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How to check that a string is an int, but not a double, etc.?
...eck that the string is an integer beforehand, so that I can give a helpful error message to the user if it's wrong. PHP has is_int() , but that returns false for string like "2" .
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Get the client IP address using PHP [duplicate]
... getenv returns a false if the variable isn't set, where $_SERVER will error with "undefined index" if the variable isn't set.
– Michael
Feb 7 '14 at 1:45
4
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How to declare an array in Python?
...ded by 3. If you attempt to do the same thing with a list, you will get an error. So, arrays are more efficient for large datasets of numbers.
– Matthew
Jul 14 '19 at 2:30
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When to use Preorder, Postorder, and Inorder Binary Search Tree Traversal strategies
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answered Jul 15 '13 at 16:05
Eric LeschinskiEric Leschinski
115k4949 gold badges368368 silver badges313313 bronze badges
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Calendar returns wrong month [duplicate]
... normally, years too. Dont you think that Android developers have made an error. Yeah, of course they did, and they cant correct it just because it would be incompatible with milions of older apps.
– TomeeNS
Nov 29 '15 at 1:41
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Can gcc output C code after preprocessing?
...s. This is also looks like a useful way to preprocess the code looking for errors in your macros. Great question and a great answer (IALCTHW).
– lee8oi
Dec 11 '18 at 16:07
add...
How to verify Facebook access token?
...https://graph.facebook.com/me?access_token=xxxxxxxxxxxxxxxxx if you get an error, the token is invalid. If you get a JSON object with an id property then it is valid.
Unfortunately this will only tell you if your token is valid, not if it came from your app.
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Insert into … values ( SELECT … FROM … )
...t only one column is selected. In the case of multiple-column subquery, an error 'subquery must return only one column' will be raised. Adopt @travis's answer then.
– snowfox
Apr 26 '16 at 2:10
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how to get html content from a webview?
...l("http://android-in-action.com/index.php?post/" +
"Common-errors-and-bugs-and-how-to-solve-avoid-them");
}
class MyJavaScriptInterface {
private Context ctx;
MyJavaScriptInterface(Context ctx) {
this.ctx = ctx;
}
public void sh...
Does a foreign key automatically create an index?
...ver must check that there are no orphan orders; if there are, it raises an error.
To check if there are any orders, Sql Server has to search the big orders table. Now if there is an index, the search will be fast; if there is not, the search will be slow.
So in this case, the slow delete could be ...