poly trim

For example:Select. key, B. key, C. key from A, B, C where trim (. key) = trim (B. fk) and trim (. col) = trim (C. pk ).It takes one second to associate primary Table A (more than 200 records) with Appendix B (more than 40 thousand records). This value may vary with machines, however, it is a little slower than

Remove leading and trailing spaces.Assume that there is a string "ddd dd d", which is "ddd dd d" after Trim ".You can remove unnecessary spaces (including tabs) on both sides, but do not remove spaces in the middle.The trim () function in PHP has the same usage as the trim () function in ASP. If you have been familiar with ASP, you will naturally use it.The usage

Oracle TRIM functions are common functions. the syntax of Oracle TRIM functions is described in detail below. We hope you can have a deeper understanding of Oracle TRIM functions. If Oracle TRIM function is mentioned, the simplest function is to use it to remove spaces at the beginning and end of the line of a string.

The W3C team's head was kicked off until javascript1.8.1 supported the trim function (with trimleft and trimright). Unfortunately, only firefox3.5 supported it now. Since the blank spaces on both sides of the string are too common, all major types of databases have their shadows. In addition, foreigners are very engaged in research, and many implementations have been made. Implementation 1 1. String. Prototype.

Oracle trim, ltrim, rtrim function usageThis function has two functions:First, remove spaces that everyone is familiar.Example:-- Trim removes leading and trailing spaces of a specified characterSQL> select trim ('dd df') from dual;Trim ('dddf ')------------Dd DF -- Ltrim removes spaces before a specified characterSQL>

Similar to the following: Select A.key,b.key,c.key from A,b,c where trim (a.key) =trim (B.FK) and trim (A.col) =trim (c.pk). In Table A (more than 200 records), the associated schedule B (more than 40,000 records) was used for 1 seconds, which may vary between machines, but slightly slower than the

Remove the space before and after. Suppose there is a string "DDD dd D", after trim () becomes "DDD dd D". If you can remove the extra space on both sides (including tabs), but not the middle space. The trim () function in PHP is the same as the use of the trim () function in ASP, which is naturally used if you have been exposed to ASP. The usage is simple, add

In ie 7 8 browser, if space is removed using the trim () attribute, an error is reported.Therefore, there are the following solutions to solve this problem:Currently, there are 12 methods to remove spaces in JS:Implementation 1String. prototype. trim = function () {return this. replace (/^ \ s */,''). replace (/\ s * $ /,'');}Implementation 2String. prototype. trim