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How do I concatenate two strings in C?
...-terminator.
char* concat(const char *s1, const char *s2)
{
const size_t len1 = strlen(s1);
const size_t len2 = strlen(s2);
char *result = malloc(len1 + len2 + 1); // +1 for the null-terminator
// in real code you would check for errors in malloc here
memcpy(result, s1, len1);
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How can I get the SQL of a PreparedStatement?
...
Although this is functionally true, there's nothing preventing utility code from reconstructing an equivalent unprepared statement. For example, in log4jdbc: "In the logged output, for prepared statements, the bind arguments are automatically insert...
How can I make a Python script standalone executable to run without ANY dependency?
...'m building a Python application and don't want to force my clients to install Python and modules.
19 Answers
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How to programmatically take a screenshot on Android?
... save the file:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
And this is the code (running in an Activity):
private void takeScreenshot() {
Date now = new Date();
android.text.format.DateFormat.format("yyyy-MM-dd_hh:mm:ss", now);
try {
//...
PHP filesize MB/KB conversion [duplicate]
...and 42% more costly to be precise (depending on which if condition $bytes falls into).
– Alix Axel
May 25 '13 at 3:48
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QuotaExceededError: Dom exception 22: An attempt was made to add something to storage that exceeded
...ode browsing. While in private browsing, local storage is not available at all.
One solution is to warn the user that the app needs non-private mode to work.
UPDATE: This has been fixed in Safari 11, so the behaviour is now aligned with other browsers.
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How to get scrollbar position with Javascript?
...roll position isn't set on document.body in most modern browsers - it's usually set on document.documentElement now. See bugs.chromium.org/p/chromium/issues/detail?id=157855 for Chrome's transition.
– fzzfzzfzz
May 3 '18 at 15:51
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Reading/parsing Excel (xls) files with Python
... pandas is using xlrd to do the reading; you will need to also install xlrd as a dependency
– congusbongus
Jul 16 '19 at 1:24
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What is the difference between null and undefined in JavaScript?
...he typeof operator returns 'object' for a value that is null. This was actually an error in the original JavaScript implementation that was then copied in ECMAScript. Today, it is rationalized that null is considered a placeholder for an object, even though, technically, it is a primitive value."
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What is the best way to tell if a character is a letter or number in Java without using regexes?
...racter-sets and or display fonts mixed up. Unicode codepoint u00ff is actually the character ÿ. (Lower-case y with an umlaut.) The codepoint that represents ├ is u251c.
– Stephen C
Jun 1 at 11:56
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