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How to check if field is null or empty in MySQL?
....entdt>=''',FROMDATE ,''' AND t.entdt<=''',TODATE ,''' ',VTYPE,'
ORDER BY CAST(ENTDT AS DATE)) AS ta
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@import vs #import - iOS 7
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How do you unit test private methods?
...etimes like to call private methods from test methods. Most of the time in order to prevent code duplication for test data generation...
Microsoft provides two mechanisms for this:
Accessors
Goto the class definition's source code
Right-click on the name of the class
Choose "Create Private Acces...
How does the SQL injection from the “Bobby Tables” XKCD comic work?
...nowing the password. So you don't need to be able to use two statements in order to use SQL injection, although you can do more destructive things if you are able to supply multiple statements.
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SQLite add Primary Key
...tests (in sqlite shell):
sqlite> explain query plan select * from tab1 order by i,j;
0|0|0|SCAN TABLE tab1 USING INDEX sqlite_autoindex_tab1_1
sqlite> drop index sqlite_autoindex_tab1_1;
Error: index associated with UNIQUE or PRIMARY KEY constraint cannot be dropped
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Change string color with NSAttributedString?
...sible UIViewController implementation that relies on NSAttributedString in order to update the text and text color of a UILabel from a UISlider:
import UIKit
enum Status: Int {
case veryBad = 0, bad, okay, good, veryGood
var display: (text: String, color: UIColor) {
switch self {
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Redefine tab as 4 spaces
...our tab character width to be different from the width of your indents, in order to reduce the chance of tab characters masquerading as proper indents. (list + expandtab can help here too) Also, 8-char-wide tabs is "the standard" -- your terminal, Python, and many other tools default to 8-char-wide-...
Create thumbnail image
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How to convert floats to human-readable fractions?
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If the the output is to give a human reader a fast impression of the order of the result, it makes no sense return something like "113/211", so the output should limit itself to using one-digit numbers (and maybe 1/10 and 9/10). If so, you can observe that there are only 27 different fraction...
How to enable CORS in AngularJs
...end an HTTP OPTIONS request header to the resource on the other domain, in order to determine whether the actual request is safe to send. Cross-site requests are preflighted like this since they may have implications to user data. In particular, a request is preflighted if it uses methods other than...