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git diff file against its last change

...mit in the list. This also works for directories, but then you also get to select the file to diff for the selected commit. Super useful! share | improve this answer | follow...
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How do I create a unique constraint that also allows nulls?

...dy found separately in other, properly defined columns. It should never be selected or used. So, my story is that this is not a surrogate NULL, and I'm sticking to it! Since we don't actually want the non-NULL value for any purpose other than to trick the UNIQUE index to ignore NULLs, our use case ...
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When to Redis? When to MongoDB? [closed]

...e, writing stupid sql statements... not just one but freaking everywhere. "select this, select that". But in particular you remember the irritating WHERE clause. Where lastname equals "thornton" and movie equals "bad santa." Urgh. You think, "why don’t those dbas just do their job and give me som...
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Check if a div exists with jquery [duplicate]

...myDiv.length){ //you can now reuse $myDiv here, without having to select it again. } }); A selector always returns a jQuery object, so there shouldn't be a need to check against null (I'd be interested if there is an edge case where you need to check for null - but I don't think the...
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Sublime Text 2 - Link with Editor / Show file in sidebar

... This is a useful answer, but the selected answer replicates the functionality of 'Eclipse's Link with Editor.' as requested in the question. i.e. reveal_in_side_bar the active file without the need to press a shortcut. – serby ...
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Border around specific rows in a table?

...etty dynamic data. Using nth-child(), nth-last-child(), and not(), you can select any rows/cells you want (as long as you know the relative indexes of things in the table). For example, you can select all rows except the top two and bottom one with tr:not(:nth-child(-n+2)):not(:nth-last-child(1)) ...
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What is a pre-revprop-change hook in SVN, and how do I create it?

...n VisualSVN by right-clicking your repository name in VisualSVN Server and selecting "Properties...". You'll see a "Hooks" tab. In there you'll see the different types of hooks available. Select the right one, click "Edit" and paste the above code into it. Hope that helps VisualSVN users! ...
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Should I use #define, enum or const?

... this type. To track the current state of a record and to create a mask to select records in certain states. Create an inline function to test if the value of the type is valid for your purpose; as a state marker vs a state mask. This will catch bugs as the typedef is just an int and a value such as...
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Unable to install gem - Failed to build gem native extension - cannot load such file — mkmf (LoadErr

... reinstalled like this: rm -rf /Library/Developer/CommandLineTools xcode-select --install Then i ran the previous command again: open /Library/Developer/CommandLineTools/Packages/macOS_SDK_headers_for_macOS_10.14.pkg After install the error was fixed! ...
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How can I change an element's text without changing its child elements?

...to_change.nodeValue = 'new text'; Of course, you can still use jQuery to select the <div> in the first place (i.e. var your_div = $('your_div').get(0);). share | improve this answer ...