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Initializing a list to a known number of elements in Python [duplicate]
... Yes, that's exactly the point. "Premature optimization is the root of all evil" just means that you should write code without caring about performance - at first. If you find that the code is running slow later on, then go back and make optimizations like this one.
– David Z
...
How can I break an outer loop with PHP?
... goto top;
}
}
top:
But goto must be used carefully. Goto is evil (considered bad practice)
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VBA - how to conditionally skip a for loop iteration
I have a for loop over an array. What I want to do is test for a certain condition in the loop and skip to the next iteration if true:
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Remove blank attributes from an Object in Javascript
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You can loop through the object:
var test = {
test1 : null,
test2 : 'somestring',
test3 : 3,
}
function clean(obj) {
for (var propName in obj) {
if (obj[propName] === null || obj[propName] === undefined) {
delete obj[propName];
}
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How to check if a string “StartsWith” another string?
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WARNING! These jsperf tests don't work in browsers that are good at JIT compiling. Browsers like Firefox and Chrome sometimes recognize it when the result of an operation is discarded, and therefore don't perform the operation. Apart from that, mo...
How to check if the string is empty?
... then you should use myString == "". See the documentation on Truth Value Testing for other values that are false in Boolean contexts.
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Convert string to variable name in JavaScript
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@goggin You should regex-test the argument to make sure that it's a valid name. Just evaling the argument without checking it first is ridiculously insecure.
– Šime Vidas
Apr 10 '11 at 18:54
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How to get a user's client IP address in ASP.NET?
...rity checks, an attacker can bypass it easily.
– dr. evil
Nov 27 '13 at 9:43
4
From your link, wh...
What are the most common naming conventions in C?
...ingOrder *bar.
Global variables: just don't use global variables. They are evil.
Functions that are there, but
shouldn't be called directly, or have
obscure uses, or whatever: one or more
underscores at the beginning:
_refrobnicate_data_tables(), _destroy_cache().
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Prevent user from seeing previously visited secured page after logout
...resence of the logged-in user.
Don't forget to clear browser cache before testing! ;)
See also:
Authentication filter and servlet for login
How to control web page caching, across all browsers?
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