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Using MemoryStore in production
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29
MemoryStore is just for (rapid) development mode, because if your app restarts (process dies) y...
What are the precise rules for when you can omit parenthesis, dots, braces, = (functions), etc.?
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edited Aug 29 '15 at 16:09
Mifeet
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Is it possible to set a number to NaN or infinity?
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279
Cast from string using float():
>>> float('NaN')
nan
>>> float('Inf')
inf
&...
How to find reason of failed Build without any error or warning
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2
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Detect application heap size in Android
...lls you how many total bytes of heap your app is allowed to use.
For item 2 above: getMemoryClass()
which can be invoked as follows:
ActivityManager am = (ActivityManager) getSystemService(ACTIVITY_SERVICE);
int memoryClass = am.getMemoryClass();
Log.v("onCreate", "memoryClass:" + Integer.toStrin...
Python: Is it bad form to raise exceptions within __init__?
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162
Raising exceptions within __init__() is absolutely fine. There's no other good way to indicate a...
pandas read_csv and filter columns with usecols
...pandas as pd
from StringIO import StringIO
csv = r"""dummy,date,loc,x
bar,20090101,a,1
bar,20090102,a,3
bar,20090103,a,5
bar,20090101,b,1
bar,20090102,b,3
bar,20090103,b,5"""
df = pd.read_csv(StringIO(csv),
header=0,
index_col=["date", "loc"],
usecols=["date", "loc", "x"],...
Convert Dictionary to semicolon separated string in c#
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294
using System.Linq;
string s = string.Join(";", myDict.Select(x => x.Key + "=" + x.Value).T...
Spring @Transactional - isolation, propagation
...d option.
Example of when a dirty read can occur:
thread 1 thread 2
| |
write(x) |
| |
| read(x)
| |
rollback |
v v
value (x) is now dirty (incorrect)
So a sane default (if such can be cla...
VSS使用指南 - 开源 & Github - 清泛网 - 专注IT技能提升
...vwapdemoProject/…
$/公司产品/WAP产品/thirdparty/jdbc/oracle/class12.jare:devthirdpartyjdbcoracleclass12.jar
$/公司产品/WAP产品/ptree/common/lib/… e:/dev/demoProject/shared/common/lib/…
$/公司产品/WAP产品/代码/common/build/build.sh e:/dev/demoProject/build/build.sh
…...