To print the value of a pointer to an object (as opposed to a function pointer) use the p conversion specifier. It is defined to print void-pointers only, so to print out the value of a non void-pointer it needs to be explicitly converted ("casted*") to void*.
#include <stdlib.h> /*...
PHP provides support for the HTTP PUT method used by some clients to store files on a server. PUT requests are much simpler than a file upload using POST requests and they look something like this:
PUT /path/filename.html HTTP/1.1
Into your PHP code you would then do something like this:
<?p...
Python programs can read from unix pipelines. Here is a simple example how to read from stdin:
import sys
for line in sys.stdin:
print(line)
Be aware that sys.stdin is a stream. It means that the for-loop will only terminate when the stream has ended.
You can now pipe the output of anot...
Sometimes we need to fetch and print the value of a TensorFlow variable to guarantee our program is correct.
For example, if we have the following program:
import tensorflow as tf
import numpy as np
a = tf.Variable(tf.random_normal([2,3])) # declare a tensorflow variable
b = tf.random_normal([2...
Consider the following three equations:
x0 + 2 * x1 + x2 = 4
x1 + x2 = 3
x0 + x2 = 5
We can express this system as a matrix equation A * x = b with:
A = np.array([[1, 2, 1],
[0, 1, 1],
[1, 0, 1]])
b = np.array([4, 3, 5])
Then, use np.linalg....
Create a select list that can be used to choose a single or multiple items from a list of values.
library(shiny)
ui <- fluidPage(
selectInput("id_selectInput",
label = HTML('<B><FONT size="3">What is your favorite color ?</FONT></B&g...
When dealing with an unbalanced design and/or non-orthogonal contrasts, Type II or Type III Sum of Squares are necessary. The Anova() function from the car package implements these. Type II Sum of Squares assumes no interaction between main effects. If interactions are assumed, Type III Sum of Squar...
The current frame rate (in FPS, Frames Per Second) and total number of SKNodes in the scene (nodeCount, each sprite is an SKNode but other objects in the scene are also SKNodes) can be shown in the bottom right hand corner of the view.
These can be useful when turned on (set to true) for debugging ...
An SKView does not need to fill the whole screen and can share space with other UI controls. You can even have more than one SKView displayed at once if you wish.
To create a smaller SKView amongst other controls with Interface Builder, first create a normal ViewController, then drag and drop a new...
When a function returns an object (as opposed to using one that's passed in by the caller), be careful an exception doesn't cause the object to leak.
function MakeStrings: TStrings;
begin
// Create a new object before entering the try-block.
Result := TStringList.Create;
try
// Execu...
A try-finally block may be nested inside a try-except block.
try
AcquireResources;
try
UseResource;
finally
ReleaseResource;
end;
except
on E: EResourceUsageError do begin
HandleResourceErrors;
end;
end;
If an exception occurs inside UseResource, then execution...
A try-except block may be nested inside a try-finally block.
AcquireResource;
try
UseResource1;
try
UseResource2;
except
on E: EResourceUsageError do begin
HandleResourceErrors;
end;
end;
UseResource3;
finally
ReleaseResource;
end;
If an EResourceUsageE...
In Tcl itself, a string consisting of a single word does not need to be quoted. In the language of expression strings that expr evaluates, all operands must have an identifiable type.
Numeric operands are written without any decoration:
expr {455682 / 1.96e4}
So are boolean constants:
expr {tr...
Navigation controller can be embed in each tabs using storyboard it self. It can be like in the screenshot added.
To add a Navigation Controller to a View Controller connecting from Tab Bar Controller, here are the flow
Select the view controller for which we need to add navigation controller. H...
Consider following html code
<ul>
<li id=“one” class=“main”>Item 1</li>
<li id=“two” class=“main”>Item 2</li>
<li id=“three” class=“main”>Item 3</li>
<li id=“four”>Item 4</li>
</ul>
Following dom tree will be constructed ba...
In order to print the value of a variable such as,
set tempVar "This is a string."
The argument in the puts statement is preceded by a $ sign, which tells Tcl to use the value of the variable.
% set tempVar "This is a string."
This is a string.
% puts $tempVar
This is a s...
The tr method returns a copy of a string where the characters of the first argument are replaced by the characters of the second argument.
"string".tr('r', 'l') # => "stling"
To replace only the first occurrence of a pattern with with another expression use the sub method
...
We can use org.apache.commons.lang3.RandomUtils to generate random numbers using a single line.
int x = RandomUtils.nextInt(1, 1000);
The method nextInt(int startInclusive, int endExclusive) takes a range.
Apart from int, we can generate random long, double, float and bytes using this class.
R...
What happens if I don't set base_url ?
You will not get any Impotency error to set this and proceed. You can continue without setting, but you should know about HTTP header injection
If I did't set it what will show up?
You will get http://[::1]/ instead of your actual URL.
What does this m...
Any project that targets netstandard1.X can be packed into a NuGet package by running:
dotnet pack
The resulting package can be uploaded to NuGet, MyGet, or hosted in a local package source.
