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calculator.js ➔ key_detect_calc   F
last analyzed

↳ Parent: config/js/calculator.js

Complexity

Conditions 16
Paths 14

Size

Total Lines 58
Code Lines 43

Duplication

Lines 0
Ratio 0 %

Importance

Changes 0
Metric Value
cc 16
eloc 43
nc 14
nop 2
dl 0
loc 58
rs 2.4
c 0
b 0
f 0

How to fix   Long Method    Complexity   

Long Method

Small methods make your code easier to understand, in particular if combined with a good name. Besides, if your method is small, finding a good name is usually much easier.

For example, if you find yourself adding comments to a method's body, this is usually a good sign to extract the commented part to a new method, and use the comment as a starting point when coming up with a good name for this new method.

Commonly applied refactorings include:

Complexity

Complex classes like calculator.js ➔ key_detect_calc often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.

Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.

1 
calc_array = new Array();
0 ignored issues
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Bug introduced by
The variable calc_array seems to be never declared. Assigning variables without defining them first makes them global. If this was intended, consider making it explicit like using window.calc_array.
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Coding Style Best Practice introduced by
Using the Array constructor is generally discouraged. Consider using an array literal instead.
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2 
var calcul=0;
3 
var pas_ch=0;
4 
function $id(id)
5 
{
6 
        return document.getElementById(id);
7 
}
8 
function f_calc(id,n)
9 
{
10 
        if(n=='ce')
11 
        {
12 
                init_calc(id);
13 
        }
14 
        else if(n=='=')
15 
        {
16 
                if(calc_array[id][0]!='=' && calc_array[id][1]!=1)
17 
                {
18 
                        eval('calcul='+calc_array[id][2]+calc_array[id][0]+calc_array[id][3]+';');
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Security Performance introduced by
Calls to eval are slow and potentially dangerous, especially on untrusted code. Please consider whether there is another way to achieve your goal.
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19 
                        calc_array[id][0] = '=';
20 
                        $id(id+'_result').value=calcul;
21 
                        calc_array[id][2]=calcul;
22 
                        calc_array[id][3]=0;
23 
                }
24 
        }
25 
        else if(n=='+-')
26 
        {
27 
                $id(id+'_result').value=$id(id+'_result').value*(-1);
28 
                if(calc_array[id][0]=='=')
29 
                {
30 
                        calc_array[id][2] = $id(id+'_result').value;
31 
                        calc_array[id][3] = 0;
32 
                }
33 
                else
34 
                {
35 
                        calc_array[id][3] = $id(id+'_result').value;
36 
                }
37 
                pas_ch = 1;
38 
        }
39 
        else if(n=='nbs')
40 
        {
41 
                if($id(id+'_result').value<10 && $id(id+'_result').value>-10)
42 
                {
43 
                        $id(id+'_result').value='';
44 
                }
45 
                else
46 
                {
47 
                        $id(id+'_result').value=$id(id+'_result').value.slice(0,$id(id+'_result').value.length-1);
48 
                }
49 
                if(calc_array[id][0]=='=')
50 
                {
51 
                        calc_array[id][2] = $id(id+'_result').value;
52 
                        calc_array[id][3] = 0;
53 
                }
54 
                else
55 
                {
56 
                        calc_array[id][3] = $id(id+'_result').value;
57 
                }
58 
        }
59 
        else
60 
        {
61 
                        if(calc_array[id][0]!='=' && calc_array[id][1]!=1)
62 
                        {
63 
                                eval('calcul='+calc_array[id][2]+calc_array[id][0]+calc_array[id][3]+';');
0 ignored issues
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Security Performance introduced by
Calls to eval are slow and potentially dangerous, especially on untrusted code. Please consider whether there is another way to achieve your goal.
Loading history...
64 
                                $id(id+'_result').value=calcul;
65 
                                calc_array[id][2]=calcul;
66 
                                calc_array[id][3]=0;
67 
                        }
68 
                        calc_array[id][0] = n;
69 
        }
70 
        if(pas_ch==0)
71 
        {
72 
                calc_array[id][1] = 1;
73 
        }
74 
        else
75 
        {
76 
                pas_ch=0;
77 
        }
78 
        document.getElementById(id+'_result').focus();
79 
        return true;
80 
}
81 
function add_calc(id,n)
82 
{
83 
        if(calc_array[id][1]==1)
84 
        {
85 
                $id(id+'_result').value=n;
86 
        }
87 
        else
88 
        {
89 
                $id(id+'_result').value+=n;
90 
        }
91 
        if(calc_array[id][0]=='=')
92 
        {
93 
                calc_array[id][2] = $id(id+'_result').value;
94 
                calc_array[id][3] = 0;
95 
        }
96 
        else
97 
        {
98 
                calc_array[id][3] = $id(id+'_result').value;
99 
        }
100 
        calc_array[id][1] = 0;
101 
        document.getElementById(id+'_result').focus();
102 
        return true;
103 
}
104 
function init_calc(id)
105 
{
106 
        $id(id+'_result').value='';
107 
        calc_array[id] = new Array('=',1,'0','0',0);
0 ignored issues
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Coding Style Best Practice introduced by
Using the Array constructor is generally discouraged. Consider using an array literal instead.
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108 
        document.getElementById(id+'_result').focus();
109 
        return true;
110 
}
111 
function key_detect_calc(id,evt)
112 
{
113 
        if((evt.keyCode>95) && (evt.keyCode<106))
114 
        {
115 
                var nbr = evt.keyCode-96;
116 
                add_calc(id,nbr);
117 
        }
118 
        else if((evt.keyCode>47) && (evt.keyCode<58))
119 
        {
120 
                var nbr = evt.keyCode-48;
0 ignored issues
– show
Comprehensibility Naming Best Practice introduced by
The variable nbr already seems to be declared on line 115. Consider using another variable name or omitting the var keyword.

This check looks for variables that are declared in multiple lines. There may be several reasons for this.

In the simplest case the variable name was reused by mistake. This may lead to very hard to locate bugs.

If you want to reuse a variable for another purpose, consider declaring it at or near the top of your function and just assigning to it subsequently so it is always declared.

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121 
                add_calc(id,nbr);
122 
        }
123 
        else if(evt.keyCode==107)
124 
        {
125 
                f_calc(id,'+');
126 
        }
127 
        else if(evt.keyCode==109)
128 
        {
129 
                f_calc(id,'-');
130 
        }
131 
        else if(evt.keyCode==106)
132 
        {
133 
                f_calc(id,'*');
134 
        }
135 
        else if(evt.keyCode==111)
136 
        {
137 
                f_calc(id,'');
138 
        }
139 
        else if(evt.keyCode==110)
140 
        {
141 
                add_calc(id,'.');
142 
        }
143 
        else if(evt.keyCode==190)
144 
        {
145 
                add_calc(id,'.');
146 
        }
147 
        else if(evt.keyCode==188)
148 
        {
149 
                add_calc(id,'.');
150 
        }
151 
        else if(evt.keyCode==13)
152 
        {
153 
                f_calc(id,'=');
154 
        }
155 
        else if(evt.keyCode==46)
156 
        {
157 
                f_calc(id,'ce');
158 
        }
159 
        else if(evt.keyCode==8)
160 
        {
161 
                f_calc(id,'nbs');
162 
        }
163 
        else if(evt.keyCode==27)
164 
        {
165 
                f_calc(id,'ce');
166 
        }
167 
        return true;
168 
}