provide default value for cli params

Signed-off-by: Eric Wang <skygragon@gmail.com>

Author: skygragon

lib/commands/list.js

@@ -12,18 +12,21 @@ var cmd = {
   builder: {
     keyword: {
       type:     'string',
+      default:  '',
       describe: 'Filter problems by keyword'
     },
     query: {
       alias:    'q',
       type:     'string',
+      default:  '',
       describe: 'Filter problems by conditions:\n' +
                 'e(easy),m(medium),h(hard),d(done),l(locked),s(starred)\n' +
                 'Uppercase means negative, e.g. D(not done)'
     },
     stat: {
       alias:    's',
       type:     'boolean',
+      default:  false,
       describe: 'Show problems statistics'
     }
   }

lib/commands/show.js

@@ -17,6 +17,7 @@ var cmd = {
     gen: {
       alias:    'g',
       type:     'boolean',
+      default:  false,
       describe: 'Generate source file from template'
     },
     lang: {

lib/commands/submission.js

@@ -16,6 +16,7 @@ var cmd = {
     all: {
       alias:    'a',
       type:     'boolean',
+      default:  false,
       describe: 'Retrieve for all problems'
     },
     outdir: {

lib/commands/test.js

@@ -14,10 +14,12 @@ var cmd = {
     testcase: {
       alias:    't',
       type:     'string',
+      default:  '',
       describe: 'Provide test case in command line'
     },
     i: {
       type:     'boolean',
+      default:  false,
       describe: 'Provide test case interactively'
     }
   }
@@ -60,7 +62,7 @@ cmd.handler = function(argv) {
     if (!problem.testable)
       return log.fail('not testable? please submit directly!');
 
-    if (testcase !== undefined)
+    if (testcase)
       problem.testcase = testcase.replace(/\\n/g, '\n');
 
     if (!problem.testcase)

lib/commands/user.js

@@ -12,16 +12,19 @@ var cmd = {
     login: {
       alias:    'l',
       type:     'boolean',
+      default:  false,
       describe: 'Login'
     },
     logout: {
       alias:    'L',
       type:     'boolean',
+      default:  false,
       describe: 'Logout'
     },
     stat: {
       alias:    's',
       type:     'boolean',
+      default:  false,
       describe: 'Show user statistics'
     }
   }