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What is an undefined reference/unresolved external symbol error and how do I fix it?

...cuted. [SNIP] Each source character set member in a character literal or a string literal, as well as each escape sequence and universal-character-name in a character literal or a non-raw string literal, is converted to the corresponding member of the execution character set; [SNIP] Adjacent string ...
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Remove all special characters, punctuation and spaces from string

I need to remove all special characters, punctuation and spaces from a string so that I only have letters and numbers. 16 A...
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Int to Char in C#

...e.WriteLine((char)49 == '1'); Will give True. As will char c = (char)49; string s = "1two3"; Console.WriteLine(c == s[0]); Using this cast is perfectly fine. Your explanation does not provide a valid example of it not working. Furthermore, Console.WriteLine((char)49 == 1); is false which essenti...
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Javascript/DOM: How to remove all events of a DOM object?

... that we cannot // use node as Object keys, as they'd get coerced into a string _eventHandlers[event].push({ node: node, handler: handler, capture: capture }) node.addEventListener(event, handler, capture) } const removeAllListeners = (targetNode, event) => { // remove listeners from the...
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Can I query MongoDB ObjectId by date?

...ObjectId embedded with a given datetime */ /* Accepts both Date object and string input */ function objectIdWithTimestamp(timestamp) { /* Convert string date to Date object (otherwise assume timestamp is a date) */ if (typeof(timestamp) == 'string') { timestamp = new Date(timestamp)...
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Normalize data in pandas

... If your dataframe has strings in some columns, see this answer – netskink Jul 22 '18 at 0:21  |  ...
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What's the difference between and , and ?

... <strong> and <em> add extra semantic meaning to your document. It just so happens that they also give a bold and italic style to your text. You could of course override their styling with CSS. <b> and <i> on the other hand only apply...
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TypeLoadException says 'no implementation', but it is implemented

...faceDef, add just one class, and build: public interface IInterface { string GetString(string key); //short GetShort(string key); } Create a second class library project: Implementation (with separate solution), copy InterfaceDef.dll into project directory and add as file reference, add ju...
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Selecting and manipulating CSS pseudo-elements such as ::before and ::after using jQuery

...) with $('p')[0] when using jQuery, for slightly shorter code. Pros: any string can be dynamically inserted into the style Cons: original styles aren't altered, just overridden; repeated (ab)use can make the DOM grow arbitrarily large 3) Alter a different DOM attribute You can also to use att...
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When to use a Content Provider

... if you don't intend to make it public. It's good practice to provide the extra level of abstraction over your data to make it easier to change internally. What if you decide to change the underlying database structure at a later time? If you use a ContentProvider you can contain all the structur...