javascript - Trying to use Optimist API help() to print usage() -

-

i'm new optimist , i've done bit of googling , try outs, still can't find elegant way add --help option.

i see help() option on documentation. expect following work:

var argv = require('optimist')   .usage('some usage')   .alias('l', 'local')   .describe('l', 'uses local repo')   .help()   .argv

so on shell if typed ./myscript --help show usage. know can inspect argvfor -h or --help option , console(argv.usage) print usage, trying use api instead of hacking it.

is valid question? help.

bitoiu

when want able display usage, want keep pointer object returned require(). because object returned .argv plain object, there no way access help() or showhelp() functions. below contrived example think point in right direction you're trying do.

var optimist = require('optimist')     .usage('$0: example on how use optimist')     .describe('h', 'display usage')     .describe('l', 'uses local repo')     .alias('h', 'help')     .alias('l', 'local');  var argv = optimist.argv;  if (argv.help) {     optimist.showhelp();     process.exit(0); }  if (argv.local) {     // stuff based on local repo     console.info('got -l/--local flag!'); }

then when run code, , pass in either -h or --help, following output:

node ./ex-optimist.js: example on how use optimist  options:   -h, --help   display usage   -l, --local  uses local repo

also note using .help function return usage string, , trying use .argv after make argv variable 'undefined'.


Comments

Post a Comment

Popular posts from this blog

javascript - Image onload event not firing in firefox -

-
i'm creating image preloader. works fine in browsers except firefox (testing firefox 10.0). input array of images called image_list . these images appended dynamically body of document , load callback attached, calls function update_progress . code follows: $(image_list).each(function() { var x = $('<img />') .load(function() {update_progress(percent_loaded += step);}) .attr('src', this) .appendto('body') .css('display', 'none'); .each(function() { if(this.complete) update_progress(percent_loaded += step); }); }); in firefox, load callback , update_progress never called. yet exact same code works fine in chrome , other browsers i've tested. there way detect when image has loaded in firefox? i first check see whether image has height, checking height property. if (the_image.height > 0) { // image loaded (possibly cached) } if have cached ...
Read more

android - getbluetoothservice() called with no bluetoothmanagercallback -

-
i getting getbluetoothservice() called no bluetoothmanagercallback error in android application. i have no idea causing or bluetooth manager callbacks. can give me idea of causing problem or start looking. by reading android source code, seems warning cannot about. source code shows if call bluetoothsocket#connect(); then call bluetoothadapter.getdefaultadapter().getbluetoothservice(null); the key here, null parameter passes in above line. due this, there no callback, , bluetoothsocket class throw out warning. since warning, not think need it. https://android.googlesource.com/platform/frameworks/base/+/master/core/java/android/bluetooth/bluetoothsocket.java line 306 https://android.googlesource.com/platform/frameworks/base/+/master/core/java/android/bluetooth/bluetoothadapter.java line 1610
Read more

sql - ASP.NET SqlDataSource, like on SelectCommand -

-
i'm working on asp.net. have sqldatasource query hardcoded on selectcommand: <asp:sqldatasource id="datasource1" runat="server" cancelselectonnullparameter="false" connectionstring="<%$ connectionstrings:s.properties.settings.connectionstring %>" selectcommand="select * [table] ([col1] case @col1_param when null col1 else @col1_param end) , ([col2] case @col2_param when null col2 else @col2_param end)" selectcommandtype="text"> <selectparameters> <asp:controlparameter controlid="textbox1" name="col1_param" propertyname="text" type="string" /> <asp:controlparameter controlid="textbox2" name="col2_param" propertyname="text" type="string" /> </selectparameters> what want if enter data on 1 textbox only, data display according textbox...
Read more