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Most efficient way to concatenate strings in JavaScript?

...once. is wrong, because it's based on a flawed test. That test never actually appends into the DOM. This fixed test shows that creating the string all at once before rendering it is much, MUCH faster. It's not even a contest. (Sorry this is a separate answer, but I don't have enough rep to comme...
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Proper use of errors

... It seems to be missing a more general type for invalid argument. Not all invalid arguments fall under RangeError. Should you define custom types or just throw new Error("<message>");? – anddero Apr 5 at 7:39 ...
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How do .gitignore exclusion rules actually work?

...so git won't look inside) instead of the files within the directory (which allows for the exclusion). Think of the exclusions as saying "but not this one" rather than "but include this" - "ignore this directory (/a/b/c/) but not this one (foo)" doesn't make much sense; "ignore all files in this dir...
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Send POST Request with Data Specified in File via Curl

...l" \ --data-binary "@path/to/file" In the example above, -i prints out all the headers so that you can see what's going on, and -X POST makes it explicit that this is a post. Both of these can be safely omitted without changing the behaviour on the wire. The path to the file needs to be preced...
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Eclipse and Windows newlines

... you can use the File : Convert Line Delimiters to : Unix command to "fix" all files in the project at once. – Tal Weiss Nov 1 '12 at 22:03 add a comment  |...
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What is the difference between float and double?

...i.e. using one or the other does not seem to affect the results. Is this really the case? When are floats and doubles interchangeable? What are the differences between them? ...
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How do I connect to a specific Wi-Fi network in Android programmatically?

...conf.wepKeys[0] = "\"" + networkPass + "\""; conf.wepTxKeyIndex = 0; conf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE); conf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40); For WPA network you need to add passphrase like this: conf.preSharedKey = "\""+ networkPass +"\"...
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What's the difference between JPA and Hibernate? [closed]

...e has more features than JPA 2. But from a practical point of view, what really is the difference? 22 Answers ...
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How can I shuffle the lines of a text file on the Unix command line or in a shell script?

... well, you get the picture. It has been pointed out that sort -R doesn't really shuffle but instead sort items according to their hash value. [Editor's note: sort -R almost shuffles, except that duplicate lines / sort keys always end up next to each other. In other words: only with unique input lin...
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What is difference between XML Schema and DTD?

... [...] So what are some of the other differences which might be especially important when we are converting a DTD? Let's take a look. Typing The most significant difference between DTDs and XML Schema is the capability to create and use datatypes in Schema in conjunction with element ...