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Possible to do a MySQL foreign key to one of two possible tables?

...ecific type of filter is easy if you know which type you want to join to: SELECT * FROM Products INNER JOIN FiltersType2 USING (product_id) If you want the filter type to be dynamic, you must write application code to construct the SQL query. SQL requires that the table be specified and fixed at ...
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Setting a system environment variable from a Windows batch file?

...s it possible to set a environment variable at the system level from a command prompt in Windows 7 (or even XP for that matter). I am running from an elevated command prompt. ...
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Using sed and grep/egrep to search and replace

... Use this command: egrep -lRZ "\.jpg|\.png|\.gif" . \ | xargs -0 -l sed -i -e 's/\.jpg\|\.gif\|\.png/.bmp/g' egrep: find matching lines using extended regular expressions -l: only list matching filenames -R: search recursively th...
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Github Push Error: RPC failed; result=22, HTTP code = 413

... Information Services (IIS) Manager Expand the Server field Expand Sites Select the site you want to make the modification for. In the Features section, double click Configuration Editor Under Section select: system.webServer > serverRuntime Modify the uploadReadAheadSize section (The value mus...
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In a Bash script, how can I exit the entire script if a certain condition occurs?

...oniLeigh If it's closing the "window" likely you're putting the exit # command inside a function, not a script. (In which case use return # instead.) – Jamie Jan 6 at 20:27 a...
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How to get a value from a cell of a dataframe?

... Most answers are using iloc which is good for selection by position. If you need selection-by-label loc would be more convenient. For getting a value explicitly (equiv to deprecated df.get_value('a','A')) # this is also equivalent to df1.at['a','A'] In [55]: df1....
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JSON.net: how to deserialize without using the default constructor?

...d really help if it was possible to set another convention for constructor selection. For instance, I think the Unity container supports this. Then you could make it so that it always selected the constructor with most parameters instead of falling back to the default one. Any possibility such a ext...
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Disable EditText blinking cursor

...ible="false/true" android:focusable="false/true" To make edit_text Selectable to (copy/cut/paste/select/select all) editText.setTextIsSelectable(true); To focus on touch mode write following lines in XML android:focusableInTouchMode="true" android:clickable="true" android:f...
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Rearranging Tab Bar Controller Order in StoryBoard

...'t even know we could drag the tabs. Not very intuitive since tabs are not selectable... – Pierre de LESPINAY Jun 16 '14 at 13:27 1 ...
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Is there a way to get element by XPath using JavaScript in Selenium WebDriver?

... For something like $x from chrome command line api (to select multiple elements) try: var xpath = function(xpathToExecute){ var result = []; var nodesSnapshot = document.evaluate(xpathToExecute, document, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null ); for ( var i=0 ...