associative-array

问题 I'm trying to dynamically create an associative array whose values are arrays. My current attempt is as follows but I'm not sure if it is correct or efficent. foreach $line (@lines) # read line from a text dictionary { chomp( $line ); my($word, $definition) = split(/\s/, $line, 2); # $definition =~ s/^\s+|\s+$//g ; # trim leading and trailing whitespace if( exists $dict{$word} ) { @array = $dict{$word}; $len = scalar @array; $dict{$word}[$len] = $definition; } else { $dict{$word}[0] =

问题 In Javascript I have a JSON object from which I want to process just the items: var json = { itema: {stuff: 'stuff'}, itemb: {stuff: 'stuff'}, itemc: {stuff: 'stuff'}, itemd: {stuff: 'stuff'} } In Python I could do print json.items() [{stuff: 'stuff'},{stuff: 'stuff'},{stuff: 'stuff'},{stuff: 'stuff'}] Can I do this is js? 回答1: You cannot do this the same way as in python without extending Object.prototype, which you don't want to do, because it is the path to misery. You could create a

问题 In Javascript I have a JSON object from which I want to process just the items: var json = { itema: {stuff: 'stuff'}, itemb: {stuff: 'stuff'}, itemc: {stuff: 'stuff'}, itemd: {stuff: 'stuff'} } In Python I could do print json.items() [{stuff: 'stuff'},{stuff: 'stuff'},{stuff: 'stuff'},{stuff: 'stuff'}] Can I do this is js? 回答1: You cannot do this the same way as in python without extending Object.prototype, which you don't want to do, because it is the path to misery. You could create a

问题 Is there a way to enable the use of fetch_assoc() several times on the same page with prepared statements? $data = $conn->prepare("SELECT * FROM some_table WHERE id=?"); $data->bind_param('i',$id); $data->execute(); $result = $data->get_result(); I'd like to be able to use fetch_assoc() on the same page as many times as I want as many different ways I want. If I want to loop twice, I should be able to do that. If I want to loop and do a single fetch, I should also be able to do that. Right

问题 Is there a way to enable the use of fetch_assoc() several times on the same page with prepared statements? $data = $conn->prepare("SELECT * FROM some_table WHERE id=?"); $data->bind_param('i',$id); $data->execute(); $result = $data->get_result(); I'd like to be able to use fetch_assoc() on the same page as many times as I want as many different ways I want. If I want to loop twice, I should be able to do that. If I want to loop and do a single fetch, I should also be able to do that. Right

问题 In bash, associative arrays (also known as dictionaries or hash maps) are unordered. For the associative array a we can list all keys (also known as indices) with ${!a[@]} and all values with ${a[@]} . I know that these constructs do not expand in a fixed order. I wondered if there are at least some guarantees. I couldn't find any. However, it seems unrealistic that [ "${a[*]}" = ${a[*]} ] will fail in any implementation. Likewise, it seems that ${!a[@]} expands in the same order as ${a[@]} .

问题 I have two string variables: $names = "Sean Connery,George Lazenby,Roger Moore,Timothy Dalton,Pierce,Brosnan,Daniel Craig"; $movies = "Dr. No/On Her Majesty's Secret Service/Live and Let Die/The Living Daylights/GoldenEye/Casino Royal"; I need to convert these two strings into an associative array with $names as the index and $movies as the values . How would I do this? 回答1: I would do it with something like this: $array = array_combine(explode(',',$names),explode('/',$movies)); 来源： https:/

问题 I have two string variables: $names = "Sean Connery,George Lazenby,Roger Moore,Timothy Dalton,Pierce,Brosnan,Daniel Craig"; $movies = "Dr. No/On Her Majesty's Secret Service/Live and Let Die/The Living Daylights/GoldenEye/Casino Royal"; I need to convert these two strings into an associative array with $names as the index and $movies as the values . How would I do this? 回答1: I would do it with something like this: $array = array_combine(explode(',',$names),explode('/',$movies)); 来源： https:/

来源： https://stackoverflow.com/questions/64075777/how-to-display-the-php-multiple-dimensional-associative-array-in-html-table

问题 I have following two multidimensional arrays: First array: $array_1_data = Array ( [0] => Array ( [id] => 1 [name] => IT [slug] => it ) [1] => Array ( [id] => 2 [name] => Accounting [slug] => accounting ) ) Second array: $array_2_data = Array ( [0] => Array ( [cid] => 3 [jid] => 24061 ) [1] => Array ( [cid] => 1 [jid] => 24062 ) ) Expected result: $some_array = Array ( [0] => Array ( [id] => 1 [name] => IT [slug] => it ) ) I won't mind having [cid] in the result. I want to intersect these two