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记一次数据库表自增长（Auto Increment）故障 - 数据库(内核) - 清泛网 - ...
... the table handle in the InnoDB data dictionary contains a special counter called the auto-increment counter that is used in assigning new values for the column. This counter is stored only in main memory, not on disk.
…
A server restart also cancels the effect of the AUTO_INCREMENT = N table ...
YouTube API to fetch all videos on a channel
...arly because it only spends 2 quota points instead of 100 (that the search call would spend).
– JP de la Torre
Nov 12 '16 at 10:28
1
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Run a callback only if an attribute has changed in Rails
...omething
# ...
end
end
This utilizes the fact that the before_save callback can conditionally execute based on the return value of a method call. The status_id_changed? method comes from ActiveModel::Dirty, which allows us to check if a specific attribute has changed by simply appending _cha...
How to handle back button in activity
...
In addition to the above I personally recommend
onKeyUp():
Programatically Speaking keydown will fire when the user depresses a key initially but It will repeat while the user keeps the key depressed.*
This remains true for all development platforms.
Google development suggested that if you...
How to display a confirmation dialog when clicking an link?
...
great job.i want to call another js method which is call on the success of conformation. This is solve my problem.
– Ehsan ul haq
Sep 3 at 13:12
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Primary key/foreign Key naming convention [closed]
...regarding the naming convention for Primary and Foreign Keys. There's basically two schools of thought in our group:
13 An...
How do you beta test an iphone app?
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In year 2011, there's a new service out called "Test Flight", and it addresses this issue directly.
Apple has since bought TestFlight in 2014 and has integrated it into iTunes Connect and App Store Connect.
...
ASP.NET MVC Yes/No Radio Buttons with Strongly Bound Model MVC
... fieldset, what the radio buttons are for as a whole can not be programmatically determined.
Model
public class MyModel
{
public bool IsMarried { get; set; }
}
View
<fieldset>
<legend>Married</legend>
@Html.RadioButtonFor(e => e.IsMarried, true, new { id = "mar...
querySelector search immediate children
... not, they temporarily add an ID, then create a full selector string.
Basically you'd do:
var sel = '> someselector';
var hadId = true;
if( !elem.id ) {
hadID = false;
elem.id = 'some_unique_value';
}
sel = '#' + elem.id + sel;
var result = document.querySelectorAll( sel );
if( !hadI...
How to terminate a python subprocess launched with shell=True
...n. If your cmd happens to be a shell script wrapper for something else, do call the final binary there with exec too in order to have only one subprocess.
– Nicolinux
Aug 4 '16 at 17:51
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