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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...
How to use arguments from previous command?
... Just a word of warning - if you use combined arguments like echo foo{,bar} baz, the command is recorded as printed and expands afterwards. With the above, using echo !:1 after resolves to echo foo{,bar} and then expands to echo foo foobar
– Sean
Jul 1...
Check existence of directory and create if doesn't exist
...exist")
# Handle this error as appropriate
}
Also be aware that if ~/foo doesn't exist then a call to dir.create('~/foo/bar') will fail unless you specify recursive = TRUE.
share
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improve thi...
Define global variable in a JavaScript function
...eclare a global variable:
<script>
var yourGlobalVariable;
function foo() {
// ...
}
</script>
Alternately, you can assign to a property on window:
<script>
function foo() {
window.yourGlobalVariable = ...;
}
</script>
...because in browsers, all global variable...
'AND' vs '&&' as operator
...perators, and with the same precedences. It allows for constructs such as $foo and bar(), which are nice shortcuts for if statements. If unexpected behaviour (from bad documentation, or not reading it) were a reason not to use something we wouldn't be talking about using PHP at all.
...
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...
Why can't Python's raw string literals end with a single backslash?
... Note: Workaround is to use adjacent literal concatentation. r"foo\bar\baz" "\\" (wrap in parens if ambiguous) will create a single literal at compile time, the first part of which is raw, and only the last tiny bit is non-raw, to allow the trailing backslash.
– Sha...
In Node.js, how do I “include” functions from my other files?
...are what you want to expose.
// tools.js
// ========
module.exports = {
foo: function () {
// whatever
},
bar: function () {
// whatever
}
};
var zemba = function () {
}
And in your app file:
// app.js
// ======
var tools = require('./tools');
console.log(typeof tools.foo); // =...
Is passing 'this' in a method call accepted practice in java
...le. In the specific example above it would be more sensible to Move Method foo to the Baz class to avoid having a bi-directional reference between the two classes and to bring the behaviour and the data together.
– JW.
Jul 3 '13 at 16:38
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