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Convert one date format into another in PHP
...n't recognize the y-m-d-h-i-s format.
PHP 5.3 and up
Use DateTime::createFromFormat. It allows you to specify an exact mask - using the date() syntax - to parse incoming string dates with.
PHP 5.2 and lower
You will have to parse the elements (year, month, day, hour, minute, second) manually usi...
What is a “Bitmap heap scan” in a query plan?
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The best explanation comes from Tom Lane, which is the algorithm's author unless I'm mistaking. See also the wikipedia article.
In short, it's a bit like a seq scan. The difference is that, rather than visiting every disk page, a bitmap index scan AND...
How to apply shell command to each line of a command output?
Suppose I have some output from a command (such as ls -1 ):
8 Answers
8
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Does the 'mutable' keyword have any purpose other than allowing the variable to be modified by a con
...nly bitwise const and the 'mutable' keyword can be used to exclude members from this checking. It is not possible to achieve 'logical' const in C++ other than via abstractions (eg. SmartPtrs).
– Richard Corden
Sep 22 '08 at 8:13
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Round to at most 2 decimal places (only if necessary)
...ding
Solution 2 is to avoid front end calculations and pull rounded values from the backend server.
Edit: Another possible solution, which is not a bullet proof also.
Math.round((num + Number.EPSILON) * 100) / 100
In some cases, when you round number like 1.3549999999999998 it will return incorrect...
What does the construct x = x || y mean?
...it is often considered a bad programming practice, because it prevents you from passing a falsey value (which is not necessarily undefined or null) as a parameter. Consider following example:
function badFunction(/* boolean */flagA) {
flagA = flagA || true;
console.log("flagA is set to " + (fla...
How to validate an e-mail address in swift?
... doesn't detect email.@invalid.com or email@.invalid.com. The answer below from @alexcristea does
– Ben Sullivan
Nov 23 '16 at 9:42
4
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How to open a new tab using Selenium WebDriver?
...w instead of ne tab. It does so on Firefox in test mode. At least when run from Katalon (which uses Selenium under the hood).
– Nux
Sep 3 at 9:06
add a comment
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Choosing the default value of an Enum type without having to change values
...S 1. No, but admitting you were wrong is. 2. He didn't earn any reputation from comment upvotes.
– Aske B.
Nov 23 '12 at 13:01
7
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How to replace plain URLs with links?
...u insist on a regular expression, the most comprehensive is the URL regexp from Component, though it will falsely detect some non-existent two-letter TLDs by looking at it.
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