大约有 30,000 项符合查询结果（耗时：0.0488秒） [XML]
Filtering Pandas DataFrames on dates
...
If date column is the index, then use .loc for label based indexing or .iloc for positional indexing.
For example:
df.loc['2014-01-01':'2014-02-01']
See details here http://pandas.pydata.org/pandas-docs/stable/dsintro.html#indexing-selection
If the column is not the index ...
Can we pass parameters to a view in SQL?
...XEC sp_set_session_context 'my_num', 2;
SELECT * FROM my_view;
DBFiddle Demo
The same is applicable for Oracle (of course syntax for context function is different).
share
|
improve this answer
...
Mapping two integers to one, in a unique and deterministic way
... * (A + B + 1) / 2 + A;
(-32768, -32768) => 8589803520 which is Int64. 64 bit output for 16 bit inputs may be so unpardonable!!
Szudzik's function:
A = a >= 0 ? 2 * a : -2 * a - 1;
B = b >= 0 ? 2 * b : -2 * b - 1;
A >= B ? A * A + A + B : A + B * B;
(-32768, -32768) => 4...
Positions fixed doesn't work when using -webkit-transform
...ansform: translate(100%, 0);
transform: translate(-100%, 0);
}
Demo:
http://jsfiddle.net/ZWcD9/
share
|
improve this answer
|
follow
|
...
What are the downsides to using Dependency Injection? [closed]
...with. For example, if screen resolutions get really huge, maybe we'll need 64-bit co-ordinate values - and another version of CreateWindowEx. And yes, there's already an older version still hanging around, that presumably gets mapped to the newer version behind the scenes...
http://msdn.microsoft.c...
How to get unique device hardware id in Android? [duplicate]
...droid device ID?
More specifically, Settings.Secure.ANDROID_ID. This is a 64-bit quantity that is generated and stored when the device first boots. It is reset when the device is wiped.
ANDROID_ID seems a good choice for a unique device identifier. There are downsides: First, it is not 100% reliab...
Bootstrap 3 jquery event for active tab change
...e) {
console.log('show - before the new tab has been shown');
});
demo
share
|
improve this answer
|
follow
|
...
Import / Export database with SQL Server Server Management Studio
...
BrandonBrandon
64.2k2929 gold badges186186 silver badges217217 bronze badges
...
Getting a list of files in a directory with a glob
...s this should work in both Cocoa and Cocoa-Touch applications.
Here's the demo code I wrote up in about 10 minutes. I changed the < and > to " because they weren't showing up inside the pre block, but it still works with the quotes. Maybe somebody who knows more about formatting code here o...
how to change an element type using jquery
.../ replace element
element.parentNode.replaceChild(new_element, element);
DEMO
Not sure how cross-browser compatible this is though.
A variation could be:
for(var i = 0, len = old_attributes.length; i < len; i++) {
new_element.setAttribute(old_attributes[i].name, old_attributes[i].value);...