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Android - Back button in the title bar
In many apps (Calendar, Drive, Play Store) when you tap a button and enter a new activity, the icon in the title bar turns into a back button, but for the app I am making, it doesn't do that. How do I make that icon take you back to the previous screen?
...
Set Colorbar Range in matplotlib
... ( (0.0, 0.0, 0.0), (0.02, .45, .45), (1., .97, .97)),
'blue' : ( (0.0, 1.0, 1.0), (0.02, .75, .75), (1., 0.45, 0.45))
}
cm = m.colors.LinearSegmentedColormap('my_colormap', cdict, 1024)
x = np.arange(0, 10, .1)
y = np.arange(0, 10, .1)
X, Y = np.meshgrid(x,y)
data = 2*( np.sin(X) + np.sin(3*Y...
How to customize a requirements.txt for multiple environments?
...is:
common.txt:
# Contains requirements common to all environments
req1==1.0
req2==1.0
req3==1.0
...
dev.txt:
# Specifies only dev-specific requirements
# But imports the common ones too
-r common.txt
dev_req==1.0
...
prod.txt:
# Same for prod...
-r common.txt
prod_req==1.0
...
Outside of ...
推荐引擎easyrec半天学习分享 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...一段调用代码：
$(function(){
$.getJSON(
"/easyrec-web/api/1.0/json/otherusersalsoviewed?apikey=32b0c25e6bc63bf1627dc7e877f81b3d&tenantid=EASYREC_DEMO&itemid=43",
function(transport) {
var json = eval(transport);
var items = json.recommendeditems.item;
if( "undefined" == t...
What are the effects of exceptions on performance in Java?
...performances are not a concern...
– Jean-Baptiste Yunès
Aug 4 '17 at 15:45
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show 4 more comments
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Difference between JSP EL, JSF EL and Unified EL [closed]
...
Jun 2002: JSTL 1.0 was introduced with EL for first time. It were those ${} things which works in JSTL tags only. It is designed to call Javabean get methods.
Nov 2003: JSP 2.0 was introduced and EL was moved from JSTL 1.0 to JSP 2.0 in jav...
Getting random numbers in Java [duplicate]
...dom() * 50 + 1);
This will give you value from 1 to 50 in case of int
or 1.0 (inclusive) to 50.0 (exclusive) in case of double
Why?
random() method returns a random
number between 0.0 and 0.9..., you
multiply it by 50, so upper limit
becomes 0.0 to 49.999... when you add 1, it becom...
Maximum call stack size exceeded error
...lmost got deleted as spam (check history)
– Jean-François Fabre♦
May 5 '19 at 9:37
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show 1 more comment
...
Send Email Intent
...p; a sample body" you will get just "I am"
– Emre Koç
Oct 19 '15 at 8:31
4
ShareCompat results ...
Fastest way to iterate over all the chars in a String
...4 field1 1.6 1.4 40.0 45.6 1.2 1.9 2.1 1.0 1.2
2,048 field1 1.6 1.3 40.0 36.2 1.2 1.8 1.7 0.9 1.1
4,096 field1 1.6 1.3 39.7 32.6 1.2 1.8 1.7 0.9 1.0
8,192 field1 1.6 1....