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MySQL: Fastest way to count number of rows
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12 Answers
12
Active
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Why doesn't Java allow generic subclasses of Throwable?
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155
As mark said, the types are not reifiable, which is a problem in the following case:
try {
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Update multiple rows in same query using PostgreSQL
...izable:
update test as t set
column_a = c.column_a
from (values
('123', 1),
('345', 2)
) as c(column_b, column_a)
where c.column_b = t.column_b;
You can add as many columns as you like:
update test as t set
column_a = c.column_a,
column_c = c.column_c
from (values
('12...
Which terminal command to get just IP address and nothing else?
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181
You can write a script that only return the IP like:
/sbin/ifconfig eth0 | grep 'inet addr' |...
How to read/write a boolean when implementing the Parcelable interface?
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12 Answers
12
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How to convert a string of numbers to an array of numbers?
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14 Answers
14
Active
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What is the difference between LL and LR parsing?
...back to some nonterminal by reversing a production.
As an example, an LR(1) parser (with one token of lookahead) might parse that same string as follows:
Workspace Input Action
---------------------------------------------------------
int + int + int Shift
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What are the complexity guarantees of the standard containers?
...; Make an empty vector. O(1)
vector<T> v(n); Make a vector with N elements. O(n)
vector<T> v(n, value); Make a vector with N elements, initialized to value. O(n)
vector<T> v(begin, end); ...
How to parse a CSV file using PHP [duplicate]
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201
Just use the function for parsing a CSV file
http://php.net/manual/en/function.fgetcsv.php
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