There is a built-in "assert" library...
On Sunday, May 26, 2013 8:54:26 PM UTC+4, Mathieu Turcotte wrote: > > Hi all, > > Precond is a small library inspired by Guava's precondition checking > utilities<https://code.google.com/p/guava-libraries/wiki/PreconditionsExplained>. > > It provides the same basic API plus some additions relevant to a > dynamically typed language like Javascript. It also leverages some of > Javascript's introspection capabilities to generate stack traces starting > from the precondition check itself, i.e. the same stack trace that would be > generated by a plain throw statement. > > Here's a simple example. > > function div(a, b) { >> precond.checkArgument(b != 0, 'Expected denominator != 0 but was %s.', >> b); >> return a / b; >> } > > > The following precondition checks are provided. > > - checkArgument(expression, [messageFormat, [formatArgs, ...]]) > - checkState(expression, [messageFormat, [formatArgs, ...]]) > - checkIsDef(expression, [messageFormat, [formatArgs, ...]]) > - checkIsDefAndNotNull(expression, [messageFormat, [formatArgs, ...]]) > - checkIsString(expression, [messageFormat, [formatArgs, ...]]) > - checkIsArray(expression, [messageFormat, [formatArgs, ...]]) > - checkIsNumber(expression, [messageFormat, [formatArgs, ...]]) > - checkIsBoolean(expression, [messageFormat, [formatArgs, ...]]) > - checkIsFunction(expression, [messageFormat, [formatArgs, ...]]) > - checkIsObject(expression, [messageFormat, [formatArgs, ...]]) > > The documentation, source code and examples can be found on Github. As > usual, the module can be installed from npm. > > - https://github.com/MathieuTurcotte/node-precond > - https://npmjs.org/package/precond > > Simple, but hopefully useful stuff. > > Cheers, > Mathieu > -- -- Job Board: http://jobs.nodejs.org/ Posting guidelines: https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines You received this message because you are subscribed to the Google Groups "nodejs" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nodejs?hl=en?hl=en --- You received this message because you are subscribed to the Google Groups "nodejs" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
