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【解决】double free or corruption (!prev) - C/C++ - 清泛网 - 专注C/C++及内核技术
...大小，在free的时候也会检测出来，报这个错误，如：
char* buf = malloc(5);
memcpy(buf, "123456", 6);
free(buf); //free时报此错误
实际项目中可能此类问题没法直观定位到，推荐使用gcc自带的 asan 检查内存错误。
asan 内存跟踪
libunwind：记录程序崩溃堆栈 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...all
记录堆栈的代码如下：
static void log_backtrace(void) {
char name[256];
unw_cursor_t cursor;
unw_context_t uc;
unw_word_t ip, sp, offp;
unw_getcontext(&uc);
unw_init_local(&cursor, &uc);
syslog(LOG_ERR, "--illegal memory access--");
while(unw_step(&cursor) > 0) {...
Regex, every non-alphanumeric character except white space or colon
... - matches all the letters
^ - negates them all - so you get - non numeric chars, non spaces and non colons
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How to export iTerm2 Profiles
...fter you reinstalled your OS.
If the Save settings to Folder is disabled, select a folder (e.g. empty) in the Load preferences from a custom folder or URL: text box.
In iTerm2 3.3 on OSX the sequence is: iTerm2 menu, Preferences, General tab, Preferences subtab
...
Does PostgreSQL support “accent insensitive” collations?
...n unaccent() you can use with your example (where LIKE seems not needed).
SELECT *
FROM users
WHERE unaccent(name) = unaccent('João');
Index
To use an index for that kind of query, create an index on the expression. However, Postgres only accepts IMMUTABLE functions for indexes. If a functio...
How do I remove all specific characters at the end of a string in PHP?
How do I remove the last character only if it's a period?
9 Answers
9
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Hide all but $(this) via :not in jQuery selector
...ean $("table tr") (with a space instead of a dot).
The way you have it, it selects every table which has a class of tr (eg, <table class="tr">), which is probably not what you want.
For more information, see the documentation.
...
adb not finding my device / phone (MacOS X)
...you can get to it via the Apple Menu in the top left corner of the screen, select "About this Mac", then click the "More Info..." button. Screen grab here:
Expand the "Hardware" tree, select "USB", then look for your target device. In the above example, my device is named "SomeDevice" (I did tha...
Numeric for loop in Django templates
... center creates a string of n spaces that are then looped over. Each space char is then ignored, but the current value in range can be found from forloop.counter (or forloop.counter0). See docs.djangoproject.com/en/dev/ref/templates/builtins/#center
– isedwards
...
How to check file MIME type with javascript before upload?
...d see three remote images of different types displayed. At the top you can select a local image or data file, and the file signature and/or MIME type will be displayed.
Notice that even if an image is renamed, its true MIME type can be determined. See below.
Screenshot
// Return the first...