error-handling

问题 I have a blog going for over 10 years & I would like to run a piece of Javascript on it that catches broken links. I was using: function trackError(e) { var ie = window.event || {}; var errMsg = e.message || ie.errorMessage || "404 error on " + window.location; var errSrc = (e.filename || ie.errorUrl) + ': ' + (e.lineno || ie.errorLine); mailme([errMsg, errSrc]); } // Triggering an error in the console: // You have to use something like setTimeout(function() { notThere(); }, 0); window

问题 I'm learning Error Boundaries in React. I think I've got a good basic understanding but am having trouble implementing them for asynchronous processes, such as loading data. Let's say I have a simple component that, using React hooks, loads some data from a remote API. Since error boundaries won't work using asynchronous processes per se, instead of throwing an error in catch , this component stores the error in state and throws it on next re-render // MovieDb.js import axios from "axios"

问题 I'm learning Error Boundaries in React. I think I've got a good basic understanding but am having trouble implementing them for asynchronous processes, such as loading data. Let's say I have a simple component that, using React hooks, loads some data from a remote API. Since error boundaries won't work using asynchronous processes per se, instead of throwing an error in catch , this component stores the error in state and throws it on next re-render // MovieDb.js import axios from "axios"

问题 How can I ignore the "not in list" error message if I call a.remove(x) when x is not present in list a ? This is my situation: >>> a = range(10) >>> a [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] >>> a.remove(10) Traceback (most recent call last): File "<stdin>", line 1, in <module> ValueError: list.remove(x): x not in list >>> a.remove(9) 回答1: A good and thread-safe way to do this is to just try it and ignore the exception: try: a.remove(10) except ValueError: pass # do nothing! 回答2: I'd personally

问题 How can I ignore the "not in list" error message if I call a.remove(x) when x is not present in list a ? This is my situation: >>> a = range(10) >>> a [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] >>> a.remove(10) Traceback (most recent call last): File "<stdin>", line 1, in <module> ValueError: list.remove(x): x not in list >>> a.remove(9) 回答1: A good and thread-safe way to do this is to just try it and ignore the exception: try: a.remove(10) except ValueError: pass # do nothing! 回答2: I'd personally

问题 In this case I am getting an error. Anyone has any idea what's the problem in the code is? 回答1: param( $fileName = "d:\tmp\file.txt", $name = "Alan" ) @' Mohammed 3 4 5 4 Alan 2 1 3 2 Li 3 5 1 3 '@ | Out-File $fileName -Encoding default $hash = Get-Content $fileName | Where-Object {$_} | ForEach-Object { $array = $_ -split "\s+" @{ $array[0] = [Linq.Enumerable]::Average([int[]]($array[1..($array.Count-1)])) } } if ($hash.Keys -contains $name){ return "$name->$($hash.$name)" } else { return "

问题 In this case I am getting an error. Anyone has any idea what's the problem in the code is? 回答1: param( $fileName = "d:\tmp\file.txt", $name = "Alan" ) @' Mohammed 3 4 5 4 Alan 2 1 3 2 Li 3 5 1 3 '@ | Out-File $fileName -Encoding default $hash = Get-Content $fileName | Where-Object {$_} | ForEach-Object { $array = $_ -split "\s+" @{ $array[0] = [Linq.Enumerable]::Average([int[]]($array[1..($array.Count-1)])) } } if ($hash.Keys -contains $name){ return "$name->$($hash.$name)" } else { return "

问题 Suppose I have a promise as following: p.then(Task1) .then(Task2) .then(Task3) .catch(errorHandler); When Task2 encounters error, how do I know the error is from Task2 in catch ? 回答1: everyone! I had researched demonstrated code by myself. I hoped everyone can review my answer, it's good or not. Introduction: It shows how to trace promise in each handler, used customized error handler to catch error. To understand the workflow of promise . You can copy the following demonstrated code and

问题 Suppose I have a promise as following: p.then(Task1) .then(Task2) .then(Task3) .catch(errorHandler); When Task2 encounters error, how do I know the error is from Task2 in catch ? 回答1: everyone! I had researched demonstrated code by myself. I hoped everyone can review my answer, it's good or not. Introduction: It shows how to trace promise in each handler, used customized error handler to catch error. To understand the workflow of promise . You can copy the following demonstrated code and

问题 B = nx.Graph() B.add_nodes_from(data['movie'].unique(), bipartite=0, label='movie') B.add_nodes_from(data['actor'].unique(), bipartite=1, label='actor') B.add_edges_from(edges, label='acted') A = list(nx.connected_component_subgraphs(B))[0] I am getting the below given error when am trying to use nx.connected_component_subgraphs(G). Please help with this issue. In the dataset there are two coumns(movie and actor), and it's in the form bipartite graph. I want to get connected components for