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Why can't decimal numbers be represented exactly in binary?

...1/3, 1/9, 1/27, or any rational in decimal notation. We do it by adding an extra symbol. For example, a line over the digits that repeat in the decimal expansion of the number. What we need to represent decimal numbers as a sequence of binary numbers are 1) a sequence of binary numbers, 2) a radix p...
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How do I implement basic “Long Polling”?

...ew message arrives). Here is a really basic example, which sends a simple string after 2-10 seconds. 1 in 3 chance of returning an error 404 (to show error handling in the coming Javascript example) msgsrv.php <?php if(rand(1,3) == 1){ /* Fake an error */ header("HTTP/1.0 404 Not Found...
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Deserialize from string instead TextReader

... public static string XmlSerializeToString(this object objectInstance) { var serializer = new XmlSerializer(objectInstance.GetType()); var sb = new StringBuilder(); using (TextWriter writer = new StringWriter(sb)) { ...
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What is the meaning of “$” sign in JavaScript

...t can be almost anything but is usually "JQuery". However, in ES6 it is a string interpolation operator in a template "literal" eg. var s = "new" ; // you can put whatever you think appropriate here. var s2 = `There are so many ${s} ideas these days !!` ; //back-ticks not quotes console.log(s2) ;...
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Android ClickableSpan not calling onClick

...thod(LinkMovementMethod.getInstance()); does matter. Here's my full code String stringTerms = getString(R.string.sign_up_terms); Spannable spannable = new SpannableString(stringTerms); int indexTermsStart = stringTerms.indexOf("Terms"); int indexTermsEnd = indexTermsStart + 18; spannable.setSpan(n...
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How can I split and parse a string in Python?

I am trying to split this string in python: 2.7.0_bf4fda703454 3 Answers 3 ...
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How to pass multiple parameters in a querystring

... Query_string (Following is the text of the linked section of the Wikipedia entry.) Structure A typical URL containing a query string is as follows: http://server/path/program?query_string When a server receives a request for such a...
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How do I make a LinearLayout scrollable?

...iew android:id="@+id/title" android:text="@string/title" android:layout_widt
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Set select option 'selected', by value

... The value of the selected attribute can be an empty string or selected. Did you mean .prop()? – rink.attendant.6 Sep 17 '13 at 17:37 2 ...
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NSString: isEqual vs. isEqualToString

What is the difference between isEqual: and isEqualToString: ? 5 Answers 5 ...