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C++11 rvalues and move semantics confusion (return statement)
...}
std::vector vec;
for(int x=0; x<10; ++x)
{
MyExpensiveType temp(1.0, 3.0);
temp.initSomeOtherFields(malloc(5000));
// old way, passed via const reference, expensive copy
vec.push_back(temp);
// new way, passed via rvalue reference, cheap move
// just don't use temp a...
How do browsers pause/change Javascript when tab or window is not active?
...r interval for background tabs.
const double kBackgroundTabTimerInterval = 1.0;
https://codereview.chromium.org/6546021/patch/1001/2001
Firefox
Similar to Chrome, Firefox limits the minimum interval of setInterval to around 1000ms when the tab (not the window) is inactive. However, requestAnimati...
How to securely store access token and secret in Android?
... 16
targetSdkVersion 26
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
// Create BuildConfig variables
buildConfigField "String", "ACCESS_TOKEN", keystoreProperties["ACCESS_TOKEN"]
bu...
Regular expression for floating point numbers
... most languages consider valid numbers (integer and floats):
'5' / '-5'
'1.0' / '1.' / '.1' / '-1.' / '-.1'
'0.45326e+04', '666999e-05', '0.2e-3', '-33.e-1'
Notes:
preceding sign of number ('-' or '+') is optional
'-1.' and '-.1' are valid but '.' and '-.' are invalid
'.1e3' is valid, but '.e3...
XmlSerializer: remove unnecessary xsi and xsd namespaces
... }
}
}
}
To get the following XML:
<?xml version="1.0"?>
<Person xmlns="http://www.something.org/schema">
<FirstName>Donald</FirstName>
<LastName>Duck</LastName>
</Person>
If you don't want the namespace, just set DEFAULT_NAMESPAC...
Why doesn't RecyclerView have onItemClickListener()?
... / Java
Create a file values/ids.xml and put this in it:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<item name="item_click_support" type="id" />
</resources>
then add the code below to your source
Kotlin
Usage:
recyclerView.onItemClick { recyclerView, position, v...
What's the difference between --general-numeric-sort and --numeric-sort options in gnu sort
...ws
floating point numbers to be specified
in scientific notation, like 1.0e-34
and 10e100. The LC_NUMERIC locale
determines the decimal-point
character. Do not report overflow,
underflow, or conversion errors. Use
the following collating sequence:
Lines that do not start with number...
How to read a .xlsx file using the pandas Library in iPython?
... for sheet_name in xl_file.sheet_names}
Update: In pandas version 0.21.0+ you will get this behavior more cleanly by passing sheet_name=None to read_excel:
dfs = pd.read_excel(file_name, sheet_name=None)
In 0.20 and prior, this was sheetname rather than sheet_name (this is now deprecated ...
Rolling median algorithm in C
...alue incrementally:
quantile += eta * (sgn(sample - quantile) + 2.0 * p - 1.0)
The value p should be within [0, 1]. This essentially shifts the sgn() function's symmetrical output {-1, 0, 1} to lean toward one side, partitioning the data samples into two unequally-sized bins (fractions p and 1 - ...
Is gcc std::unordered_map implementation slow? If so - why?
... + finish.tms_stime - start.tms_stime)
/ (1.0 * ticks_per_second))
<< " " << m << std::endl;
}
I used a SIZE of 10000000, and had to change things a bit for my version of boost. Also note, I pre-sized the hash table to match SIZE/DEP...