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JavaScript hashmap equivalent
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Update in 2014: Answered back in 2008 this simple solution still requires more explanations. Let me clarify the idea in a Q&A form.
Your solution doesn't have a real hash. Where is it???
JavaScript is a high-level language. Its basic primitive (Object) includes a hash table to keep properties. ...
“INSERT IGNORE” vs “INSERT … ON DUPLICATE KEY UPDATE”
... ANSI SQL 2003 defines a MERGE statement that can solve the same need (and more), but MySQL does not support the MERGE statement.
A user tried to edit this post (the edit was rejected by moderators). The edit tried to add a claim that INSERT...ON DUPLICATE KEY UPDATE causes a new auto-increment ...
What is Weak Head Normal Form?
...mory stats with :set +s. You can then see that foldl' f ends up allocating more thunks than foldl' f'.
– hammar
Jun 2 '17 at 15:34
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How can I list all commits that changed a specific file?
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+1 --follow accounts for renames, so this is more robust than git log -- path
– Gabe Moothart
Aug 7 '13 at 21:09
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What is the JavaScript >>> operator and how do you use it?
...sts against using such things). It doesn't mean that its wrong to do, but more favorable and familiar methods exist to make code more readable. A more clear way to ensure that len is 0 is either of the following two methods.
// Cast this.length to a number
var len = +this.length;
or
// Cast thi...
pyplot scatter plot marker size
...uare of width, doubling the width actually appears to increase the size by more than a factor 2 (in fact it increases it by a factor of 4). To see this consider the following two examples and the output they produce.
# doubling the width of markers
x = [0,2,4,6,8,10]
y = [0]*len(x)
s = [20*4**n for...
jQuery event handlers always execute in order they were bound - any way around this? [duplicate]
...hich these items were attached can soon get out of hand as you keep adding more and more of these ordered events.
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Why do I get “'property cannot be assigned” when sending an SMTP email?
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@Oskar Okay, so I should have been more specific. You cannot set the mail.to to a specific address. You must use the constructor or call add. I was only addressing the first compiler warning: Error CS0200: Property or indexer 'System.Net.Mail.MailMessage.To...
What is tail recursion?
..., this answer does show the concept (almost) correctly. It would have been more clearly a tail call, if the "else:" were omitted. Wouldn't change the behavior, but would place the tail call as an independent statement. I will submit that as an edit.
– ToolmakerSteve
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