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What does “hashable” mean in Python?
I tried searching internet but could not find the meaning of hashable.
9 Answers
9
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Comparing Dates in Oracle SQL
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As a_horse_with_no_name noted in the comments, DEC, doesn't necessarily mean December. It depends on your NLS_DATE_LANGUAGE and NLS_DATE_FORMAT settings. To ensure that your comparison with work in any locale you can use the datetime format model MM instead
The year '95 is inexact. You know you ...
SQL WHERE ID IN (id1, id2, …, idn)
... performance.
Update: Although you could use a temporary table, I did not mean to imply that you must or even should. A permanent table used for temporary data is a common solution with merits beyond that described here.
sh...
What does [object Object] mean?
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Usually, when you're talking about "objects" in Javascript, you actually mean "Object objects", and not the other types.
where stringify should look like this:
function stringify (x) {
console.log(Object.prototype.toString.call(x));
}
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What does the KEY keyword mean?
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Notation {INDEX|KEY} in general does not mean that INDEX and KEY have the same meaning, or KEY is an INDEX ;)
– sergtk
Jan 4 '14 at 0:45
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Behaviour of increment and decrement operators in Python
... The immutability claim is spurious. Conceptually, i++ would mean to assign i + 1 to the variable i. i = 5; i++ means to assign 6 to i, not modify the int object pointed to by i. That is, it does not mean to increment the value of 5!
– Mechanical snail
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What part of Hindley-Milner do you not understand?
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The horizontal bar means that "[above] implies [below]".
If there are multiple expressions in [above], then consider them anded together; all of the [above] must be true in order to guarantee the [below].
: means has type
∈ means is in. (Like...
Accessing Object Memory Address
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What does an object's lifetime (and what does it mean for lifetime to overlap/not overlap) refer to in this context?
– Minh Tran
May 31 '18 at 14:42
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How to check task status in Celery?
..._track_started to True, then the state will be STARTED.
The state PENDING means "I don't know."
An AsyncResult with the state PENDING does not mean anything more than that Celery does not know the status of the task. This could be because of any number of reasons.
For one thing, AsyncResult can b...
Querying DynamoDB by date
...xes to aid in this sort of query. Secondary indexes can either be global, meaning that the index spans the whole table across hash keys, or local meaning that the index would exist within each hash key partition, thus requiring the hash key to also be specified when making the query.
For the use c...