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Altering a column: null to not null
...lumns. This is undesirable for several reasons, so I am looking to update all nulls to 0 and then set these columns to NOT NULL . Aside from changing nulls to 0 , data must be preserved.
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How to find all tables that have foreign keys that reference particular table.column and have values
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This solution will not only display all relations but also the constraint name, which is required in some cases (e.g. drop constraint):
SELECT
CONCAT(table_name, '.', column_name) AS 'foreign key',
CONCAT(referenced_table_name, '.', referenced_column_n...
Eclipse - debugger doesn't stop at breakpoint
...en released against 6u16, 6u18 and 7b1). The best bet is to use -XX:+UseParallelGC flag. Increasing the size of the minimum and maximum heap size, to delay the first GC, bring temporary relief.
By the way, use this bug report in Eclipse to track how others have been faring.
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Delete newline in Vim
...wline. You can also combine this with a count, so pressing 3J will combine all 3 lines together.
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Are members of a C++ struct initialized to 0 by default?
...hot s; // receives no initialization
Snapshot s = {}; // value initializes all members
The second will make all members zero, the first leaves them at unspecified values. Note that it is recursive:
struct Parent { Snapshot s; };
Parent p; // receives no initialization
Parent p = {}; // value init...
What do Clustered and Non clustered index actually mean?
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With a clustered index the rows are stored physically on the disk in the same order as the index. Therefore, there can be only one clustered index.
With a non clustered index there is a second list that has pointers to the physical rows. You can have many non clustered ind...
Keyboard shortcuts are not active in Visual Studio with Resharper installed
...ave Visual Studio 2012 + Resharper 7.1.1000.900 + StyleCop 4.7.44 installed.
22 Answers
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CSS :after not adding content to certain elements
...t;button>, <textarea>,
<input>, and <select> tags). All other elements types can be referred
to as non-replaced elements.
:before and :after only work with non-replaced elements.
From the spec:
Note. This specification does not fully define the interaction of
:befor...
Should I use px or rem value units in my CSS? [closed]
...size of a pixel on a 96 dpi display. On a display that has a dpi substantially different than 96dpi (like Retina displays), the user agent rescales the px unit so that its size matches that of a reference pixel. In other words, this rescaling is exactly why 1 CSS pixel equals 2 physical Retina dis...
Traverse all the Nodes of a JSON Object Tree with JavaScript
... foo:"bar",
arr:[1,2,3],
subo: {
foo2:"bar2"
}
};
//called with every property and its value
function process(key,value) {
console.log(key + " : "+value);
}
function traverse(o,func) {
for (var i in o) {
func.apply(this,[i,o[i]]);
if (o[i] !== null &a...