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Add column with constant value to pandas dataframe [duplicate]
... 1
4 0
5 NaN
6 NaN
7 NaN
8 NaN
9 NaN
Name: a, dtype: float64
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Draw a perfect circle from user's touch
...shape:
So it is not that hard to implement a circle detection mechanism based on that idea. See working demo below (Sorry, I'm using Java as the fastest way to provide this fast and a bit dirty example):
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Dimension;
import java.a...
Is it possible to make a Tree View with Angular?
...
I have created a simple re-usable tree control (directive) for AngularJS based on a Bootstrap "nav" list. I added extra indentation, icons, and animation. HTML attributes are used for configuration.
It does not use recursion.
I called it angular-bootstrap-nav-tree ( catchy name, don't you thin...
Setting property 'source' to 'org.eclipse.jst.jee.server:JSFTut' did not find a matching property
...arnings generated by the Eclipse / Tomcat integration provided by Eclipse. Based on a patch by mdfst13. (markt)
There are similar entries in the 7.0.92 and 8.5.35 changelogs.
The effect of this change is to suppress a warning when a source attribute is declared on a Context element in either s...
More elegant way of declaring multiple variables at the same time
...
Chris LutzChris Lutz
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What is the MySQL VARCHAR max size?
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As per the online docs, there is a 64K row limit and you can work out the row size by using:
row length = 1
+ (sum of column lengths)
+ (number of NULL columns + delete_flag + 7)/8
+ (number of variable-length columns)
...
Set a default parameter value for a JavaScript function
...re"
}, values || {});
// rest of code
}
// simple implementation based on $.extend() from jQuery
function merge() {
var obj, name, copy,
target = arguments[0] || {},
i = 1,
length = arguments.length;
for (; i < length; i++) {
if ((obj = arguments...
How do I send a POST request with PHP?
...
64
It's worth noting that if you decide to use an array for the headers, do NOT end the keys or values with '\r\n'. stream_context_create() w...
How to measure elapsed time in Python?
...apsed since the
first call to this function, as a floating point number, based on the
Win32 function QueryPerformanceCounter(). The resolution is typically
better than one microsecond.
Deprecated since version 3.3: The behaviour of this function depends
on the platform: use perf_counter...
REST Complex/Composite/Nested Resources [closed]
...m trying to wrap my head around the best way to address concepts in a REST based API. Flat resources that don't contain other resources are no problem. Where I'm running into trouble are the complex resources.
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