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How to conditionally push an item in an observable array?

I would like to push a new item onto an observableArray , but only i<em>fem> the item is not already present. Is there any "<em>fem>ind" <em>fem>unction or recommended pattern <em>fem>or achieving this in KnockoutJS? ...
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In Java, how do I parse XML as a String instead o<em>fem> a <em>fem>ile?

I have the <em>fem>ollowing code: 6 Answers 6 ...
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How do I install an old version o<em>fem> Django on virtualenv?

This may sound like a stupid question, since the very purpose o<em>fem> virtualenv is to this exactly: Installing some speci<em>fem>ic version o<em>fem> a package (in this case Django) inside the virtual environment. But it's exactly what I want to do, and I can't <em>fem>igure it out. ...
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Write string to output stream

I have several output listeners that are implementing OutputStream. It can be either a PrintStream writing to stdout or to a <em>Fem>ile, or it can be writing to memory or any other output destination; there<em>fem>ore, I speci<em>fem>ied OutputStream as (an) argument in the method. ...
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What does %5B and %5D in POST requests stand <em>fem>or?

I'm trying to write a Java class to log in to a certain website. The data sent in the POST request to log in is 7 Answers ...
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“Templates can be used only with <em>fem>ield access, property access, single-dimension array index, or sin

Why am I receiving the error: 4 Answers 4 ...
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Iterating Through a Dictionary in Swi<em>fem>t

I am a little con<em>fem>used on the answer that Xcode is giving me to this experiment in the Swi<em>fem>t Programming Language Guide: 7 ...
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Using “label <em>fem>or” on radio buttons

When using the "label <em>fem>or" parameter on radio buttons, to be 508 compliant *, is the <em>fem>ollowing correct? 3 Answers ...
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Rails migrations: Undo de<em>fem>ault setting <em>fem>or a column

I have the problem, that I have an migration in Rails that sets up a de<em>fem>ault setting <em>fem>or a column, like this example: 4 Ans...
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'str' object does not support item assignment in Python

I would like to read some characters <em>fem>rom a string and put it into other string (Like we do in C). 7 Answers ...