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SQLite select where empty?
...e faster in some situation, as comparing numbers is simpler than comparing strings. If the performance for that is a concern, you should of course check what it does.
– Guffa
Apr 16 '12 at 11:16
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How to convert `git:` urls to `http:` urls
...written to start, instead, with <base>. When more than one insteadOf strings match a given URL, the longest match is used.
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Difference between Document-based and Key/Value-based databases?
...t. JSON also supports arrays and understands different data types, such as strings, numbers and boolean values.
Querying
I believe column-family stores can only be queried by key, or by writing map-reduce functions. You cannot query the values like you would in an SQL database. If your application...
How to break out or exit a method in Java?
....g
import java.util.Scanner;
class demo
{
public static void main(String args[])
{
outerLoop://Label
for(int i=1;i<=10;i++)
{
for(int j=1;j<=i;j++)
{
for(int k=1;k<=j;k++)
...
jQuery - selecting elements from inside a element
...provide a second argument to the jQuery selector. It can be any css object string just like you would pass for direct selecting or a jQuery element.
eg.
$("span",".cont1").css("background", '#F00');
The above line will select all spans within the container having the class named cont1.
DEMO
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Is there StartsWith or Contains in t sql with variables?
...'prefix%' will be very fast when colName is indexed, but colName LIKE '%substring%' or colName LIKE '%suffix' will be slow because SQL Server does not create suffix-trees when indexing text. Similarly using LEFT with a column will also be slow because those queries are not SARGable. SARGability is i...
How to check if a model has a certain column/attribute?
... a class
Use Class.column_names.include? attr_name where attr_name is the string name of your attribute.
In this case: Number.column_names.include? 'one'
For an instance
Use record.has_attribute?(:attr_name) or record.has_attribute?('attr_name') (Rails 3.2+) or record.attributes.has_key? attr_na...
How do I get the type name of a generic type argument?
...g, functioning program:
using System;
class Program
{
public static string MyMethod<T>()
{
return typeof(T).FullName;
}
static void Main(string[] args)
{
Console.WriteLine(MyMethod<int>());
Console.ReadKey();
}
}
Running the above p...
How can I assign the output of a function to a variable using bash?
...local nl=$'\x0a'; # that's just \n
echo "output${nl}${nl}" # 2 in the string + 1 by echo
}
# append a character to the total output.
# and strip it with %% parameter expansion.
VAR=$(scan2; echo "x"); VAR="${VAR%%x}"
echo "${VAR}---"
prints (3 newlines kept):
output
---
Use an output p...
How to download/checkout a project from Google Code in Windows?
.../trunk/ projectname-read-only
Note the space between the URL and the last string is intentional, the last string is the folder name into which the source will be downloaded.
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