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How to check if object (variable) is defined in R?
I'd like to check if some variable is defined in R - without getting an error. How can I do this?
6 Answers
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PyLint, PyChecker or PyFlakes? [closed]
...akes is to statically analyze your code to make sure there will be no name errors or unused variables/imports.
– culebrón
Jun 14 '11 at 18:42
4
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What is an alternative to execfile in Python 3?
...obals)". Personally I like this solution best because I can possibly catch errors before deciding to update the current workspace.
– Ron Kaminsky
Jan 9 at 5:43
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Create a CSV File for a user in PHP
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I'll have "SyntaxError: Unexpected token ILLEGAL" error with the line "fopen("php://output", "w");" When I change it to "$fp = fopen('stats.csv', 'w');" it doesn't show error. But then of course it doesn't work. How should I solve it ?
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How should the ViewModel close the form?
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answered Jan 20 '10 at 11:05
BuddaBudda
16.5k3232 gold badges111111 silver badges191191 bronze badges
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Naming “class” and “id” HTML attributes - dashes vs. underlines [closed]
.../
.demoimage {}
/* Not recommended: uses underscore instead of hyphen */
.error_status {}
/* Recommended */
#video-id {}
.ads-sample {}
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follo...
Detecting request type in PHP (GET, POST, PUT or DELETE)
...':
do_something_with_get($request);
break;
default:
handle_error($request);
break;
}
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PATH issue with pytest 'ImportError: No module named YadaYadaYada'
...s strongly advised not to do so. By doing that, you plant seeds for future errors. Create another module named utils.py and place the code for reusing in tests there.
– hoefling
Jan 15 '19 at 22:09
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What is __pycache__?
...sn't get created, so there's no speedup next time the module is loaded. No error is raised.
– Petr Viktorin
Jul 12 '15 at 13:31
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if a ngSrc path resolves to a 404, is there a way to fallback to a default?
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It's a pretty simple directive to watch for an error loading an image and to replace the src. (Plunker)
Html:
<img ng-src="smiley.png" err-src="http://google.com/favicon.ico" />
Javascript:
var app = angular.module("MyApp", []);
app.directive('errSrc', functi...