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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...
Find out a Git branch creator
...
We can find out based upon authorname
git for-each-ref --format='%(authorname) %09 %(if)%(HEAD)%(then)*%(else)%(refname:short)%(end) %09 %(creatordate)' refs/remotes/ --sort=authorname DESC
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In jQuery, how do I select an element by its name attribute?
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Base don how I READ the question, this was the answer I needed. :checked is what i was missing in my equation. Thanks.
– HPWD
Oct 25 '12 at 15:00
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The 3 different equals
...rmance reasons, they're wrong. So programmers are free to choose === or == based on logical reasons but not on performance reasons: there are different cases to prefer the one or the other and performance must not be taken into account at all.
– lucaferrario
Fe...
Better way to get type of a Javascript variable?
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Remember kids, manipulating JavaScript base objects can lead to compatibility and other weird issues. Try to use this sparingly in both libraries and larger projects!
– Alexander Craggs
Oct 31 '16 at 20:47
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PHP expresses two different strings to be the same [duplicate]
...en.wikipedia.org/wiki/IEEE_floating_point
Name Common name Base Digits E min E max
binary32 Single precision 2 23+1 −126 +127
binary64 Double precision 2 52+1 −1022 +1023
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How to write log to file
...efer f.Close()
log.SetOutput(f)
log.Println("This is a test log entry")
Based on the Go docs, os.Open() can't work for log.SetOutput, because it opens the file "for reading:"
func Open
func Open(name string) (file *File, err error) Open opens the named
file for reading. If successful, ...
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...
Setting background-image using jQuery CSS property
...2
{
background-image: url(/another/image/url/there.jpg);
}
// in JS
// based on value of imageUrl, determine what class to remove and what class to add.
$('myOjbect').removeClass('bg1').addClass('bg2');
share
|...
Make a float only show two decimal places
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I made a swift extension based on above answers
extension Float {
func round(decimalPlace:Int)->Float{
let format = NSString(format: "%%.%if", decimalPlace)
let string = NSString(format: format, self)
return Float(atof...