error-handling

问题 I would like JavaScript to display all the validation messages at once when the submit button is clicked. Customer Name: TextBox: *Customer Name must not be blank Address : TextBox: *Address must not be blank City : TextBox: *City must not be blank But it displays only one message at a time, every time the submit button is clicked. This is my code. <form method="post" name="customer" action="newcustcheck.php" onsubmit="return Validate()" > <table width="200"> <tr> <td><div class="message">*<

问题 def delete_starting_evens(lst): for i in lst: if i%2==0: lst.remove(i) else: break return lst The given code produces unexpected results, but I'm not able to figure out from the output where the problem lies. 回答1: That's because you're suppressing items of a list your for-loop is iterating on. Hence it suppresses half of your items. For instance if you call your function on list [2, 2, 4, 6, 1] it will delete the first 2 of your list then move to lst[1] which is 4 (after deletion of the first

问题 I am trying to use random forest in R for classifying some kaggle data but I keep getting the following error whenever I try to use the model which I have created. Error in predict.randomForest(fit, newdata = test, type = "class") : Type of predictors in new data do not match that of the training data I am totally lost as to the reason for this error and Google has not been of much help. Any help or insight will be appreciated. The simple code snippet is given below and its in response to one

问题 I'm trying to write a script to test all DataSources of a WebSphere Cell/Node/Cluster. While this is possible from the Admin Console a script is better for certain audiences. So I found the following article from IBM https://www.ibm.com/support/knowledgecenter/en/SSAW57_8.5.5/com.ibm.websphere.nd.multiplatform.doc/ae/txml_testconnection.html which looks promising as it describles exactly what I need. After having a basic script like: ds_ids = AdminConfig.list("DataSource").splitlines() for ds

问题 I'm working on web scraping some particular websites and therefor I use the python 3 requests package and beautifulsoup. While processing a test over some websites I got this error : requests.exceptions.SSLError: HTTPSConnectionPool(host='autoglassbodyrepair.lawshield.co.uk', port=443): Max retries exceeded with url: / (Caused by SSLError(SSLError("bad handshake: Error([('SSL routines', 'tls_process_server_certificate', 'certificate verify failed')],)",),)) import requests as rq import bs4

问题 My Swift program is crashing with EXC_BAD_INSTRUCTION and one of the following similar errors. What does this error mean, and how do I fix it? Fatal error: Unexpectedly found nil while unwrapping an Optional value or Fatal error: Unexpectedly found nil while implicitly unwrapping an Optional value This post is intended to collect answers to "unexpectedly found nil" issues, so that they are not scattered and hard to find. Feel free to add your own answer or edit the existing wiki answer. 回答1:

问题 How do i catch if form submit fails in vee-validate? I have the following component <template> <ValidationObserver tag='div' class='bg-white pt-6 pb-6 mb-4' v-slot='{ handleSubmit }'> <form @submit.prevent='handleSubmit(onSubmit)' class='mx-auto rounded-lg overflow-hidden pt-6 pb-6 space-y-10' :class="{'is-loading' : isLoading}" > <div class='flex flex-wrap -mx-3 mb-6'> <div class='w-full md:w-3/12 px-3 mb-6 md:mb-5'> <ValidationProvider v-slot='{ classes, errors }' rules='required' name=

问题 I'm trying to store a textbox value to local storage however I'm catching an Uncaught TypeError: Cannot set property 'onclick' of null and not sure exactly why. Everything seems to be referenced correctly. Any insight would be appreciated. <script type="text/javascript"> var save_button = document.getElementById('Save') save_button.onclick = saveData; function saveData() { var input = document.getElementById("saveServer"); localStorage.setItem("server", input.value); var storedValue =

问题 I installed Python package shap for plotting. conda install -c conda-forge shap After installing, I import shap in jupyter notebook but got error. import shap --------------------------------------------------------------------------- ImportError Traceback (most recent call last) <ipython-input-132-efbb001a1501> in <module> ----> 1 import shap ~\AppData\Local\Continuum\anaconda3\lib\site-packages\shap\__init__.py in <module> 3 __version__ = '0.29.3' 4 ----> 5 from .explainers.kernel import

问题 Based on this question (What benefit does the new Exception filter feature provide?). The statement: Exception filters are preferable to catching and rethrowing because they leave the stack unharmed. If the exception later causes the stack to be dumped, you can see where it originally came from, rather than just the last place it was rethrown. after doing some testing, I did not see the difference between both, the old and the new, I still see the exception from the place it was rethrown . So