大约有 40,000 项符合查询结果（耗时：0.0677秒） [XML]
ALTER TABLE without locking the table?
...n doing an ALTER TABLE statement in MySQL, the whole table is read-locked (allowing concurrent reads, but prohibiting concurrent writes) for the duration of the statement. If it's a big table, INSERT or UPDATE statements could be blocked for a looooong time. Is there a way to do a "hot alter", like ...
Fragments onResume from back stack
...ble to the user) after poping out of the backstack, I'd like some kind of callback to be activated within the fragment (to perform certain changes on a shared UI resource, for instance).
...
Run PostgreSQL queries from the command line
... assuming that you have not finished entering your query. This can lead to all kinds of confusion. For example, if you re-enter the same query you will have most likely create a syntax error.
As an experiment, try typing any garble you want at the psql prompt then hit enter. psql will silently prov...
Get controller and action name from within controller?
...outeValues["id"];
else if (HttpContext.Current.Request.QueryString.AllKeys.Contains("id"))
return HttpContext.Current.Request.QueryString["id"];
return string.Empty;
}
public static string Controller(this HtmlHelper htmlHelper)
{
var routeValues = Ht...
How to programmatically set drawableLeft on Android button?
I'm dynamically creating buttons. I styled them using XML first, and I'm trying to take the XML below and make it programattic.
...
How to make an HTTP POST web request
... it is great to have such short piece of code.
– user_v
Sep 11 '13 at 6:15
3
Tim - If you right c...
How to do a LIKE query in Arel and Rails?
...000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4.61182 48.1414 4.61182C47.4335 4.61182 46.7256 4.91628 46.0943 5.50789C45.7307 4.9328 4...
sort object properties and JSON.stringify
...Obj, Object.keys(flattenObject(sortMyObj)).sort());
To do it programmatically with something you can tweak yourself, you need to push the object property names into an array, then sort the array alphabetically and iterate through that array (which will be in the right order) and select each value ...
Declaring a custom android UI element using XML
...
The Android Developer Guide has a section called Building Custom Components. Unfortunately, the discussion of XML attributes only covers declaring the control inside the layout file and not actually handling the values inside the class initialisation. The steps are as...
How to do a batch insert in MySQL
...000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4.61182 48.1414 4.61182C47.4335 4.61182 46.7256 4.91628 46.0943 5.50789C45.7307 4.9328 4...