAR"
There! No SYSV vs BSD echo madness, everything gets neatly printed and...
cscope or ctags why choose one over the other? [closed]
...hod is defined or implemented. The second feature means that when you type foo. or foo->, and if foo is a structure, then a pop-up menu with field completion will be shown.
cscope also has the first feature - using set cscopetag - but not the last. However cscope additionally adds the ability to...
How to un-submodule a Git submodule?
...re about to merge into: ie. if your submodule in the main repository is in foo/, in the submodule, perform mkdir foo && git mv !(foo) foo && git commit.
– Chris Down
Oct 11 '13 at 7:27
...
Why is there no logical xor in JavaScript?
...
there is... sort of:
if( foo ? !bar : bar ) {
...
}
or easier to read:
if( ( foo && !bar ) || ( !foo && bar ) ) {
...
}
why? dunno.
because javascript developers thought it would be unnecessary as it can be expressed by oth...
How to change the type of a field?
...omment below. Change the field bad from a number to a string in collection foo.
db.foo.find( { 'bad' : { $type : 1 } } ).forEach( function (x) {
x.bad = new String(x.bad); // convert field to string
db.foo.save(x);
});
...
How do I escape spaces in path for scp copy in Linux?
...
Also you can do something like:
scp foo@bar:"\"apath/with spaces in it/\""
The first level of quotes will be interpreted by scp and then the second level of quotes will preserve the spaces.
...
What optimizations can GHC be expected to perform reliably?
...hy are you worrying about it?)
Case expressions
Consider the following:
foo (0:_ ) = "zero"
foo (1:_ ) = "one"
foo (_:xs) = foo xs
foo ( []) = "end"
The first three equations all check whether the list is non-empty (among other things). But checking the same thing thrice is wasteful. Fortunate...
Add to Array jQuery
...his has nothing to do with jQuery though.
var myArray = [];
myArray.push("foo");
// myArray now contains "foo" at index 0.
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GCC dump preprocessor defines
...defined in your version of the
preprocessor. Assuming you have no
file foo.h, the command
touch foo.h; cpp -dM foo.h
will show all the predefined macros.
If you use -dM without the -E option,
-dM is interpreted as a synonym for -fdump-rtl-mach.
...
How to bind function arguments without binding this?
...l(this, ...boundArgs, ...args); };
};
Then, for a specified function foo and an object obj, the statement
return foo.call(obj, 1, 2, 3, 4);
is equivalent to
let bar = foo.bindArgs(1, 2);
return bar.call(obj, 3, 4);
where only the first and second arguments are bound to bar, while the con...