JSLint says missing radix parameter

Question

I ran  JSLint on this JavaScript code and it said       Problem at line 32 character 30  Missing radix parameter    This is the code in question   imageIndex   parseInt id substring id length - 1  -1    What is wrong here

User · Answer

You can turn off this rule if you wish to skip that test.

Insert:

radix: false

Under the "rules" property in the tslint.json file.

It's not recommended to do that if you don't understand this exception.

User · Answer

It always a good practice to pass radix with parseInt - parseInt string  radix   For decimal - parseInt id substring id length - 1   10   If the radix parameter is omitted  JavaScript assumes the following   If the string begins with  quot 0x quot   the radix is 16  hexadecimal  If the string begins with  quot 0 quot   the radix is 8  octal   This feature is deprecated If the string begins with any other value  the radix is 10  decimal    Reference

User · Answer

Instead of calling the substring function you could use  slice        imageIndex   parseInt id slice -1   - 1    Here  -1 in slice indicates that to start slice from the last index   Thanks

User · Answer

Prior to ECMAScript 5  parseInt   also autodetected octal literals  which caused problems because many developers assumed a leading 0 would be ignored   So Instead of     var num   parseInt  071            57   Do this   var num   parseInt  071   10       71  var num   parseInt  071   8    var num   parseFloat someValue      Reference

User · Answer

Just put an empty string in the radix place  because parseInt   take two arguments   parseInt string  radix    string The value to parse  If the string argument is not a string  then it is converted to a string  using the ToString abstract operation   Leading whitespace in the string argument is ignored   radix An integer between 2 and 36 that represents the radix  the base in mathematical numeral systems  of the above-mentioned string  Specify 10 for the decimal numeral system commonly used by humans  Always specify this parameter to eliminate reader confusion and to guarantee predictable behavior  Different implementations produce different results when a radix is not specified  usually defaulting the value to 10   imageIndex   parseInt id substring id length - 1  -1  imageIndex   parseInt id substring id length - 1      -1

User · Answer

Adding the following on top of your JS file will tell JSHint to supress the radix warning     jshint -W065      See also  http   jshint com docs  options

User · Answer

To avoid this warning  instead of using   parseInt  999   10     You may replace it by   Number  999       Note that parseInt and Number have different behaviors  but in some cases  one can replace the other

User · Answer

Simply add your custom rule in  eslintrc which looks like that   radix    off  and you will be free of this eslint unnesesery warning  This is for the eslint linter

User · Answer

I solved it with just using the  foo  to convert the string   Keep in mind it s not great for readability  dirty fix    console log    1       1  int

User · Answer

I m not properly answering the question but  I think it makes sense to clear why we should specify the radix    On MDN documentation we can read that   If radix is undefined or 0  or absent   JavaScript assumes the following          If the input string begins with  0   radix is eight  octal  or 10  decimal    Exactly which radix is chosen is implementation-dependent   ECMAScript 5 specifies that 10  decimal  is used  but not all browsers support this yet   For this reason always specify a radix when using parseInt          Source  MDN parseInt

User · Answer

You can also simply add this line right above your parseInt line       eslint-disable-next-line   This will disable eslint check for the next line  Use this if you only need to skip one or two lines

[javascript] JSLint says "missing radix parameter"

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