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@RequestParam vs @PathVariable

...equest, the values for param1 and param2 can be accessed as below: public String getDetails( @RequestParam(value="param1", required=true) String param1, @RequestParam(value="param2", required=false) String param2){ ... } The following are the list of parameters supported by the @Reque...
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Can table columns with a Foreign Key be NULL?

...otherwise I would get a constraint violation error (as opposed to an empty string). share | improve this answer | follow | ...
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Visual Studio window which shows list of methods

... You will find "Options" in the menu under "Extras". – ohgodnotanotherone Sep 4 '17 at 8:43 ...
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How to manually trigger validation with jQuery validate?

...r unobtrusive validation only for this element if in place // add your extra logic here to execute only when element is valid } Note that validate() needs to be called on the form before checking it using this method. Documentation link: https://jqueryvalidation.org/valid/ ...
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How to click or tap on a TextView text

...k(View v) { if ("Boiling Point K".equals(boilingpointK.getText().toString())) boilingpointK.setText("2792"); else if ("2792".equals(boilingpointK.getText().toString())) boilingpointK.setText("Boiling Point K"); } }); ...
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What is the Difference Between Mercurial and Git?

...heuristic like in Git, there is nothing in the model that precludes adding extra information to a snapshot, e.g., rename information. We do that in Mercurial. – Martin Geisler Jan 26 '11 at 9:05 ...
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Why do I need to override the equals and hashCode methods in Java?

...d equals() generated by eclipse) public class MyClass { private final String importantField; private final String anotherField; public MyClass(final String equalField, final String anotherField) { this.importantField = equalField; this.anotherField = anotherField; }...
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Subtract two variables in Bash

... You just need a little extra whitespace around the minus sign, and backticks: COUNT=`expr $FIRSTV - $SECONDV` Be aware of the exit status: The exit status is 0 if EXPRESSION is neither null nor 0, 1 if EXPRESSION is null or 0. Keep this in min...
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How do you launch the JavaScript debugger in Google Chrome?

...n a Mac, or just inspect an element). If you have Developer Tools open, an extra bit of awesomeness is that you can click and hold the Refresh button to clear the cache. – toon81 Jul 8 '14 at 9:21 ...
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How to find serial number of Android device?

... (TelephonyManager)myActivity.getSystemService(Context.TELEPHONY_SERVICE); String uid = tManager.getDeviceId(); getSystemService is a method from the Activity class. getDeviceID() will return the MDN or MEID of the device depending on which radio the phone uses (GSM or CDMA). Each device MUST ...