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How to use double or single brackets, parentheses, curly braces
...y braces in Bash, as well as the difference between their double or single forms. Is there a clear explanation?
7 Answers
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What do the return values of node.js process.memoryUsage() stand for?
...pTotal } = process.memoryUsage();
console.log( 'rss', numeral(rss).format('0.0 ib'), heapTotal, numeral(heapTotal).format('0.0 ib') )
}
}
Running The above will give you something like this:
rss 22.3 MiB 4734976 4.5 MiB
rss 24.2 MiB 6483968 6.2 MiB
rss 27.6 MiB 9580544 9.1 MiB
rss 2...
B-Tree vs Hash Table
... link.
The difference between using a b-tree and a hash table is that the former allows you to use column comparisons in expressions that use the =, >, >=, <, <=, or BETWEEN operators, while the latter is used only for equality comparisons that use the = or <=> operators.
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Why can't variables be declared in a switch statement?
...atement. This means that you are left with a scope where a jump will be performed further into the code skipping the initialization.
The correct way to handle this is to define a scope specific to that case statement and define your variable within it:
switch (val)
{
case VAL:
{
// This wi...
Why do people write the #!/usr/bin/env python shebang on the first line of a Python script?
...nterpreter (and any flags it may need).
If you're talking about other platforms, of course, this rule does not apply (but that "shebang line" does no harm, and will help if you ever copy that script to a platform with a Unix base, such as Linux, Mac, etc).
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How to inject dependencies into a self-instantiated object in Spring?
...xchange.using('gps', function() { StackExchange.gps.track('embedded_signup_form.view', { location: 'question_page' }); });
$window.unbind('scroll', onScroll);
}
};
...
Rails: confused about syntax for passing locals to partials
...ed to specify :partial or :template
<%= render :partial => "rabbits/form", :locals => {...} %>
should work
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Are “while(true)” loops so bad? [closed]
...ava for several years now, but I just recently returned to school to get a formal degree. I was quite surprised to learn that, on my last assignment, I lost points for using a loop like the one below.
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PHP: How to remove all non printable characters in a string?
...Hot Tub Time Machine, and you're back in the eighties.
If you've got some form of 8 bit ASCII, then you might want to keep the chars in range 128-255. An easy adjustment - just look for 0-31 and 127
$string = preg_replace('/[\x00-\x1F\x7F]/', '', $string);
UTF-8?
Ah, welcome back to the 21st ce...
Why does Clojure have “keywords” in addition to “symbols”?
... are normally used to refer to something else. They can be used in program forms to refer to function parameters, let bindings, class names and global vars...
Keywords are generally used as lightweight "constant strings", e.g. for the keys of a hash-map or the dispatch values of a multimethod. Sy...