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Equivalent of .try() for a hash to avoid “undefined method” errors on nil? [duplicate]
In Rails we can do the following in case a value doesn't exist to avoid an error:
12 Answers
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Send data from activity to fragment in Android
...ragobj.setArguments(bundle);
and in Fragment onCreateView method:
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
String strtext = getArguments().getString("edttext");
return inflater.inflate(R.layout.fragment, cont...
Changing the selected option of an HTML Select element
...ain old JavaScript:
var val = "Fish";
var sel = document.getElementById('sel');
document.getElementById('btn').onclick = function() {
var opts = sel.options;
for (var opt, j = 0; opt = opts[j]; j++) {
if (opt.value == val) {
sel.selectedIndex = j;
break;
}
}
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Android: Is it possible to display video thumbnails?
I created a video recording application with library dialog. The library dialog displays the list of recorded videos where each item consists of icon, video title, tags and location information the following way:
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Clone private git repo with dockerfile
...# to retrieve this private key file from the corresponding image layer
ADD id_rsa /root/.ssh/id_rsa
# Create known_hosts
RUN touch /root/.ssh/known_hosts
# Add bitbuckets key
RUN ssh-keyscan bitbucket.org >> /root/.ssh/known_hosts
# Clone the conf files into the docker container
RUN git clon...
PHP - include a php file and also send query parameters
...l access $someVar in the included file directly (even though you might consider a class based structure where you pass $someVar as a parameter or refer to a few global variables).
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Convert Pandas column containing NaNs to dtype `int`
... .csv file to a Pandas dataframe as below. For one of the columns, namely id , I want to specify the column type as int . The problem is the id series has missing/empty values.
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How to check if an array value exists?
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Is it possible to have an array with identical keys? Wouldn't the second value overwrite the original?
– Citricguy
Jun 9 '12 at 1:51
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Find rows that have the same value on a column in MySQL
...rflow.com/questions/41359879/…
– Syed Asad Abbas Zaidi
Dec 28 '16 at 11:01
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Set the value of an input field
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This is one way of doing it:
document.getElementById("mytext").value = "My value";
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