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Why can't variable names start with numbers?
...nguage need to be able to readily (at a glance) distinguish variable names from numbers. If the first character didn't tell you -- instead, if you needed to search through the rest of the word to tell if there was a non-numeric alpha somewhere in there -- the code would be harder to read.
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HashMap to return default value for non-found keys?
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Just to be precise, you may want to adjust the condition from (v == null) to (v == null && !this.containsKey(k)) in case they purposely added a null value. I know, this is just a corner case, but the author may run into it.
– Adam Paynter
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What is the purpose of the “role” attribute in HTML?
...the unusual HTML client, the attribute needs to be set to one of the roles from the spec I linked. If you make up your own, this 'future' functionality can't work - a comment would be better.
Practicalities here: http://www.accessibleculture.org/articles/2011/04/html5-aria-2011/
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What's the difference between encoding and charset?
...or example in InputStreamReader, we read "An InputStreamReader is a bridge from byte streams to character streams: It reads bytes and decodes them into characters using a specified charset. The charset that it uses may be specified by name or may be given explicitly, or the platform's default charse...
How to create a backup of a single table in a postgres database?
...to restore my dump, I would look for ways to update the sequence's last id from a max(id) on my table. this is the answer that worked for and I am confident, looking at the generated sql, that I could have restored it.
– JL Peyret
Dec 28 '19 at 20:41
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How do I get the type of a variable?
...rpillars. (When you create an database application to open variable tables from 'unknown' databases you need to control field type to variable scheme and vice vera in a 'very' dymanic way ;) )
– TomeeNS
Sep 20 '17 at 14:02
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Create a CSV File for a user in PHP
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Here is an improved version of the function from php.net that @Andrew posted.
function download_csv_results($results, $name = NULL)
{
if( ! $name)
{
$name = md5(uniqid() . microtime(TRUE) . mt_rand()). '.csv';
}
header('Content-Type: text/csv'...
Rspec: “array.should == another_array” but without concern for order
...ke the order in account, so this is not an acceptable answer, is it? Quote from the docs: Passes if actual contains all of the expected regardless of order..
– Joshua Muheim
Jan 22 '13 at 15:44
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Why should I use a semicolon after every function in javascript?
...y required, but might wonder why?
Semicolons serve to separate statements from each other, and a FunctionDeclaration is not a statement.
FunctionDeclarations are evaluated before the code enters into execution, hoisting is a common word used to explain this behaviour.
The terms "function declarat...
Path.Combine for URLs?
...contoso.com");
Uri myUri = new Uri(baseUri, "catalog/shownew.htm");
Note from editor: Beware, this method does not work as expected. It can cut part of baseUri in some cases. See comments and other answers.
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