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Create an index on a huge MySQL production table without table locking
...If your using a version greater than 5.1 indices are created while the database is online. So not to worry you won't interrupt production system use."
This is ****FALSE**** (at least for MyISAM / InnoDB tables, which is what 99.999% of people out there use. Clustered Edition is different.)
Doing...
Is div inside list allowed? [duplicate]
...sed in HTML5 (this declaration is possible because HTML5 is no longer SGML-based, and therefore needs no DTD). It would be incorrect use it in other iterations of the HTML spec where a DTD is required.
– David Watson
Apr 20 '12 at 20:28
...
How to get the first word of a sentence in PHP?
...(strtok) which can be used to split a string into smaller strings (tokens) based on some separator(s). For the purposes of this thread, the first word (defined as anything before the first space character) of Test me more can be obtained by tokenizing the string on the space character.
<?php
$v...
How do I check if a type provides a parameterless constructor?
...ime (i.e. you're using Activator.CreateInstance() to instantiate an object based on a string or a constructed Type) then this won't help you. I generally use reflection as the absolute last option, because once you've gone to dynamic land you pretty much have to stay in dynamic land; it's usually di...
How do I round a decimal value to 2 decimal places (for output on a page)
...
Note: The . might be replaced with , based on the culture. You should pass along CultureInfo.InvariantCulture as the second argument to disable this.
– Duncan Luk
Feb 12 '19 at 15:04
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How to select/get drop down option in Selenium 2
...m documentation and the javadoc for the Select class.
To select an option based on the label:
Select select = new Select(driver.findElement(By.xpath("//path_to_drop_down")));
select.deselectAll();
select.selectByVisibleText("Value1");
To get the first selected value:
WebElement option = select....
How do I read a text file of about 2 GB? [duplicate]
...eny opening the file and issue an error message. Why is that? Notepad++ is based on a component (Scintilla) which is geared towards providing rich text viewing, with syntax highlighting and code folding, as opposed to bulk text services. There are necessary trade offs. Loading a 200MB file will requ...
Does PHP have threading?
...now:
The object store's hash table where data is stored, thread safe, is
based on the TsHashTable shipped with PHP, by Zend.
The object store has a read and write lock, an additional access lock is provided for the TsHashTable such that if requires ( and it does, var_dump/print_r, direct access t...
How do I create a dynamic key to be added to a JavaScript object variable [duplicate]
...push('example ' + 1);
}
Just don't forget that indexed arrays are zero-based so the first element will be jsArr[0], not jsArr[1].
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How to determine height of UICollectionView with FlowLayout
...to specify any height constraints for the collection view as it would vary based on the contents of the collection view.
Given below is the implementation:
@interface DynamicCollectionView : UICollectionView
@end
@implementation DynamicCollectionView
- (void) layoutSubviews
{
[super layout...