);G_hash_table_insert (hash, "Virginia", "Richmond ");G_hash_table_insert (hash, "Texas", "Austin ");G_hash_table_insert (hash, "Ohio", "Columbus ");G_printf ("There are % d keys in the hash/n", g_hash_table_size (hash ));G_printf ("The capital of Texas is % s/n", g_hash_table_lookup (hash, "Texas "));Gboolean found = g_hash_table_remove (hash, "Virginia ");G_printf ("The value 'virginia 'was % sfound and removed/n", found? "": "Not ");G_hash_table_d
pointer position in input_array.# Example4
Copy codeThe Code is as follows: $ Capitals = array ("Ohio" => "Columbus", "Towa" => "Des Moines", "Arizona" => "Phoenix ");
Echo "While ($ key = key ($ capitals )){
Echo $ key. "Next ($ capitals );
// Each key () call does not push the pointer. Use the next () function.
}
?>
Display result:Can you name the capitals of these states?OhioTowaArizonaReset ()Mixed reset (array input_array)The reset () function i
returns the key element at the current pointer position in input_array.
# Example4Copy codeThe Code is as follows:$ Capitals = array ("Ohio" => "Columbus", "Towa" => "Des Moines", "Arizona" => "Phoenix ");Echo "While ($ key = key ($ capitals )){Echo $ key. "Next ($ capitals );// Each key () call does not push the pointer. Use the next () function.}?>
Display result:
Can you name the capitals of these states?OhioTowaArizona
Reset ()
Mixed reset (array
element at the current pointer position in Input_array.
#example4Copy the Code code as follows:$capitals = Array ("Ohio" = "Columbus", "towa" = "Des Moines", "Arizona" and "Phoenix");echo "
Can you name the capitals of these states?";
while ($key = key ($capitals)) {
echo $key. "
";
Next ($capitals);
Each key () call does not push the pointer. To do this, use the next () function
}
?>
Show Results:
Can you name the capitals of these states?OhioTowaA
array contains four keys, key 0 and key contain the key names, and key 1 and value contain the corresponding data. Returns False if each () is executed before the pointer is at the end of the array.
PHP $capitals Array ("Ohio" = "Columbus", "towa" = "Des Moines", "Arizona" and "Phoenix"); $s 1 each ($capitals); Print_r ($s 1);? >Show Results:Array ([1] = Columbus [value] = Columbus [0] = = Ohio [key
the Operation function of array pointer
Key ()
Mixed key (array Input_array)
The key () function returns the Input_array element at the current pointer position.
#example4
Copy Code code as follows:
$capitals = Array ("Ohio" => "Columbus", "Towa" => "Des Moines", "Arizona" => "Phoenix");
echo "while ($key = key ($capitals)) {
echo $key. " Next ($capitals);
Each key () call does not push the pointer. To do this, use the next (
. If yes, true is returned. if not, false is returned. it is a basic and practical function!Adding and removing array elementsArray_push ()IntArray_push(Array target_array, mixed var [, mixed...])Add one or more cells to the array from the end! Returns the total number of cells in the new array!Example:Copy the PHP content to the clipboard. PHP code:
$states =array(‘Ohio’, ‘New York’);array_push($states, ‘California’,‘Texas’);//output: array((‘
Zip code. This is the postal code of the United States. Currently, only the postal code in the United States is State-owned, and other industries are not State-owned. the reason for providing us zip code today is that you need to provide this zip code when registering a foreign account, because American services are generally oriented to the United States by default, only the United States is supported. the following provides a list of zip codes in the United States. city State 12201 Albany NewY
These industries include aerospace, manufacturing, and chemical market industries. this includes des guidance on regulations, how to inspect the vehicle and of course how to operate it properly. tags: Ohio Automotive Refinishing detection, QCS, unloading dock ramp gauging systemsusing the online thickness measurement device with the help of any of 3 rarely used measuring method: tysoncross0602 | Jul 16th 2014-a lot of industries rely on Accurate Measu
California-Santa Barbara20. Univ of California-San Diego21. Texas A M University22. Ohio State University23. r
Ensseler Polytechnic Inst24. Polytechnic University25. University of Washington26. Rice University27. Virginia Polytech inst State University28. Pennsylvania State University29. U of mascript usetts at Amherst30. Yale University31 University of Florida32. North Carolina Lina State University33. University of California-Davis34. Johns Hopk
fact, this function can only be regarded as a language structure. You have used it when creating arrays. If you have never used it, You can only say it, bro, I'm speechless!List ()This function is just a language structure like the Array () mentioned above. It assigns values to a group of variables in one step!For more information, see the manual!Range ();ArrayRange(Mixed low, mixed high [, number step])Creates an array containing a specified range of units.Example: $ arr = range (0,6 );Equival
Array_push ()
Int
Array_push(Array target_array, mixed var [, mixed...])
Add one or more cells to the array from the end! Returns the total number of cells in the new array!
Example:
Copy the PHP content to the clipboard. PHP code:$states =array(‘Ohio’, ‘New York’);array_push($states, ‘California’,‘Texas’);//output: array((‘Ohio’,‘New York’ , ‘California’,‘Texas’);
Array_pop ();The last cell of the arra
The reason we offer US zip code today is that you need to provide this ZIP codeWhen registering for a foreign account, because the U.S. service in general is intended for the United States, or even only for the United States.Here are some zip code listings for the United States .Zip Code City (state)12201 Albany newyork (NY)30301 Atlanta Georgia (GA)21401 Annapolis Maryland (MD)21201 Baltimore Maryland (MD)35201 Birmingham Alabama (AL)14201 Buffalo newyork (NY)60601 CHICAGO Illinois (IL)45201 Ci
In php, there are several methods to traverse and read arrays cyclically. foreach, for, list, each, and while are all possible, but they are more suitable for traversing arrays. Foreach to access and traverse the order
In php, there are several methods to traverse and read arrays cyclically. foreach, for, list, each, and while are all possible, but they are more suitable for traversing arrays.
For foreach access, is the traversal order fixed? In what order does it traverse?
For example, the code
actually only a language structure, everyone in the new array when the use of, no use I can only say, brother, I have no words!
List ()
This function, like the above mentioned array (), is just a language structure that assigns values to a set of variables in one step!
See the Manual for specific examples!
Range ();
Array
Range(Mixed low, mixed high[, number step])
Create an array containing the specified range of cells
Example: $arr =range (0, 6);
Equivalent to $arr =array (0, 1, 2, 3, 4, 5, 6
(‘Ohio’, ‘New York’);array_push($states, ‘California’,‘Texas’);//output: array((‘Ohio’,‘New York’ , ‘California’,‘Texas’);
Array_pop ();The last cell of the array is displayed and returned, and the length of the array is reduced by one. The array pointer is reset after use!Example:Copy the PHP content to the clipboard. PHP code:
$states =array(‘Ohio’, ‘New York’)
written in front of the words:
All of the data in the instance is downloaded from the GitHub and packaged for download.The address is: Http://github.com/pydata/pydata-book there are certain to be explained:
I'm using Python2.7, the code in the book has some bugs, and I use my 2.7 version to tune in.
# Coding:utf-8 from pandas import Series, dataframe import pandas as PD import NumPy as NP df =dataframe ({' Key1 ': [' a], ' a
', ' B ', ' B ', ' A ', ' key2 ': [' one ', ' two ', ' one ', ' two ',
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