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How to check if a value exists in an array in Ruby
...rnally, you need to use a different data structure, such as a perfect hash table with fixed sized keys. Given that there's no way to test for membership in an array without looping internally, I interpreted the question to mean "without having to write the loop explicitly myself"
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Is there a CSS selector for elements containing certain text?
I am looking for a CSS selector for the following table:
18 Answers
18
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How can I pretty-print JSON using node.js?
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what about this?
console.table(object)
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When would you use delegates in C#? [closed]
... is extremely handy (although the example is a little contrived).
string sTableName = "test";
string sQuery = "SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME='" + sTableName + "'";
DataProvider.UseReader( sQuery,
delegate( System.Data.IDataReader reader )
{
Con...
What is eager loading?
... context of a ORM (Object Relational Mapper), where you map an object to a table in a relational database.
– Loki
Aug 19 '09 at 11:44
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What does the ??!??! operator do in C?
...d-translated to ||, i.e the logical OR, by the preprocessor.
The following table containing every trigraph should help disambiguate alternate trigraph combinations:
Trigraph Replaces
??( [
??) ]
??< {
??> }
??/ \
??' ^
??= #
??! |
??- ...
For loop for HTMLCollection elements
...erable performance or memory drawbacks. For example if I need to iterate a table row's cells I use a [...row.cells].forEach instead of doing a row.querySelectorAll('td')
– Mojimi
Oct 15 '19 at 13:18
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Validation failed for one or more entities. See 'EntityValidationErrors' property for more details [
... column(s) is/ are causing the problem as this error usually occurs when a table-constraint is violated..
Large image
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Check if Python Package is installed
...s:
import subprocess
import sys
reqs = subprocess.check_output([sys.executable, '-m', 'pip', 'freeze'])
installed_packages = [r.decode().split('==')[0] for r in reqs.split()]
The result:
print(installed_packages)
[
"Django",
"six",
"requests",
]
Check if requests is installed:
i...
INSERT INTO … SELECT FROM … ON DUPLICATE KEY UPDATE
...ith MySQL 5.6.6, an INSERT ... ON DUPLICATE KEY UPDATE statement against a table having more than one unique or primary key is also marked as unsafe.`
– Abdul Muneer
Aug 10 '15 at 5:53
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