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E11000 duplicate key error index in mongodb mongoose
... the sparse index to filter these null values from the unique index and avoid the error.
unique indexes
Sparse indexes only contain entries for documents that have the indexed field, even if the index field contains a null value.
In other words, a sparse index is ok with multiple documents all ha...
A numeric string as array key in PHP
...thought it would be fun to point out that the behaviour is similar but not identical to JavaScript object keys.
foo = { '10' : 'bar' };
foo['10']; // "bar"
foo[10]; // "bar"
foo[012]; // "bar"
foo['012']; // undefined!
sh...
How do I auto-hide placeholder text upon focus using css or jquery?
...e this functionality when the field is disabled here is the CSS code: /* Hiding the placeholder text (if any), when the holding field is disabled */ input:disabled::-webkit-input-placeholder { color:transparent; } input:disabled:-moz-placeholder { color:transparent; } input:disabled::-moz-placehold...
Using an HTML button to call a JavaScript function
...in different situations.
1: There's defining it in the HTML:
<input id="clickMe" type="button" value="clickme" onclick="doFunction();" />
2: There's adding it to the DOM property for the event in Javascript:
//- Using a function pointer:
document.getElementById("clickMe").onclick = doFu...
Load and execution sequence of a web page?
...kkk.png");
});
</script>
</head>
<body>
<img id="img" src="abc.jpg" style="width:400px;height:300px;"/>
<script src="kkk.js" type="text/javascript"></script>
</body>
</html>
roughly the execution flow is about as follows:
The HTML docum...
MySql export schema without data
...
Also consider using the --single-transaction option if you don't want or can't do table locks.
– Jim
Jan 22 '13 at 21:55
...
Configuring Vim for C++
...
NERDTree http://www.vim.org/scripts/script.php?script_id=1658
Exuberant ctags (vim already supports the hotkeys natively) http://ctags.sourceforge.net/
taglist: http://vim-taglist.sourceforge.net/
snipmate: http://www.vim.org/scripts/script.php?script_id=2540
I don't do omni...
iPhone App Minus App Store?
...00 devices. The developer program has the details but it involves adding UUIDs for each of the devices to your application package. UUIDs can be easiest retrieved using Ad Hoc Helper available from the App Store. For further details on this method, see Craig Hockenberry's Beta testing on iPhone 2.0 ...
How do you receive a url parameter with a spring controller mapping
...ing @RequestParam instead of @ModelAttribute, e.g.
@RequestMapping("/{someID}")
public @ResponseBody int getAttr(@PathVariable(value="someID") String id,
@RequestParam String someAttr) {
}
You can even omit @RequestParam altogether if you choose, and Spring will ...
How to select option in drop down using Capybara
... well: select('option_name', from: 'select_box'). Where the values can be: id, name, related label element. You can read more about Capybara and DSL options here.
– Nesha Zoric
Feb 26 '18 at 12:37
...