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What's the difference between NOT EXISTS vs. NOT IN vs. LEFT JOIN WHERE IS NULL?

...ot slower. On the other hand, a join may also perform badly if there is no index that can be used, so just because you use a join doesn't mean that you are safe. You would have to examine the execution plan of the query to tell if there may be any performance problems. ...
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Populating a ListView using an ArrayList?

...w OnItemClickListener() { // argument position gives the index of item which is clicked public void onItemClick(AdapterView<?> arg0, View v,int position, long arg3) { String selectedmovie=movies.get(position); Toast.makeText...
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Chrome DevTools Devices does not detect device when plugged in

...SB-Driver-for-Windows Install Android SDK http://developer.android.com/sdk/index.html Install Android SDK Platform-tools http://developer.android.com/sdk/installing/adding-packages.html (this step was blocked on corporate wifi so I installed the single ADB package it required https://forum.xda-devel...
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Java SE 6 vs. JRE 1.6 vs. JDK 1.6 - What do these mean?

...ava SE Downloads": http://www.oracle.com/technetwork/java/javase/downloads/index.html Click "JDK Download" and visit "Java SE Development Kit 7 Downloads": http://www.oracle.com/technetwork/java/javase/downloads/java-se-jdk-7-download-432154.html (note that following the link from step #1 will take ...
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How can I develop for iPhone using a Windows development machine?

...f now) $10 a month. I am sure others have too. [1]: virtualmacosx.com/index.php/xcode-plans – Prof. Falken May 6 '13 at 14:58 ...
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Declaring a custom android UI element using XML

...rs, com.android.internal.R.styleable.TextView, defStyle, 0); int n = a.getIndexCount(); for (int i = 0; i < n; i++) { int attr = a.getIndex(i); // huge switch with pattern value=a.getXXX(attr) <=> a.getXXX(a.getIndex(i)) } a.recycle(); What we can see here? obtainStyledAttribute...
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Proper way to declare custom exceptions in modern Python?

...sible to pass in multiple items to the exception and access them via tuple indexes, but this is highly discouraged (and was even intended for deprecation a while back). If you do need more than a single piece of information and the above method is not sufficient for you, then you should subclass Exc...
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How to make the 'cut' command treat same sequental delimiters as one?

...l -lane 'print $F[3]' text.txt However, the @F autosplit array starts at index $F[0] while awk fields start with $1 share | improve this answer | follow | ...
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How do I copy directories recursively with gulp?

...aking the beginning of the path relative. For your case: gulp.src([ 'index.php', '*css/**/*', '*js/**/*', '*src/**/*', ]) .pipe(gulp.dest('/var/www/')); The reason this works is that Gulp sets the base to be the end of the first explicit chunk - the leading * causes it to set the...
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When to use Vanilla JavaScript vs. jQuery?

...ari.) this.className to get or set an entire "class" property this.selectedIndex against a <select> to get the selected index this.options against a <select> to get a list of <option> elements this.text against an <option> to get its text content this.rows against a <table...