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JavaScript - cannot set property of undefined

...ever set d[a] to any value. Because of this, d[a] evaluates to undefined, and you can't set properties on undefined. If you add d[a] = {} right after d = {} things should work as expected. Alternatively, you could use an object initializer: d[a] = { greetings: b, data: c }; Or you coul...
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What does -> mean in Python function definitions?

...to attach a metadata string to various types of object. This is amazingly handy, so Python 3 extends the feature by allowing you to attach metadata to functions describing their parameters and return values. There's no preconceived use case, but the PEP suggests several. One very handy one is to al...
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'parent.relativePath' points at my com.mycompany:MyProject instead of org.apache:apache - Why?

.... Set the value to an empty string in case you want to disable the feature and always resolve the parent POM from the repositories. Default value is: ../pom.xml. share | improve this answer ...
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phpmyadmin logs out after 1440 secs

In my local development Ubuntu box I use MySQL and phpmyadmin to work with the database. 24 Answers ...
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How to apply shell command to each line of a command output?

Suppose I have some output from a command (such as ls -1 ): 8 Answers 8 ...
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What’s the best way to reload / refresh an iframe?

...yId('some_frame_id').location.reload(); The method that worked for both FF and Chrome was document.getElementById('iframeid').src = document.getElementById('iframeid').src – Mike Bevz Aug 11 '11 at 13:09 ...
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How to style the with only CSS?

...e: none; appearance: none; } For IE 11 support, you can use [::-ms-expand][15]. select::-ms-expand { /* for IE 11 */ display: none; } Old Answer Unfortunately what you ask is not possible by using pure CSS. However, here is something similar that you can choose as a work around. Check t...
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Using the last-child selector

...y used across browsers. In particular, Internet Explorer versions < 9, and Safari < 3.2 definitely don't support it, although Internet Explorer 7 and Safari 3.2 do support :first-child, curiously. Your best bet is to explicitly add a last-child (or similar) class to that item, and apply li....
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Command substitution: backticks or dollar sign / paren enclosed? [duplicate]

What's the preferred way to do command substitution in bash? 3 Answers 3 ...
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What is a stored procedure?

What is a "stored procedure" and how do they work? 17 Answers 17 ...