> Meinereiner ist zumindest zeitweise in Overcarefullington sozialisiert worden und möchte auf die richtige Schreibweise der `needles` hinweisen… Das ist schnell nachgebessert. Außerdem habe ich mir die Frechheit erlaubt, bei mir nicht gefallenden Daten ein paar Ausnahmen zu schmeißen. ~~~js function CharCounter( haystack, needles=false, log=false ) { var counter={}; if ( null === needles || false === needles || true === needles || '' == needles ) { throw( 'Error: needles is exact null, true, false - or empty' ) ; } if ( 'string' == typeof needles ) { needles = needles.split(''); } if ( ! Array.isArray( needles ) ) { needles[0] = needles; } for ( var i=0; i < needles.length; i++ ) { if ( 'string' == typeof needles[i] ) { if ( 1 < needles[i].length ) { throw('Error: String with length > 1 in array needles[' + i + ']: ' + JSON.stringify( needles[i] ) ) ; } else if ( 1 == needles[i].length ) { counter[needles[i]] = 0; } else { console.warn( 'Warníng: Empty string-element in array needles at position ' + i + ' ignored.' ); } } else { throw( 'Error: Element at position ' + i + ' in array needles is not of type string: It is a ' + typeof( needles[i] ) + '. Value(s): '+ JSON.stringify( needles[i] ) ); } } needles = Object.keys(counter); needles.sort(); haystack.split('').forEach( function ( item, index, arr ) { for ( var i = 0; i <= needles.length; i++ ) { if( item == needles[i] ) { counter[needles[i]]++; } } } ); if ( log ) { for ( i=0; i < needles.length; i++ ) { console.log( 'Char »' + needles[i] + '« has ' + counter[needles[i]] + ' founds.' ); } } return counter; } str = 'arg1.forEach(wert => (wert % 2 ? anzUngerade : anzGerade).push(korr005(wert));'; CharCounter( str, '()', true ); /////////////////// Tests: ///////////////////////////////////////////////////////////////// //CharCounter( str, '()[]{}\'"', true ); /* Fine */ //CharCounter( str, str , true ); /* Fine: Count all Chars in haystack */ //CharCounter( str, [' ',''] , true ); /* Fine with warning */ //CharCounter( str, null , true ); /* Error */ //CharCounter( str, true , true ); /* Error */ //CharCounter( str, ['(', null ] , true ); /* Error */ //CharCounter( str, [' ', 100.8 ], true ); /* Error */ //CharCounter( str, [ ' ', [ 'f','c' ] ], true ); /* Error */ ~~~ Ausgabe: ~~~text,bad Char »(« has 4 founds. Char »)« has 3 founds. ~~~ Wichtiger wäre die Frage, [warum ich die Klammern zähle](https://forum.selfhtml.org/self/2022/jul/28/ruckspeichern-in-argument/1800785#m1800785)...

> Meinereiner ist zumindest zeitweise in Overcarefullington sozialisiert worden und möchte auf die richtige Schreibweise der `needles` hinweisen… Das ist schnell nachgebessert. Außerdem habe ich mir die Frechheit erlaubt, bei mir nicht gefallenden Daten ein paar Ausnahmen zu schmeißen. ~~~js function CharCounter( haystack, needles=false, log=false ) { var counter={}; if ( null === needles || false === needles || true === needles || '' == needles ) { throw( 'Error: needles is exact null, true, false - or empty' ) ; } if ( 'string' == typeof needles ) { needles = needles.split(''); } if ( ! Array.isArray( needles ) ) { needles[0] = needles; } else { console.log( 'Gefunden: ' + JSON.stringify( needles ) ) ; } for ( var i=0; i < needles.length; i++ ) { if ( 'string' == typeof needles[i] ) { if ( 1 < needles[i].length ) { throw('Error: String with length > 1 in array needles[' + i + ']: ' + JSON.stringify( needles[i] ) ) ; } else if ( 1 == needles[i].length ) { counter[needles[i]] = 0; } else { console.warn( 'Warníng: Empty string-element in array needles at position ' + i + ' ignored.' ); } } else { throw( 'Error: Element at position ' + i + ' in array needles is not of type string: It is a ' + typeof( needles[i] ) + '. Value(s): '+ JSON.stringify( needles[i] ) ); } } needles = Object.keys(counter); needles.sort(); haystack.split('').forEach( function ( item, index, arr ) { for ( var i = 0; i <= needles.length; i++ ) { if( item == needles[i] ) { counter[needles[i]]++; } } } ); if ( log ) { for ( i=0; i < needles.length; i++ ) { console.log( 'Char »' + needles[i] + '« has ' + counter[needles[i]] + ' founds.' ); } } return counter; } str = 'arg1.forEach(wert => (wert % 2 ? anzUngerade : anzGerade).push(korr005(wert));'; CharCounter( str, '()', true ); /////////////////// Tests: ///////////////////////////////////////////////////////////////// //CharCounter( str, '()[]{}\'"', true ); /* Fine */ //CharCounter( str, str , true ); /* Fine: Count all Chars in haystack */ //CharCounter( str, [' ',''] , true ); /* Fine with warning */ //CharCounter( str, null , true ); /* Error */ //CharCounter( str, true , true ); /* Error */ //CharCounter( str, ['(', null ] , true ); /* Error */ //CharCounter( str, [' ', 100.8 ], true ); /* Error */ //CharCounter( str, [ ' ', [ 'f','c' ] ], true ); /* Error */ ~~~ Ausgabe: ~~~text,bad Char »(« has 4 founds. Char »)« has 3 founds. ~~~ Wichtiger wäre die Frage, [warum ich die Klammern zähle](https://forum.selfhtml.org/self/2022/jul/28/ruckspeichern-in-argument/1800785#m1800785)...

> Meinereiner ist zumindest zeitweise in Overcarefullington sozialisiert worden und möchte auf die richtige Schreibweise der `needles` hinweisen… Das ist schnell nachgebessert: ~~~js function CharCounter( haystack, needles=false, log=false ) { var counter={}; if ( null === needles || false === needles || true === needles || '' == needles ) { throw( 'Error: needles is exact null, true, false - or empty' ) ; } if ( 'string' == typeof needles ) { needles = needles.split(''); } if ( ! Array.isArray( needles ) ) { needles[0] = needles; } else { console.log( 'Gefunden: ' + JSON.stringify( needles ) ) ; } for ( var i=0; i < needles.length; i++ ) { if ( 'string' == typeof needles[i] ) { if ( 1 < needles[i].length ) { throw('Error: String with length > 1 in array needles[' + i + ']: ' + JSON.stringify( needles[i] ) ) ; } else if ( 1 == needles[i].length ) { counter[needles[i]] = 0; } else { console.warn( 'Warníng: Empty string-element in array needles at position ' + i + ' ignored.' ); } } else { throw( 'Error: Element at position ' + i + ' in array needles is not of type string: It is a ' + typeof( needles[i] ) + '. Value(s): '+ JSON.stringify( needles[i] ) ); } } needles = Object.keys(counter); needles.sort(); haystack.split('').forEach( function ( item, index, arr ) { for ( var i = 0; i <= needles.length; i++ ) { if( item == needles[i] ) { counter[needles[i]]++; } } } ); if ( log ) { for ( i=0; i < needles.length; i++ ) { console.log( 'Char »' + needles[i] + '« has ' + counter[needles[i]] + ' founds.' ); } } return counter; } str = 'arg1.forEach(wert => (wert % 2 ? anzUngerade : anzGerade).push(korr005(wert));'; CharCounter( str, '()', true ); /////////////////// Tests: ///////////////////////////////////////////////////////////////// //CharCounter( str, '()[]{}\'"', true ); /* Fine */ //CharCounter( str, str , true ); /* Fine: Count all Chars in haystack */ //CharCounter( str, [' ',''] , true ); /* Fine with warning */ //CharCounter( str, null , true ); /* Error */ //CharCounter( str, true , true ); /* Error */ //CharCounter( str, ['(', null ] , true ); /* Error */ //CharCounter( str, [' ', 100.8 ], true ); /* Error */ //CharCounter( str, [ ' ', [ 'f','c' ] ], true ); /* Error */ ~~~ Ausgabe: ~~~text,bad Char »(« has 4 founds. Char »)« has 3 founds. ~~~ Wichtiger wäre die Frage, [warum ich die Klammern zähle](https://forum.selfhtml.org/self/2022/jul/28/ruckspeichern-in-argument/1800785#m1800785)...