相比在Apache和Perl中直接采用的经典Times 33算法: hashing function used in Perl 5.005: # Return the hashed value of a string: $hash = perlhash("key") # (Defined by the PERL_HASH macro in hv.h) sub perlhash { $hash = 0; foreach (split //, shift) { $hash = $hash*33 + ord($...
在根目录下创建一个名为utils的文件夹,在文件夹中创建一个localstorage.js文件 export default function tools () { const signSetItem...setEvent.value = val; window.dispatchEvent(setEvent...
Example 4: Search the Particular Value in the Hash Create a Perl file with the following script that searches for a hash value based on the key value that is taken from the user using the exists() function: #!/usr/bin/perl usewarnings; ...
相比在Apache和Perl中直接采用的经典Times 33算法: hashing function used in Perl5.005: # Return the hashed value of a string: $hash = perlhash("key") # (Defined by the PERL_HASH macro in hv.h) sub perlhash { $hash=0; foreach(split//,shift){ $hash=$hash*33+ord($_); } return$h...
To get the size of an hash, we use thekeysfunction in the scalar context. $ ./hash_size.pl the hash has 6 items Perl has add remove elements In the next example we show how to add and remove elements in a hash. add_remove.pl ...
Adding a new key/value pair can be done with one line of code using simple assignment operator. But to remove an element from the hash you need to usedeletefunction as shown below in the example − #!/usr/bin/perl%data=('John Paul'=>45,'Lisa'=>30,'Kumar'=>40);@keys=keys%data...
} 相比在 Apache 和 Perl 中直接采用的经典 Times 33 算法: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. hashing function used in Perl 5.005: # Return the hashed value of a string: $hash = perlhash("key") # (Defined by the PERL_HASH macro in hv.h) sub perlhash { $hash = 0;...
#The keys function in scalar context returns the number of keys in the hash. my $size = keys %india; print "The size of the hash is $size\n"; Perl hash number of elements See above atPerl Hash size Perl Hash map Perl Hash slice ...
It is also common practice to define a hash function that is dependent on each bit of a key► It must be an onto function (surjective).Hashing is so useful that many languages have support for hashing (perl, Lisp, Python).Hash Functions IIIHowever, the function is clearly not one-to-...
hashingfunctionusedinPerl5.005:# Return the hashed valueofa string:$hash=perlhash("key")#(Defined by thePERL_HASHmacroinhv.h)sub perlhash{$hash=0;foreach(split//, shift) {hash=hash*33+ord(}return$hash;} 在PHP的hash算法中, 我们可以看出很处细致的不同. ...