Place the line from #1 in your code, and use the functions:

  • Array all:
    Code:
    [1, 2, 3, 4, 5].l(function(x) { return x <= 5; })
    returns true because all of them are less than 5.
  • Array any:
    Code:
    [1, 2, 3, 4, 5].n(function(x) { return x >= 6; })
    returns false because no element is more than or equal to 6.
  • Array where:
    Code:
    [1, 2, 3, 4, 5].w(function(x) { return x % 2 === 0; })
    returns [2, 4]; the only numbers in the array that are odd.
  • String startsWith:
    Code:
    "Hello world".s("Hello")
    returns true because "Hello world" starts with "Hello".
  • String endsWith is along the same lines as startsWith, and it's named "e".
  • String indexOf is the default functionality with the shorter name of "i".
  • String trim trims characters from both sides:
    Code:
    "tttFit".t('t')
    returns "Fi" because 't's have been trimmed off both sides. If passed no argument, null or a blank string, it trims spaces.