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Aren't Python strings immutable? Then why does a + “ ” + b work?
...u changed the variable a to point at a new string "Dog eats treats". You didn't actually mutate the string "Dog". Strings are immutable, variables can point at whatever they want.
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How do I tell if a regular file does not exist in Bash?
...tmp/foo.txt ] && echo "File not found!"
– DavidWinterbottom
Sep 29 '10 at 12:09
38
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Difference between array_map, array_walk and array_filter
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Changing Values:
array_map cannot change the values inside input array(s) while array_walk can; in particular, array_map never changes its arguments.
Array Keys Access:
array_map cannot operate with the array keys, array_walk can.
Return Value:
array_map returns a new array...
How to iterate over array of objects in Handlebars?
...
You can pass this to each block. See here: http://jsfiddle.net/yR7TZ/1/
{{#each this}}
<div class="row"></div>
{{/each}}
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ASP.NET MVC 5 - Identity. How to get current ApplicationUser
...PI is consistent. For example the users table is now called AspNetUsers in Identity Framework, and the names of several primary key fields kept changing, so the code in several answers will no longer work as-is.
Another problem is that the underlying OWIN access to the database will use a separate ...
How to show Page Loading div until the page has finished loading?
...Query needed):
First, right after the <body> tag add this:
<div id="loading">
<img id="loading-image" src="images/ajax-loader.gif" alt="Loading..." />
</div>
Then add the style class for the div and image to your CSS:
#loading {
width: 100%;
height: 100%;
top: 0;...
Scroll to bottom of Div on page load (jQuery)
...y'll work, unless you have more than double the div's height in content inside of it.
Here is the correct version:
$('#div1').scrollTop($('#div1')[0].scrollHeight);
or jQuery 1.6+ version:
var d = $('#div1');
d.scrollTop(d.prop("scrollHeight"));
Or animated:
$("#div1").animate({ scrollTop: $...
Change Schema Name Of Table In SQL
...a = 'exe'
while exists(select * from sys.tables where schema_name(schema_id) = @oldschema)
begin
select @table = name from sys.tables
where object_id in(select min(object_id) from sys.tables where schema_name(schema_id) = @oldschema)
set @sql = 'alter schema ' + @newschema +...
How can I change an element's class with JavaScript?
...iques for changing classes
Modern browsers have added classList which provides methods to make it easier to manipulate classes without needing a library:
document.getElementById("MyElement").classList.add('MyClass');
document.getElementById("MyElement").classList.remove('MyClass');
if ( document...
How to check if a column exists in a SQL Server table?
...ROM sys.columns
WHERE Name = N'columnName'
AND Object_ID = Object_ID(N'schemaName.tableName'))
BEGIN
-- Column Exists
END
Martin Smith's version is shorter:
IF COL_LENGTH('schemaName.tableName', 'columnName') IS NOT NULL
BEGIN
-- Column Exists
END
...