Print variable types: Difference between revisions
Jump to navigation
Jump to search
No edit summary |
|||
| (6 intermediate revisions by the same user not shown) | |||
| Line 1: | Line 1: | ||
Print type of the variable | Print the type of the variable or just print the variable | ||
== Print the type of the variable == | |||
=== PHP === | |||
PHP gettype()<ref>[http://php.net/manual/en/function.gettype.php PHP: gettype - Manual]</ref>: | |||
<pre> | <pre> | ||
# define the variable | # define the variable | ||
| Line 9: | Line 11: | ||
echo "type of variable: " . gettype($var); | echo "type of variable: " . gettype($var); | ||
</pre> | </pre> | ||
=== Python === | |||
Python type():<ref>[https://docs.python.org/3.6/library/functions.html?highlight=type#type type]</ref><ref>[https://waoewaoe.wordpress.com/2009/05/18/type-cast-variable-to-string-in-python/ Type cast variable to String in python | Ploy's Blog | A Blog About Techinical Stuff]</ref> or {{kbd | key=<nowiki>print(type(var))</nowiki>}} | |||
<pre> | <pre> | ||
# define the variable | # define the variable | ||
| Line 19: | Line 23: | ||
print("type of variable: " + str(type(var))) # python v. 3 cast type to string | print("type of variable: " + str(type(var))) # python v. 3 cast type to string | ||
</pre> | </pre> | ||
=== Javascript === | |||
Javascript typeof()<ref>[https://www.w3resource.com/javascript/operators/typeof.php JavaScript : typeof operator - w3resource]</ref> | |||
<pre> | <pre> | ||
# define the variable | # define the variable | ||
| Line 28: | Line 34: | ||
console.log("type of variable:: " + typeof a); | console.log("type of variable:: " + typeof a); | ||
</pre> | </pre> | ||
== | === R === | ||
R: [https://stat.ethz.ch/R-manual/R-devel/library/base/html/typeof.html typeof()] | |||
== Print the variable == | |||
=== PHP === | |||
* [http://php.net/manual/en/function.print-r.php PHP: print_r - Manual] or | |||
* [http://php.net/manual/en/function.var-dump.php PHP: var_dump - Manual] | |||
<pre> | |||
# define the variable | |||
$var = 3.14159; | |||
echo print_r($var, true) . PHP_EOL; | |||
var_dump($var); | |||
</pre> | |||
=== Python === | |||
* [https://www.python-course.eu/python3_print.php Python3 Tutorial: Output with Print] | |||
* [https://stackoverflow.com/questions/1987694/how-to-print-the-full-numpy-array python - How to print the full NumPy array? - Stack Overflow] | |||
<pre> | |||
# define the variable | |||
var = 3.14159 | |||
print(var)) # python v. 3 | |||
</pre> | |||
=== JavaScript === | |||
Using the [https://www.w3schools.com/jsref/met_console_log.asp HTML DOM console.log() Method]. | |||
<pre> | |||
var a = 3.14159 | |||
console.log(a); | |||
# print: 3.14159 | |||
</pre> | |||
== Iterate over elements of an array or list == | |||
=== PHP === | |||
PHP: Using [http://php.net/manual/en/control-structures.foreach.php foreach] to iterate over elements of an array or public properties of an object<ref>[http://www.zentut.com/php-tutorial/php-foreach/ Using PHP foreach Loop to Iterate over Elements of an Array]</ref>. | |||
Code: | |||
<pre> | |||
# type: array | |||
$animals = ["bird", "dog", "bird"]; | |||
foreach ($animals as $index => $animal) { | |||
print "$index $animal" . PHP_EOL; | |||
} | |||
</pre> | |||
Result: | |||
<pre> | |||
0 bird | |||
1 dog | |||
2 bird | |||
</pre> | |||
=== Python === | |||
Python: Using [https://www.w3schools.com/python/python_for_loops.asp for loops] and [http://book.pythontips.com/en/latest/enumerate.html enumerate] function. | |||
Code: | |||
<pre> | |||
# type: list | |||
animals = ['cat', 'dog', 'bird'] | |||
for index, animal in enumerate(animals): | |||
print (index, animal) | |||
</pre> | |||
Result: | |||
<pre> | |||
0 bird | |||
1 dog | |||
2 bird | |||
</pre> | |||
== References == | |||
<references/> | <references/> | ||
== Related articles == | |||
* [https://en.wikipedia.org/wiki/Code_refactoring Code refactoring - Wikipedia] | |||
{{Template:Troubleshooting}} | {{Template:Troubleshooting}} | ||
[[Category:Programming]] | [[Category:Programming]] | ||
Latest revision as of 14:05, 28 October 2018
Print the type of the variable or just print the variable
Print the type of the variable[edit]
PHP[edit]
PHP gettype()[1]:
# define the variable $var = 3.14159; # print type of the variable echo "type of variable: " . gettype($var);
Python[edit]
Python type():[2][3] or print(type(var))
# define the variable
var = 3.14159
# print type of the variable
type(var) # return <class 'type'>
print(type(var))
print("type of variable: " + str(type(var))) # python v. 3 cast type to string
Javascript[edit]
Javascript typeof()[4]
# define the variable
var a = 3.14159;
# print type of the variable
typeof a;
console.log("type of variable:: " + typeof a);
R[edit]
R: typeof()
Print the variable[edit]
PHP[edit]
# define the variable $var = 3.14159; echo print_r($var, true) . PHP_EOL; var_dump($var);
Python[edit]
# define the variable var = 3.14159 print(var)) # python v. 3
JavaScript[edit]
Using the HTML DOM console.log() Method.
var a = 3.14159 console.log(a); # print: 3.14159
Iterate over elements of an array or list[edit]
PHP[edit]
PHP: Using foreach to iterate over elements of an array or public properties of an object[5].
Code:
# type: array
$animals = ["bird", "dog", "bird"];
foreach ($animals as $index => $animal) {
print "$index $animal" . PHP_EOL;
}
Result:
0 bird 1 dog 2 bird
Python[edit]
Python: Using for loops and enumerate function. Code:
# type: list
animals = ['cat', 'dog', 'bird']
for index, animal in enumerate(animals):
print (index, animal)
Result:
0 bird 1 dog 2 bird
References[edit]
Related articles[edit]
Troubleshooting of ...
- PHP, cUrl, Python, selenium, HTTP status code errors
- Database: SQL syntax debug, MySQL errors, MySQLTuner errors or PostgreSQL errors
- HTML/Javascript: Troubleshooting of javascript, XPath
- Software: Mediawiki, Docker, FTP problems, online conference software
- Test connectivity for the web service, Web Ping, Network problem, Web user behavior, Web scrape troubleshooting
Template