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How to create ENUM type in SQLite?
I need to convert a table from MySQL to SQLite, but I can't figure out how to convert an enum field, because I can't find ENUM type in SQLite.
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What are all possible pos tags of NLTK?
...abler if others are like me, I had wrong expectations. I expected a lookup table/list/map, mapping the pos acronyms like RB to their meaning like adverb. (Here is an example; or see @Suzana's answer, which links the Penn Treebank Tag Set). But you're right, the builtin nltk.help.upenn_tagset('RB')is...
What is the difference between memoization and dynamic programming?
...g all related sub-problems first, typically by filling up an n-dimensional table. Based on the results in the table, the solution to the "top" / original problem is then computed.
If you use memoization to solve the problem you do it by maintaining a map of already solved sub problems. You do it "t...
Reason for Column is invalid in the select list because it is not contained in either an aggregate f
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Suppose I have the following table T:
a b
--------
1 abc
1 def
1 ghi
2 jkl
2 mno
2 pqr
And I do the following query:
SELECT a, b
FROM T
GROUP BY a
The output should have two rows, one row where a=1 and a second row where a=2.
But wha...
Unknown column in 'field list' error on MySQL Update query
...er inside single quotes; e.g.:
$name = "my name"
$query = " INSERT INTO mytable VALUES ( 1 , '$name') "
Note that although the query is enclosed between double quotes, you must enclose any string in single quotes.
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UPDATE and REPLACE part of a string
I've got a table with two columns, ID and Value . I want to change a part of some strings in the second column.
9 Answer...
Simple basic explanation of a Distributed Hash Table (DHT)
...tore a particular key is found by hashing that key, so in effect your hash-table buckets are now independent nodes in a network.
This gives a lot of fault-tolerance and reliability, and possibly some performance benefit, but it also throws up a lot of headaches. For example, what happens when a nod...
Why do my list item bullets overlap floating elements
...e CSS below to make the list work alongside the floated content.
display: table; works alongside floated content (filling the gap) but without hiding content behind it. Much like a table does :-)
.img {
float: left;
}
.table {
display: table;
}
<img class="img" src="https://via....
How do you check if a certain index exists in a table?
....indexes
WHERE name='YourIndexName' AND object_id = OBJECT_ID('Schema.YourTableName')
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Changing column names of a data frame
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Try setnames() in the data.table package. Use something like setnames(DT,"b","B") or setnames(DT,c("a","E"),c("A","F"))
– dwstu
Aug 11 '14 at 17:23
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